CN103456835A - Device and method for preparing gate electrodes of solar cell - Google Patents

Device and method for preparing gate electrodes of solar cell Download PDF

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CN103456835A
CN103456835A CN2013103296718A CN201310329671A CN103456835A CN 103456835 A CN103456835 A CN 103456835A CN 2013103296718 A CN2013103296718 A CN 2013103296718A CN 201310329671 A CN201310329671 A CN 201310329671A CN 103456835 A CN103456835 A CN 103456835A
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nozzle
gate electrode
height
control
control unit
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CN2013103296718A
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CN103456835B (en
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黄永安
尹周平
汤朋朋
潘艳桥
吴林松
熊有伦
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华中科技大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product
    • Y02P70/52Manufacturing of products or systems for producing renewable energy
    • Y02P70/521Photovoltaic generators

Abstract

The invention provides a device and method for preparing gate electrodes of a solar cell. The device comprises a silver paste supplying device, a nozzle height adjusting module, a nozzle, a programmable-control high-voltage generator, an adsorption platform, a motion platform and a control unit. The method comprises the steps of placing a solar substrate on the adsorption platform, and preparing the first gate electrode and the second gate electrode, wherein the width of the second gate electrode is larger than that of the first gate electrode. The electric spinning direct writing process is utilized for printing the solar electrodes, an electric field is utilized for pulling silver paste in the nozzle to lines with the diameters smaller than the diameter of the nozzle, and the widths and the heights of the printed grid lines can be controlled by controlling the different voltages, the height of the nozzle and the feed speed of a substrate. The voltages affect the stability of a Taylor cone at a certain height, the height affects the heights of the printed grid lines mainly by affecting the degree of cure of the grid lines in the air, the larger the height is, the higher the printed grid lines become, the feed speed of the substrate mainly affects the widths of the printed grid lines, and the higher the speed is, the thinner the grid lines become.

Description

—种制备太阳能电池栅电极的装置及方法 - means for producing a solar cell and a method species gate electrode

技术领域 FIELD

[0001] 本发明属于太阳能电池领域,更具体地,涉及一种制备太阳能电池栅电极的装置及方法。 [0001] The present invention belongs to the field of solar cells, and more particularly, to an apparatus and a method for manufacturing a solar cell of the gate electrode.

背景技术 Background technique

[0002] 太阳能电池是通过光电效应或者光化学效应直接把光能转化成电能的装置。 [0002] Solar cells are devices that directly convert light into electricity by photoelectric effect or photochemical effect. 随着光伏行业的不断进步,市场对光伏产品提出了更高要求。 With the development of the photovoltaic industry, the market for photovoltaic products and a higher requirement. 高效、低成本已成为太阳能电池发展的重要目标。 Efficient, cost has become an important goal of solar cell development. 太阳能电池片生产的关键步骤之一是在硅片上的正面和背面制作非常精细的电路,将光生电子导出电池。 One of the key step is the production of solar cells on the wafer front and back making very fine circuits, the photogenerated electrons derived cell. 同时为了获得高效太阳能电池,栅线的遮光面积要减小,同时又要具备高效的电荷收集能力,因此太阳能电池正面栅电极的制备显得尤其重要。 Meanwhile, in order to obtain efficient solar cells, light-shielding area of ​​the gate line to be reduced, while also with efficient charge collection capability, thus producing a solar cell front surface of the gate electrode is particularly important.

[0003] 目前,太阳能电池栅线电极的制备一般采用丝网印刷工艺。 [0003] Currently, the preparation of a solar cell using the gate line electrode is generally a screen printing process. 一般的丝网印刷机具有:印刷载物台、印刷掩膜以及刮板;印刷载置台在载置台面上具有多个吸附孔,通过真空吸附来支撑固定被载置在该载置台面上的被印刷物;印刷掩模用于在支撑固定于该印刷载置台上的被印刷物上形成规定的电极图案;刮板用于向配置在该印刷掩模上的导电浆料施加既定的压力、向被印刷物进行印刷。 General screen printer comprising: a printing stage, the printing mask and a squeegee; printing stage having a plurality of suction holes in the mounting table, supported by a fixed vacuum which is placed on the mounting table printing mask for the electrode pattern to be printed on the printing support is fixed to the mounting table is formed of predetermined;; a print squeegee is used to apply a predetermined pressure to the printing mask is disposed on the conductive paste, to be printing a printed matter.

[0004] 传统工艺制备的栅线宽度通常在80微米以上,高度为5〜30微米,宽的栅线遮光面积大,影响光的吸收;但栅线变细,电池的欧姆接触电阻变大,限制了电流的收集能力,致使太阳能电池的转化效率降低。 [0004] The gate width of the conventional preparation processes typically less than 80 microns, a height of 5~30 micrometers, the line width of the gate light-shielding area, affecting the absorption of light; however ohmic contact resistance of the gate line becomes thin, the battery is increased, limits the collector current capability, resulting in decrease in conversion efficiency of the solar cell. 因此,要获得高效率的电池,必须减小栅线宽度,提高栅线的高宽比。 Thus, to obtain high efficiency of the battery, the gate width must be reduced, to improve the aspect ratio of the gate line. 传统的丝网印刷工艺已经很难做到。 The traditional screen printing process has been difficult to achieve. 除此之外,丝网印刷工艺还存在浪费银浆,工艺设备贵,丝网存在磨损,断栅和虚印,不能数控等缺点。 In addition, there are a screen printing process waste paste, expensive process equipment, a screen for wear, breaking the gate and the dummy plate, not NC disadvantages. 也在一定程度上增加了太阳能电池的成本。 Also it increases the cost of solar cells to a certain extent. 另外丝网印刷工艺本身的不稳定性,比如在使用过程中由于持续不断的压力造成的网版张力的退化,并且网版的压力也有可能造成电池片损坏,以及栅线宽度的增加,都对电池片效率的整体分布产生了很大的影响,对整体效率造成了一定的降低。 Also the screen printing process itself is not stable, such as tension degradation during use due to the pressure caused by continuous screen, and the screen of the pressure plate may cause damage to the battery, and an increase in the width of the gate line, all of the overall efficiency of the distribution of solar cells had a significant impact on the overall efficiency caused some degraded.

发明内容 SUMMARY

[0005] 针对现有技术的以上缺陷或改进需求,本发明提供了一种制备太阳能电池栅电极的装置,其目的在于提高太阳能电池转换效率,由此解决了现有太阳能电池栅线制备过程中由光吸收率低导致的太阳能电池转换效率低的技术问题。 [0005] To solve the above drawbacks of the prior art or the need for improvement, the present invention provides an apparatus for preparing a gate electrode of a solar cell, and its object is to improve the conversion efficiency of the solar cell, thereby solving the conventional solar cell manufacturing process of the gate line the solar cell conversion efficiency is low technical problem caused by the light absorption rate is low.

[0006] 本发明提供了一种制备太阳能电池栅电极的装置,包括银浆供给装置,喷嘴高度调节模块,喷嘴,可程控的高压发生器,吸附平台,运动平台和控制单元;所述喷嘴包括打印端,银浆供给接口和电接口;所述银浆供给装置的输入控制端与控制单元连接,银浆供给装置的输出控制端与喷嘴的银浆供给接口连接,所述银浆供给装置用于在所述控制单元的控制下为所述喷嘴提供银浆和为电纺丝提供所需的背压;喷嘴高度调节模块的一端连接控制单元,喷嘴高度调节模块的另一端连接喷嘴,所述喷嘴高度调节模块用于在所述控制单元的控制下调节所述喷嘴的喷印打印端与太阳能基板之间的高度;所述高压发生器的输出正端连接至所述喷嘴的电接口,所述高压发生器的输出负端连接所述吸附平台,所述高压发生器的输入控制端连接至所述控制单元,所述 [0006] The present invention provides an apparatus for preparing a solar cell of the gate electrode, silver paste supplying means includes a nozzle height adjustment module, a nozzle, a programmable high-voltage generator, the suction stage, motion platform and a control unit; the nozzle comprises print side silver paste supply and electrical interfaces; input control terminal of said paste supplying unit are connected to the control means, supplied to the output interface control terminal silver paste supply device and the nozzle, the paste supplying device to provide, under the control of the control unit and the silver paste to the nozzle backpressure to provide the desired electrospinning; nozzle height adjustment control unit is connected to one end of the module, nozzle height adjusting module is connected to the other end of the nozzle, the a nozzle height adjusting means for under control of the control unit to adjust the height between the printing end of the print nozzles of the solar substrate; the positive output terminal of said high voltage generator is connected to the nozzle of the electrical interface, the said high voltage generator is connected to the negative output terminal of the suction stage, a control input terminal of said high voltage generator is connected to the control unit, the 高压发生器用于在所述控制单元的控制下,在所述喷嘴和吸附于吸附平台上的基板之间施加电压,形成高压电场,使得银浆在所述喷嘴的打印端形成泰勒锥,并在高压电场的作用下进一步拉扯出丝;所述运动平台的控制端连接至所述控制单元,所述吸附平台设置于所述运动平台上,所述运动平台用于在所述控制单元的控制下,带动吸附于吸附平台上的基板做直线运动,完成栅电极图形打印。 A high voltage generator under control of the control unit, voltage is applied between the nozzle and the substrate adsorbed on the suction stage, high voltage electric field is formed, so that the print paste is formed at an end of the Taylor cone nozzle, and under the action of a high electric field is further pull wire; a control terminal of the motion platform connected to the control unit, the suction platform provided on the motion platform, the platform motion under control of the control unit , driven adsorbed on the substrate adsorption platform linear motion, the gate electrode pattern printing is completed.

[0007] 更进一步地,所述喷嘴为单个喷嘴或多个阵列排布的喷嘴。 [0007] Furthermore, the nozzle is a single nozzle or plurality of nozzles arranged in an array.

[0008] 更进一步地,还包括:设置于吸附平台与太阳能基板之间的绝缘层。 [0008] Still further, further comprising: an insulating layer disposed on the adsorbent between the platform and the solar substrate.

[0009] 更进一步地,还包括:设置于所述吸附平台上方的卷到卷装置。 [0009] Still further, further comprising: a platform disposed above the roll-to-roll to said suction means.

[0010] 本发明还提供了一种制备太阳能电池栅电极的方法,包括下述步骤: [0010] The present invention further provides a method of making a solar cell of the gate electrode, comprising the steps of:

[0011] (I)将太阳能基板设置于吸附平台上; [0011] (I) adsorbed on the solar substrate disposed on the platform;

[0012] (2)制备第一栅电极 [0012] (2) Preparation of the first gate electrode

[0013] (2.1)将直径为100〜400微米的喷嘴设置于喷嘴高度调节模块上,并将所述喷嘴的电接口与高压发生器连接,将所述喷嘴的银浆供给接口与银浆供给装置连接,所述喷嘴的打印端垂直于所述太阳能基板; Silver paste is supplied with the supply port [0013] (2.1) [mu] m diameter of a nozzle disposed at 100~400 nozzle height adjustment module, and an electrical interface connected to the nozzle and high voltage generator, the said nozzle means connected to the print end of the nozzle is perpendicular to the solar substrate;

[0014] (2.2)控制单元输出第一控制信号控制银浆供给装置给所述喷嘴的容腔内注入银浆; [0014] (2.2) control means outputs a first control signal to said paste supplying means cavity of the injection nozzle paste;

[0015] (2.3)控制单元输出第二控制信号控制喷嘴高度调节模块中滑块沿着丝杆滑动,调节喷嘴阵列高度为0.5〜2cm ; [0015] (2.3) control means outputs the second control signal the height adjustment of the nozzle module slider sliding along the screw, adjust the height of the nozzle array 0.5~2cm;

[0016] (2.4)控制单元输出第三控制信号控制高压发生器给喷嘴与吸附平台之间施加电压;电压被设置为0.8〜2kv ; [0016] (2.4) the control unit outputs a third control signal to the high voltage generator, a voltage is applied between the nozzle and the suction stage; voltage is set 0.8~2kv;

[0017] (2.5)控制单元输出第四控制信号控制运动平台沿X向以150〜300mm/s的速度运动,并形成第一栅电极; [0017] (2.5) the control unit outputs a fourth control signal in the X direction to the motion platform 150~300mm / s motion speed, and forming a first gate electrode;

[0018] (3)根据制备第一栅电极的步骤制备第二栅电极,所述第二栅电极的宽度大于所述第一栅电极的宽度。 [0018] (3) a second gate electrode was prepared according to the step of preparing the first gate electrode, the width of the second gate electrode is greater than a width of the first gate electrode.

[0019] 更进一步地,制备第二栅电极的步骤(3)具体包括: [0019] Furthermore, step (3) Preparation of the second gate electrode comprises:

[0020] (3.1)将直径为500〜1000微米的喷嘴设置于喷嘴高度调节模块上,并将所述喷嘴的电接口与高压发生器连接,将所述喷嘴的银浆供给接口与银浆供给装置连接,所述喷嘴的打印端垂直于所述太阳能基板; Silver paste is supplied with the supply port [0020] (3.1) diameter of 500~1000 m nozzle provided in the nozzle height adjustment module, and an electrical interface connected to the nozzle and high voltage generator, the said nozzle means connected to the print end of the nozzle is perpendicular to the solar substrate;

[0021] (3.2)控制单元输出第一控制信号控制银浆供给装置给所述喷嘴的容腔内注入银浆; [0021] (3.2) control means outputs a first control signal to said paste supplying means cavity of the injection nozzle paste;

[0022] (3.3)控制单元输出第二控制信号控制喷嘴高度调节模块中滑块沿着丝杆滑动,调节喷嘴阵列高度为0.5〜Icm ; [0022] (3.3) control means outputs the second control signal the height adjustment of the nozzle module slider sliding along the screw, adjust the height of the nozzle array 0.5~Icm;

[0023] (3.4)控制单元输出第三控制信号控制高压发生器给喷嘴与吸附平台之间施加电压;电压被设置为0.8〜2kv。 [0023] (3.4) the control unit outputs a third control signal to the high voltage generator, a voltage is applied between the nozzle and the suction stage; voltage is set to 0.8~2kv.

[0024] (3.5)控制单元输出第四控制信号控制运动平台沿Y向以80〜200mm/s的速度运动,并形成第二栅电极。 [0024] (3.5) the control unit outputs a fourth control signal the movement speed of the moving platform in the Y direction to 80~200mm / s, and the second gate electrode is formed.

[0025] 更进一步地,所述第一栅电极的宽度为5μηι〜50 μ m,所述第一栅电极的高度为 [0025] Furthermore, the width of the first gate electrode is 5μηι~50 μ m, a height of the first gate electrode

0.8 μ m 〜30 μ m0 0.8 μ m ~30 μ m0

[0026] 更进一步地,两个第一栅电极之间的间距小于两个第二栅电极之间的间距。 [0026] Still further, the spacing between the two first gate electrodes is smaller than the spacing between two second gate electrodes. [0027] 本发明还提供了一种采用上述的方法制备的太阳能栅电极结构。 [0027] The present invention further provides a process for preparing a solar gate electrode structure of the above-described method used.

[0028] 总体而言,通过本发明所构思的以上技术方案与现有技术相比,由于采用电纺丝直写工艺打印太阳能电极,可通过控制不同的电压,喷嘴高度,和基板进给速度可控制打印出的栅线宽度和高度,获得宽度达微米甚至亚微米级的栅极,且具有更高的高宽比。 [0028] In general, the present invention contemplated by the above technical solutions than the prior art, since the electrospinning write printing process of a solar electrode, may be controlled by a different voltage, nozzle height, and the substrate feed rate You can print out control gate line width and height, to obtain a width of micron or even submicron gate, and having a higher aspect ratio. 其中,电压影响一定高度下泰勒锥的稳定性。 Wherein the voltage stability under the influence of a certain height Taylor cone. 高度主要通过影响栅线在空中的固化程度来影响打印栅线的高度,在其他条件不变的情况下,高度越高所打印栅线高度越高。 By affecting the height of the gate main line to affect the height of the gate line is printed in the air the degree of cure, in the case where the other conditions remain unchanged, the higher the higher the height of the height of the printed gate lines. 基板进给速度主要影响影响打印栅线的宽度,在其他条件不变的情况下,速度越大,栅线越细。 Substrate feed rate mainly affect the width of the gate line impact printing, in the case where the other conditions remain unchanged, the greater the speed, the thinner the gate line.

附图说明 BRIEF DESCRIPTION

[0029] 图1是太阳能电池栅电极的图形结构示意图; [0029] FIG. 1 is a graphical schematic structure of a solar cell gate electrode;

[0030] 图2是本发明第一实施例提供的制备太阳能电池栅电极的装置的结构示意图; [0030] FIG. 2 is a schematic view of apparatus for preparing the gate electrode of the solar cell according to a first embodiment of the present invention;

[0031] 图3是本发明实施例提供的制备太阳能电池栅电极的装置中喷嘴阵列的布局图; [0031] FIG. 3 is a layout view of apparatus for preparing a solar cell of the gate electrode according to an embodiment of the present invention, the nozzle array;

[0032] 图4是本发明第二实施例提供的制备太阳能电池栅电极的装置的结构示意图; [0032] FIG. 4 is a block diagram of a second gate electrode of the solar cell device prepared according to an embodiment of the present invention;

[0033] 图5为基板进给速度为200mm/s,喷嘴高度为15mm,电压为1.5kv时,不同喷嘴阵列的列数带来所打印栅线间距的变化;图5(a)为单行喷嘴打印的栅线间距4mm,图5(b)为两行喷嘴打印的栅线间距2mm ; When [0033] FIG. 5 is a substrate feed rate of 200mm / s, nozzle height of 15mm, a voltage of 1.5kv, bring about changes in grating pitch different from the number of columns printed nozzle array; FIG. 5 (a) is a single row of nozzles gate line printing pitch 4mm, FIG. 5 (b) two rows of nozzles of the print gate line pitch of 2mm;

[0034] 图6为喷嘴直径为150 μ m,基板进给速度为200mm/s,电压为1.5kv时,不同喷嘴高度,所打印栅线高度不同;图6(幻喷嘴高度为8mm,所打印栅线高度为15 μ m;图6(b)喷嘴高度为15mm,其栅线高度为20 μ m ; [0034] FIG. 6 is a nozzle diameter of 150 μ m, the substrate feed rate of 200mm / s, when the voltage of 1.5 kV, the height of different nozzles, the print height different from the gate line; FIG. 6 (phantom nozzle height is 8mm, printed gate line height of 15 μ m; FIG. 6 (b) is a nozzle height 15mm, a height of a gate line 20 μ m;

[0035] 图7为喷嘴直径为150 μ m,电压为1.5kv时,喷嘴高度为15mm,不同基板进给速度,所打印栅线宽度不同;图7(a)速度为150mm/s,所打印栅线宽度为48 μ m;图7(b)速度为300mm/s,其栅线宽度为30 μ m ; When [0035] FIG. 7 is a nozzle diameter of 150 μ m, voltage of 1.5 kV, nozzle height is 15mm, feed speed different substrates, different widths of the printed gate lines; FIG. 7 (a) speed of 150mm / s, printed gate line width of 48 μ m; FIG. 7 (b) speed of 300mm / s, a gate line width of 30 μ m;

[0036] 图8为基板进给速度为200mm/s,电压为1.5kv时,喷嘴高度为15mm,不同喷嘴直径,所打印栅线宽度不同;图8(&)喷嘴直径为400 μ m,所打印栅线宽度为IOOym ;图8(b)喷嘴直径为100 μ m,其栅线宽度为30 μ m。 When [0036] FIG. 8 is a substrate feed rate of 200mm / s, voltage of 1.5 kV, nozzle height is 15mm, different nozzle diameters, different widths of the printed gate lines; FIG. 8 (&) nozzle diameter of 400 μ m, the printing a line width of the gate IOOym; FIG. 8 (b) a nozzle diameter of 100 μ m, a gate line width of 30 μ m.

具体实施方式 Detailed ways

[0037] 为了使本发明的目的、技术方案及优点更加清楚明白,以下结合附图及实施例,对本发明进行进一步详细说明。 [0037] To make the objectives, technical solutions and advantages of the present invention will become more apparent hereinafter in conjunction with the accompanying drawings and embodiments of the present invention will be further described in detail. 应当理解,此处所描述的具体实施例仅仅用以解释本发明,并不用于限定本发明。 It should be understood that the specific embodiments described herein are only intended to illustrate the present invention and are not intended to limit the present invention. 此外,下面所描述的本发明各个实施方式中所涉及到的技术特征只要彼此之间未构成冲突就可以相互组合。 Moreover, various embodiments of the invention described below involved the technical features as long as no conflict with one another can be configured in combination with each other.

[0038] 图1是太阳能电池栅电极的图形,其中a为第一栅电极,b为第二栅电极。 [0038] FIG. 1 is a graph of the gate electrode of the solar cell, wherein a first gate electrode, b is a second gate electrode. 为提高电池转换效率,应使所得栅电极既能够减小遮光面积,又能够降低电池的串联电阻。 In order to improve the conversion efficiency of the battery, such that the resulting gate electrode can be reduced both the light shielding area, but also to reduce the series resistance of the battery. 减小遮光面积就要求栅电极宽度尽量小,降低电池的串联电阻就要求栅电极截面尽量大。 Reducing the shielding area of ​​the gate electrode would require a width as small as possible to reduce the series resistance of the cell requires a sectional gate electrode as large as possible. 传统的制备方法采用丝网印刷工艺,如前所述,该工艺在印刷栅线电极宽度小时不能保证其高宽比,栅电极宽度通常在80微米以上,高度为5〜30微米。 Prepared by conventional methods using a screen printing process, as described above, the printing process in the gate line electrode width h can not guarantee its high aspect ratio, the gate electrode width is usually at least 80 microns, a height of 5~30 micrometers. 本发明实施例结合电流体动力喷印的原理,采用电纺丝直写栅线电极的方法,可获得更细的栅电极,且具有更大的高宽比。 Example binding principle electrohydrodynamic printing embodiment of the present invention, a method for electrospinning write gate line electrode, the gate electrode can be obtained finer, and has a greater aspect ratio. 本发明实施例中,第一栅电极宽度在5〜50 μ m,高度在0.8〜30 μ m。 Embodiment of the present invention, the width of the first gate electrode 5~50 μ m, the height of 0.8~30 μ m. 当第一栅电极宽度在数个微米时,可使光发生衍射,从而减小了阴影面积,提高转换效率。 When the width of the first gate electrode in a few microns, can diffracted light occurs, thereby reducing the shaded area, to improve the conversion efficiency. [0039] 图2是本发明实施例提供的制备太阳能电池栅电极的装置的结构示意图,包括:银浆供给装置1,喷嘴高度调节模块2,喷嘴3,可程控的高压发生器4,吸附平台5,运动平台6,太阳能基板7,控制单元8。 [0039] FIG. 2 is a schematic structural diagram of manufacturing a solar cell provided in the gate electrode of the embodiment of the present invention apparatus, comprising: a paste supply apparatus, the nozzle height adjustment module 2, a nozzle 3, a programmable voltage generator 4, the suction stage 5, motion platform 6, solar substrate 7, the control unit 8. 银浆供给装置I为喷嘴3供给银浆,并提供电纺丝所需的背压。 I paste supplying means supplying nozzle 3 silver paste, and to provide the desired backpressure electrical spinning. 喷嘴高度调节模块2用于精确调节喷嘴3的高度。 2 nozzle height adjustment module for adjusting the height of the nozzle 3 is accurately. 喷嘴3的高度定义为喷印打印端距离待打印太阳能电池的距离。 3 the nozzle height is defined as the distance from the solar cell to be printed from the printing end of the print. 喷嘴3为完成打印栅电极的直接执行元件,包括打印端,银浆供给接口和电接口。 To complete the nozzle 3 directly execute the printing elements of the gate electrode, it includes a print side silver paste supply and electrical interfaces. 喷嘴3要镀上金属,用于建立电场。 Plated metal to the nozzle 3, for establishing an electric field. 喷嘴3的作用在于:作为高压电场的正极,使银浆在喷嘴前端,即打印端形成泰勒锥,并进一步拉扯出丝。 3 in that a nozzle effect: as a positive high voltage electric field, so that the silver paste at the tip of the nozzle, i.e., print end Taylor cone is formed, and further pulling out the wire. 高压发生器4用于在喷嘴3和基板间加上高压。 4 for the high-voltage generator 3 and the substrate between the nozzle high voltage is applied. 高压发生器4连接控制单元8,可在电脑终端对电压进行方便调节。 The high voltage generator 4 is connected to the control unit 8, the voltage can be easily adjusted to the computer terminal. 吸附平台5用于吸附固定待打印的太阳能基板7。 Adsorption fixed internet 5 for adsorbing the solar substrate 7 to be printed. 运动平台6用于带动太阳能基板7做直线运动,以完成栅电极图形打印。 A solar motion platform 6 is used for driving the linear motion of the substrate 7, a gate electrode pattern to perform printing. 配合控制单元可完成期望栅电极图形的打印。 The control unit may be accomplished with a desired printing pattern of the gate electrode. 控制单元8,由控制卡和工控机组成,使整个系统可通过电脑界面,实时程控电压,高度,速度等工艺参数,实现打印栅线的可数控。 The control unit 8, the control card and the composition of IPC, the entire system may be computer interface by the process parameters, the programming voltage in real time, altitude, speed, etc., enables the printing of the gate lines can NC.

[0040] 银浆供给装置I可以由精密流量泵构成,也可以由储存银浆的容器和精密气压控制阀构成。 [0040] The paste supplying apparatus I may be formed by precision flow pump, silver paste can also be controlled from the storage container and precision pneumatic valve. 其中银浆供给装置I的输出控制端连接于喷嘴3的银浆供给接口。 Wherein the output control terminal I paste supply device is connected to a paste supply port 3 of the nozzle. 银浆供给装置I的输入控制端电气连接于控制单元8。 Electrical control input terminal I paste supplying means connected to the control unit 8.

[0041] 喷嘴高度调节模块2包括电机、滑块和丝杆。 [0041] The nozzle height adjustment module 2 includes a motor, a slider and screw. 喷嘴3固定连接与滑块上。 3 is fixedly connected to a nozzle slider. 由控制单元8控制电机带动丝杆和滑块运动。 A control motor driven screw and movement of the slider 8 by the control unit.

[0042] 喷嘴3可以为单个喷嘴,也可以为多个阵列排布的喷嘴,如图3所示。 [0042] The nozzle 3 may be a single nozzle, may be a plurality of nozzles arranged in an array, as shown in FIG. 原则上,单个喷嘴即可达到提高转换效率的目的,且结构简单。 In principle, a single nozzle can achieve the purpose of improving conversion efficiency and a simple structure. 但单喷嘴存在,需要多次打印,打印效率低。 However, the presence of a single nozzle, requires multiple printing, printing efficiency is low. 多个阵列排布的喷嘴则可以单次完成打印栅电极,效率高。 A plurality of nozzles arranged in an array may be a single complete print gate electrode, a high efficiency. 喷嘴前端为打印端,其与太阳能基板7间的距离为我们需控制的工艺参数——高度。 Print nozzle tip end, its distance from the substrate 7 Solar we need to control the process parameters - height. 所述喷嘴为金属喷嘴或前端镀有金属。 The front end of the nozzle is a nozzle or a metal plated with a metal. 所述喷嘴需留有电接口,并与高压发生器正极相连。 The left nozzle for an electrical interface, and is connected to the positive electrode and the high voltage generator. 所述喷嘴的银浆供给接口为银浆输入端,与银浆供给装置相连。 The silver paste supply nozzle interface input connected to the silver paste supply apparatus.

[0043] 高压发生器4为所有满足输出电压包含O-2.5KV,时漂<0.1%/11,温漂<0.1%/°C,且可终端远程控制,即计算机编程控制的高压发生器都可。 [0043] The high voltage generator 4 to meet the output voltage comprises all O-2.5KV, when the drift <0.1% / 11, temperature drift <0.1% / ° C, and the terminal may be remotely controlled, i.e., the high voltage generator are controlled by a computer programmed can. 例如型号为DW-P503-1AC东文高压发生器。 E.g. Model DW-P503-1AC Dongwen high voltage generator. 所述高压发生器控制端电气连接于控制单元。 The high voltage generator electrically connected to the control terminal of the control unit.

[0044] 吸附平台5固定连接与运动平台6。 [0044] 5 is fixedly connected to the suction stage motion platform 6. 所述吸附平台应留有电气接口,以接高压发生器的负极。 The suction stage electrical interface should be left to the high voltage generator connected to the negative electrode. 作为进一步的优化,在吸附平台5与打印的电池片间设置一介电常数和厚度恰当的绝缘层。 As a further optimization, provided a proper thickness and dielectric constant of the insulating layer between the cell sheet 5 and the suction stage of printing. 以避免打印银栅线时,造成电池片的击穿。 When printing in order to avoid the silver gate lines, resulting in a breakdown of the battery plate. 所述绝缘层的设置不能影响吸附平台的工作。 The insulating layer can not affect the work platform adsorption.

[0045] 运动平台6为普通可以实现XY两向运动的平台。 [0045] motion platform 6 can be implemented as an ordinary XY movement of the two platforms. 作为优选方案,运动平台的重复定位精度小于5 μ m为佳。 As a preferred embodiment, repeatability motion platform preferably less than 5 μ m. 所述运动平台与控制单元8为电气连接。 The motion platform and electrically connected to the control unit 8.

[0046] 太阳能基板7可以为普通未打印栅电极的太阳能基板7。 [0046] The substrate 7 Solar solar substrate may be an ordinary gate electrode 7 unprinted. 太阳能基板7吸附固定于吸附平台5上。 Adsorbed and fixed to the substrate 7 Solar adsorption platform 5.

[0047] 控制单元8可为所有能满足上述目的的控制系统。 [0047] The control unit 8 and the control system can meet all purposes. 例如运动控制卡+工控机。 For example, the motion control card + IPC.

[0048] 在本发明实施例中,当打印的太阳能电池为柔性薄膜太阳能电池时,由卷到卷装置代替运动平台完成带打印太阳能电池的进给。 [0048] In an embodiment of the present invention, when printing a flexible thin film solar cell of the solar cell, completed by the roll-to-tape printing apparatus instead of the motion platform of the solar cell feed. 采用卷到卷的进给方式打印,提高生产效率。 Using feed roll to roll printing mode, improve production efficiency. 此时,连续打印栅线。 In this case, the gate line continuous printing. 运动平台和吸附平台均不工作,但要保证吸附平台接上高压发生器的负极。 Motion platform and adsorption platforms do not work, but to ensure adsorption platform connected to the negative high voltage generator. 如图4所示,卷到卷装置9包括放料辊90,进给辊91,收料辊92组成。 As shown, roll to roll apparatus 49 includes a discharge roller 90, feed roller 91, roller 92 receiving the composition. 此时,待打印栅电极的柔性太阳能卷放置于放料辊90上。 In this case, the gate electrode is to be printed is placed in a flexible solar volume discharge roller 90. 卷到卷装置9与控制单元8电气连接。 9 reel to reel means electrically connected to the control unit 8. 通过控制单元8控制进给棍91的速度带动柔性太阳能薄膜从放料棍90向收料棍92运动,在喷嘴3处完成打印栅电极。 By the control unit 8 controls the feeding speed of the rod 91 is driven by a flexible thin-film solar stick 90 from the discharge 92 to the receipt stick movement, to complete the printing of the nozzle 3 at the gate electrode. 打印栅电极后的太阳能电池由收料辊92卷起。 After printing the gate electrode of the solar cell by the rolling up roller 92. 期间,运动平台和吸附平台均不工作,但要保证吸附平台接上高压发生器的负极。 During motion platform and adsorption platforms do not work, but to ensure adsorption platform connected to the negative high voltage generator. 该方法可以实现连续不停地打印栅线,即柔性太阳能电池的连续制造,提高生产效率。 The method may be implemented continuously keep the gate line printing, i.e. the continuous manufacture of flexible solar cells, improve production efficiency.

[0049] 在本发明实施例中,图5为基板进给速度为200mm/s,喷嘴高度为15_,电压为 [0049] In an embodiment of the present invention, FIG 5 is a substrate feed rate of 200mm / s, the height of the nozzle 15_, voltage

1.5kv时,不同喷嘴阵列的列数带来所打印栅线间距的变化;图5(a)为单行喷嘴打印的栅线间距4mm,图5(b)为两行喷嘴打印的栅线间距2mm ;可以通过增加喷嘴阵列的列数来减小打印栅线的间距。 When 1.5kv, bring about changes in the gate line spacing of printed columns of different nozzle arrays; gate lines in FIG. 5 (a) is a single row of nozzles of the print pitch 4mm, FIG. 5 (b) two rows of nozzles of the print gate line pitch of 2mm ; print pitch may be reduced by the gate lines increase in number of columns in the nozzle array. 图6为喷嘴直径为150 μ m,基板进给速度为200mm/s,电压为1.5kv时,不同喷嘴高度,所打印栅线高度不同;图6(幻喷嘴高度为8mm,所打印栅线高度为15μπι;图6(b)喷嘴高度为15mm,其栅线高度为20 μ m ;在其他条件相同的情况下,增加喷嘴高度,打印栅线的高度增加,从而增加了高宽比。图7为喷嘴直径为150 μ m,电压为1.5kv时,喷嘴高度为15mm,不同基板进给速度,所打印栅线宽度不同;图7(a)速度为150mm/s,所打印栅线宽度为48 μ m;图7(b)速度为300mm/s,其栅线宽度为30 μ m ;为在其他条件相同的情况下,增加打印电池基板的速度,所打印栅线宽度减小;图8为基板进给速度为200mm/s,电压为1.5kv时,喷嘴高度为15_,不同喷嘴直径,所打印栅线宽度不同;图8(a)喷嘴直径为400 μ m,所打印栅线宽度为100 μ m ;图8 (b)喷嘴直径为100 μ m,其栅线宽度为30 μ m ;在其他条件相同的情况 FIG 6 is a nozzle diameter of 150 μ m, the substrate feed rate of 200mm / s, when the voltage of 1.5 kV, the height of different nozzles, the print height different from the gate line; FIG. 6 (phantom nozzle height of 8mm, a height of the gate line printing It is 15μπι; FIG. 6 (b) a nozzle height of 15mm, a gate line height of 20 μ m; under the same other conditions, increasing nozzle height, the height increase the printing gate line, thereby increasing the aspect ratio of FIG. when the nozzle diameter is 150 μ m, voltage of 1.5 kV, nozzle height is 15mm, different substrate feed rate, the printed gate lines of different widths; FIG. 7 (a) speed of 150mm / s, the width of the printed gate lines 48 μ m; FIG. 7 (b) speed of 300mm / s, a gate line width of 30 μ m; is reduced under the same other conditions, increasing the speed of the printing cell substrate, a gate line width of the printing; FIG. 8 is a the substrate feed rate is 200mm / s, voltage of 1.5 kV, nozzle height 15_, different nozzle diameter, the printed line widths different gate; FIG. 8 (a) nozzle diameter of 400 μ m, a width of the gate line 100 is printed μ m; FIG. 8 (b) a nozzle diameter of 100 μ m, a gate line width of 30 μ m; the other conditions being the same ,增加喷嘴高度,打印栅线的高度增加,从而增加了高宽比。 , Nozzle height increases, increasing the height of the gate line printing, thereby increasing the aspect ratio.

[0050] 本发明实施例中,采用上述设备制备的太阳能栅电极的栅线宽度最小接近亚微米尺度,使得可见光中的很多波长的光能够发生衍射,减小阴影面积。 [0050] The embodiments of the present invention, the gate line width of the gate electrode of the solar prepared using the apparatus of the minimum approach sub-micron scale, so that a lot of light in the visible wavelength can be diffracted, the shaded area is reduced. 且具有大的高宽比。 And having a high aspect ratio. 从而提闻了太阳能电池的效率。 Wen thereby improving the efficiency of the solar cell.

[0051] 本发明实施例还提出了一种利用静电纺丝工艺直写太阳能电池栅电极的方法,所述方法具体为: [0051] Example embodiments of the present invention also provides a method for electrospinning process using a direct-write gate electrode of a solar cell, the method specifically comprises:

[0052] (I)将太阳能基板7设置于吸附平台上; [0052] (I) the solar substrate 7 disposed on the suction stage;

[0053] (2)制备第一栅电极: [0053] (2) Preparation of the first gate electrode:

[0054] (2.1)将直径为100〜400微米的喷嘴3设置于喷嘴高度调节模块2上,并将所述喷嘴3的电接口与高压发生器4连接,将喷嘴3的银浆供给接口与I连接,喷嘴3的打印端垂直于基板; [0054] (2.1) diameter of 100~400 m 3 provided in the nozzle a nozzle height adjusting module 2, and 3 of the nozzle and an electrical interface connected to a high voltage generator 4, supplying the silver paste with the nozzle 3 interface I is connected, the printing end of the nozzle 3 is perpendicular to the substrate;

[0055] (2.2)控制单元8输出第一控制信号控制银浆供给装置I给所述喷嘴3的容腔内注入银浆; [0055] (2.2) the control unit 8 outputs a first control signal to said paste supplying means I injection nozzle 3 cavity of silver paste;

[0056] (2.3)控制单元8输出第二控制信号控制喷嘴高度调节模块2中滑块沿着丝杆滑动,调节喷嘴3阵列高度为0.5〜2cm ; [0056] (2.3) the control unit 8 outputs a second control signal nozzle height adjustment module slider 2 slides along the screw, adjust the height of the array of nozzles 3 0.5~2cm;

[0057] (2.4)控制单元8输出第三控制信号控制高压发生器4给喷嘴3与吸附平台5之间施加电压;电压被设置为0.8〜2kv。 [0057] (2.4) the control unit 8 outputs a third control signal to the high voltage generator 4 and the suction nozzle 3 voltage is applied between the platform 5; voltage is set to 0.8~2kv.

[0058] (2.5)控制单元8输出第四控制信号控制运动平台沿X向以150〜300mm/s的速度运动,并形成第一栅电极; [0058] (2.5) the control unit 8 outputs a fourth control signal in the X direction to the motion platform 150~300mm / s motion speed, and forming a first gate electrode;

[0059] (3)制备第二栅电极 [0059] (3) Preparation of the second gate electrode

[0060] (3.1)将直径为500〜1000微米的喷嘴3设置于喷嘴高度调节模块2上,并将所述喷嘴3的电接口与高压发生器4连接,将所述喷嘴3的银浆供给接口与银浆供给装置I连接,喷嘴3的打印端垂直于基板; [0060] (3.1) diameter of 500~1000 m 3 provided in the nozzle a nozzle height adjusting module 2, and 3 of the nozzle and an electrical interface connected to a high voltage generator 4, the paste supplied to the nozzle 3 I paste supply device and the interface is connected to the nozzle 3 side is perpendicular to the print substrate;

[0061] (3.2)控制单元8输出第一控制信号控制银浆供给装置I给喷嘴3的容腔内注入银浆; [0061] (3.2) the control unit 8 outputs a first control signal I paste supply means to the nozzle 3 of the injection cavity of silver paste;

[0062] (3.3)控制单元8输出第二控制信号控制喷嘴高度调节模块2中滑块沿着丝杆滑动,调节喷嘴阵列高度为0.5〜Icm ; [0062] (3.3) the control unit 8 outputs a second control signal nozzle height adjustment module slider 2 slides along the screw, adjust the height of the nozzle array 0.5~Icm;

[0063] (3.4)控制单元8输出第三控制信号控制高压发生器4给喷嘴与5之间施加电压;电压被设置为0.8〜2kv。 [0063] (3.4) the control unit 8 outputs a third control signal to the high voltage generator 4 applies a voltage between the nozzle and 5; voltage is set to 0.8~2kv.

[0064] (3.5)控制单元8输出第四控制信号控制运动平台6沿Y向以80〜200mm/s的速度运动,并形成第二栅电极。 [0064] (3.5) the control unit 8 outputs a fourth control signal in the Y-direction moving table 6 speed 80~200mm / s motion, and the second gate electrode is formed.

[0065] 其中,第二栅电极的宽度大于第一栅电极的宽度,两个第一栅电极之间的间距小于两个第二栅电极之间的间距。 [0065] wherein the width of the second gate electrode is greater than a width of the first gate electrode, the spacing between the two first gate electrodes is smaller than the distance between the two second gate electrodes.

[0066] 在本发明实施例中,控制单元8包括运动控制卡和工控机,可以实现输出第一控制信号控制银浆供给装置I给喷嘴3的容腔内注入银浆;输出第二控制信号控制喷嘴高度调节模块2中滑块沿着丝杆滑动,输出第三控制信号控制高压发生器4给喷嘴与5之间施加电压;输出第四控制信号控制运动平台6沿X向或Y向以一定的速度运动。 [0066] In an embodiment of the present invention, the control unit 8 comprises a motion control card and IPC, a first output can be achieved paste supply means control signal I to the cavity of the injection nozzle 3 silver paste; outputting a second control signal controlling the nozzle height adjustment module slide along the screw in the slider 2, the output of the third control signal to the high voltage generator 4 applies a voltage between the nozzle and 5; the fourth control signal output motion platform 6 along the X or Y directions to a certain speed.

[0067] 本发明实施例提供的制备太阳能电池背电极的方法利用电纺丝直写工艺打印太阳能电极。 Preparing a solar cell according to an embodiment of the [0067] method of the present invention, the back electrode by an electrospinning process to print solar write electrode. 电纺丝工艺利用电场将喷嘴中的银浆拉成直径比喷嘴直径小的丝。 The electrospinning process uses an electric field to pull the nozzle diameter of the nozzle paste smaller diameter than the wire. 通过控制不同的电压,喷嘴高度,和基板进给速度可控制打印出的栅线宽度和高度。 By controlling the different voltages, nozzle height, and the substrate feed rate can be controlled to print out the gate line width and height. 其中,电压影响一定高度下泰勒锥的稳定性。 Wherein the voltage stability under the influence of a certain height Taylor cone. 高度主要通过影响栅线在空中的固化程度来影响打印栅线的高度,在其他条件不变的情况下,高度越高所打印栅线高度越高。 By affecting the height of the gate main line to affect the height of the gate line is printed in the air the degree of cure, in the case where the other conditions remain unchanged, the higher the higher the height of the height of the printed gate lines. 基板进给速度主要影响影响打印栅线的宽度,在其他条件不变的情况下,速度越大,栅线越细。 Substrate feed rate mainly affect the width of the gate line impact printing, in the case where the other conditions remain unchanged, the greater the speed, the thinner the gate line.

[0068] 本发明实施例提供的方法与传统丝网印刷方法相比,可打印更细的栅线,且可达到更大的高宽比,更节省银浆,可数控打印栅线的宽度和高度。 [0068] The method provided by the embodiments of the present invention compared to the conventional screen printing method, print finer lines gate, and can achieve greater aspect ratio, more economical silver paste, and the width of the printed gate lines NC height. 作为优化方法,采用喷嘴阵列单次完成栅电极印刷,提高了生产效率。 As an optimization method using a single nozzle array gate electrode printing is completed, improve production efficiency.

[0069] 本发明中,采用上述的方法制备的太阳能栅电极结构,栅线宽度最小接近亚微米尺度,使得可见光中的很多波长的光能够发生衍射,减小阴影面积。 [0069] In the present invention, the use of solar gate electrode structure prepared by the above method, the minimum line width of the gate near the sub-micron scale, so that a lot of light in the visible wavelength can be diffracted, the shaded area is reduced. 且所述栅线具有大的高宽比。 And the gate line having a large aspect ratio. 提高了太阳能电池的效率。 Improve the efficiency of solar cells.

[0070] 为了进一步具体解释说明本发明,以下给出了四个实施例,由于打印太阳能背电极主栅线与细栅线工艺一样,故实施例中只针对细栅线(即第一栅电极)的打印进行了说明。 [0070] In order to illustrate the invention in further detail, the following four embodiments given, since the print solar back electrode bus bar and the thin line process as the gate, so only for example thin gate lines (i.e., the first gate electrode ) printing is described.

[0071] 实施例1:现要打印一个边长为125mm,对角为165mm的n+p型单晶硅太阳电池的上电极,电极材料为银浆,其体电阻率为3.0u Ω.cm,根据太阳电池栅极优化理论和工艺上的限制,计算出要求细栅线的间距控制在2.5mm左右,高度控制在10_30um之间。 [0071] Example 1: We now want to print a side length of 125mm, 165mm diagonal to the upper electrode of the p-type n + monocrystalline silicon solar cell, the electrode material is silver, which is a volume resistivity of 3.0u Ω.cm the constraints on optimization theory and technology solar gate, calculates the required fine pitch of the control gate lines is about 2.5mm, the height control between 10_30um. 进一步的,采用阵列喷嘴,提高生产效率。 Further, the use of an array of nozzles, improve production efficiency.

[0072] 具体步骤如下: [0072] The specific steps are as follows:

[0073] (I)喷嘴阵列采用两行布局,等间距放置,每行有25个喷嘴,且喷嘴间的距离设置成5mm,喷嘴直径选用200um,这样打印出来的理论细栅线间距为2.5mm,而且喷嘴能打印的宽度和电池片宽度相等,单次打印即可完成细栅的打印。 [0073] (I) using two rows of nozzle array arrangement, are placed at equal intervals, each nozzle row 25, and the distance between the nozzles arranged 5mm, the diameter of the nozzle selection 200um, fine grating pitch such as 2.5mm printed theory and the width and cell width of the nozzle can print sheets is equal, to print a single fine grid complete the printing.

[0074] (2)将待打印栅线的太阳能电池片放在吸附平台上,吸附好。 [0074] (2) gate line to be printed solar cells placed on the suction stage, good adsorption. [0075] (3)将所要打印的银浆加入喷嘴的容腔内,充满金属喷头。 [0075] (3) The addition of silver paste to be printed cavity of the nozzle, the nozzle is full of metal. 并将喷嘴与高压发生器正极相连,并将电压设置为IkV ; And a nozzle connected to the positive electrode and the high voltage generator, and voltage to IKV;

[0076] (4)调节喷嘴阵列高度,将高度设置为Icm ; [0076] (4) adjusting the height of the array of nozzles, the height to Icm of;

[0077] (5)设置运动平台X向运动速度为300mm/s ; [0077] (5) provided motion velocity of the platform X 300mm / s;

[0078] (6)开始打印,利用Keyence共聚焦显微镜测得细栅极高度为15um,宽度为30um,达到理想效果,完成打印。 [0078] (6) to start printing, using the Keyence confocal microscopy thin gate height is measured 15um, a width of 30um, achieve the desired effect, printing is completed.

[0079] 实施例2:在实施例1的基础之上将细栅极的高度控制在15-20um之间,重新设置参数如下: [0079] Example 2: fine control gate height between 15-20um, re-set the following parameters on the basis of Example 1 above:

[0080] (I)喷嘴阵列采用两行布局,等间距放置,每行有25个喷嘴,且喷嘴间的距离设置成5mm,喷嘴直径选用300um,这样打印出来的理论细栅线间距为2.5mm,而且喷嘴能打印的宽度和电池片宽度相等,单次打印即可完成细栅的打印。 [0080] (I) using two rows of nozzle array arrangement, are placed at equal intervals, each nozzle row 25, and the distance between the nozzles arranged 5mm, the diameter of the nozzle selection 300um, fine grating pitch such as 2.5mm printed theory and the width and cell width of the nozzle can print sheets is equal, to print a single fine grid complete the printing.

[0081] (2)将待打印栅线的太阳能电池片放在吸附平台上,吸附好。 [0081] (2) gate line to be printed solar cells placed on the suction stage, good adsorption.

[0082] (3)将所要打印的银浆加入喷嘴的容腔内,充满金属喷头。 [0082] (3) The addition of silver paste to be printed cavity of the nozzle, the nozzle is full of metal. 并将喷嘴与高压发生器正极相连,并将电压设置为1.5kV ; And a nozzle connected to the positive electrode and the high voltage generator, and a voltage setting of 1.5 kV;

[0083] (4)调节喷嘴阵列高度,将高度设置为1.5cm ; [0083] (4) adjusting the height of the array of nozzles, the height is set to 1.5cm;

[0084] (5)设置运动平台X向运动速度为250mm/s ; [0084] (5) provided motion velocity of the platform X 250mm / s;

[0085] (6)开始打印。 [0085] (6) to start printing. 利用Keyence共聚焦显微镜测得细栅极高度为18um,宽度为35um,达到理想效果,完成打印。 Keyence confocal microscopy using thin gate height is measured 18um, a width of 35um, achieve the desired effect, printing is completed.

[0086] 实施例3:现要打印一块20mmX 20mm的n+p型单晶硅太阳电池的上电极,电极材料为银浆,其体电阻率为3.0u Ω.cm,根据太阳电池栅极优化理论和工艺上的限制,计算出要求细栅线的间距控制在2mm左右,高度控制在20-30um之间。 [0086] Example 3: 20mmX 20mm now to print an electrode on the n + p-type single crystal silicon solar cell, the electrode material is silver, which is a volume resistivity of 3.0u Ω.cm, optimized solar cell according to the gate theory and technology constraints, to calculate the required fine pitch of the control gate lines about 2mm, height control between 20-30um.

[0087] 具体步骤如下: [0087] The specific steps are as follows:

[0088] (I)喷嘴阵列采用单行布局,共10个喷嘴,等间距放置,且喷嘴间的距离设置成2mm,喷嘴直径选用400um,这样打印出来的理论细栅线间距为2mm,而且喷嘴能打印的宽度和电池片宽度相等,单次打印即可完成细栅的打印。 [0088] (I) nozzle arrays using one-way layout, a total of 10 nozzles equidistantly placed, and the distance between the nozzles arranged to 2mm, a fine grating pitch diameter of the nozzle selection 400um, such printed theory 2mm, and the nozzle can of equal width and the width of the printing sheet batteries, print a single fine grid to complete the printing.

[0089] (2)将待打印栅线的太阳能电池片放在吸附平台上,吸附好。 [0089] (2) gate line to be printed solar cells placed on the suction stage, good adsorption.

[0090] (3)将所要打印的银浆加入喷嘴的容腔内,充满金属喷头。 [0090] (3) The addition of silver paste to be printed cavity of the nozzle, the nozzle is full of metal. 并将喷嘴与高压发生器正极相连,为保证细栅线尽量细,将电压设置为0.SkV ; And a nozzle connected to the positive electrode and the high voltage generator, in order to ensure as far as possible thin thin gate lines, setting the voltage 0.SkV;

[0091] (4)调节喷嘴阵列高度,将高度设置为0.5cm ; [0091] (4) adjusting the height of the array of nozzles, the height is set to 0.5cm;

[0092] (5)设置运动平台X向运动速度为200mm/s ; [0092] (5) provided motion velocity of the platform X 200mm / s;

[0093] (6)开始打印。 [0093] (6) to start printing. 利用Keyence共聚焦显微镜观察打印好的太阳能电池栅极间距和厚度,测得细栅极间距为2.1mm,宽度为43um,高度为21um,符合预设范围20_30um。 Keyence confocal microscopy using a printed solar cell gate pitch and thickness, measured as a fine gate pitch 2.1mm, a width of 43um, a height of 21um, meet the predetermined range 20_30um. 打印成功。 Print success.

[0094] 实施例4:在实施例3的基础上,改变喷嘴高度和电压,观察太阳能电池细栅极参数的变化。 [0094] Example 4: On the basis of Example 3, the nozzle height and the voltage change, the fine gate observe the solar cell parameters. 具体步骤如下: Specific steps are as follows:

[0095] (I)喷嘴阵列采用单行布局,共10个喷嘴,等间距放置,且喷嘴间的距离设置成2mm,喷嘴直径选用lOOum,这样打印出来的理论细栅线间距为2mm,而且喷嘴能打印的宽度和电池片宽度相等,单次打印即可完成细栅的打印。 [0095] (I) nozzle arrays using one-way layout, a total of 10 nozzles equidistantly placed, and the distance between the nozzles arranged 2mm, diameter of the nozzle selection lOOum, such printed thin gate line theory spacing of 2mm, and the nozzle can of equal width and the width of the printing sheet batteries, print a single fine grid to complete the printing.

[0096] (2)将待打印栅线的太阳能电池片放在吸附平台上,吸附好。 [0096] (2) gate line to be printed solar cells placed on the suction stage, good adsorption. [0097] (3)将所要打印的银浆加入喷嘴的容腔内,充满金属喷头。 [0097] (3) The addition of silver paste to be printed cavity of the nozzle, the nozzle is full of metal. 并将喷嘴与高压发生器正极相连,为保证细栅线尽量细,将电压设置为2kV ; And a nozzle connected to the positive electrode and the high voltage generator, in order to ensure as far as possible thin thin gate lines, setting the voltage 2kV;

[0098] (4)调节喷嘴阵列高度,将高度设置为2cm ; [0098] (4) adjusting the height of the array of nozzles, the height is set to 2cm;

[0099] (5)设置运动平台X向运动速度为150mm/s ; [0099] (5) provided motion velocity of the platform X 150mm / s;

[0100] (6)开始打印。 [0100] (6) to start printing. 利用Keyence共聚焦显微镜观察打印好的太阳能电池栅极间距和厚度,发现细栅极间距为2.1mm,高度为28um,比实施例3中的高度略有增高,且栅线宽度变细,为27um。 Keyence confocal microscopy using a printed solar cell gate pitch and thickness, gate pitch is found that the fine 2.1mm, a height of 28um, than the height in Example 3 increased slightly, and the gate line width becomes fine, of 27um .

[0101] 为了叙述简洁,实施例1-4中主栅线(即第二栅电极)的数据如下表一所示: [0101] For simple description, bus bars Example 1-4 embodiment (i.e., the second gate electrode) of the data shown in Table I below:

Figure CN103456835AD00111

[0103]表一 [0103] Table I

[0104] 本发明提供的制备太阳能电池背电极的方法利用电纺丝直写工艺打印太阳能电极。 [0104] The method of preparing a solar cell of the present invention provides a back electrode of the direct writing by an electrospinning process to print solar electrodes. 电纺丝工艺利用电场将喷嘴中的银浆拉成直径比喷嘴直径小的丝。 The electrospinning process uses an electric field to pull the nozzle diameter of the nozzle paste smaller diameter than the wire. 通过控制不同的电压,喷嘴高度,和基板进给速度可控制打印出的栅线宽度和高度。 By controlling the different voltages, nozzle height, and the substrate feed rate can be controlled to print out the gate line width and height. 其中,电压影响一定高度下泰勒锥的稳定性。 Wherein the voltage stability under the influence of a certain height Taylor cone. 高度主要通过影响栅线在空中的固化程度来影响打印栅线的高度,在其他条件不变的情况下,高度越高所打印栅线高度越高。 By affecting the height of the gate main line to affect the height of the gate line is printed in the air the degree of cure, in the case where the other conditions remain unchanged, the higher the higher the height of the height of the printed gate lines. 基板进给速度主要影响影响打印栅线的宽度,在其他条件不变的情况下,速度越大,栅线越细。 Substrate feed rate mainly affect the width of the gate line impact printing, in the case where the other conditions remain unchanged, the greater the speed, the thinner the gate line.

[0105] 本领域的技术人员容易理解,以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 [0105] Those skilled in the art will readily appreciate, the above-described preferred embodiment of the present invention only but are not intended to limit the present invention, any modifications within the spirit and principle of the present invention, equivalent substitutions, and improvements, etc., should be included within the scope of the present invention.

Claims (9)

1.一种制备太阳能电池栅电极的装置,其特征在于,包括银浆供给装置(I),喷嘴高度调节模块(2),喷嘴(3),可程控的高压发生器(4),吸附平台(5),运动平台(6)和控制单元(8); 所述喷嘴(3)包括打印端,银浆供给接口和电接口; 所述银浆供给装置(I)的输入控制端与控制单元(8)连接,银浆供给装置(I)的输出控制端与喷嘴(3)的银浆供给接口连接,所述银浆供给装置(I)用于在所述控制单元的控制下为所述喷嘴(3)提供银浆和为电纺丝提供所需的背压; 喷嘴高度调节模块(2)的一端连接控制单元(8),喷嘴高度调节模块(2)的另一端连接喷嘴(3),所述喷嘴高度调节模块(2)用于在所述控制单元的控制下调节所述喷嘴(3)的喷印打印端与太阳能基板(7)之间的高度; 所述高压发生器(4)的输出正端连接至所述喷嘴(3)的电接口,所述高压发生器(4)的输出负端连接所述吸附平台(5), 1. A process for preparing a solar cell apparatus of the gate electrode, wherein the supply means comprises paste (the I), nozzle height adjustment module (2), a nozzle (3), the programmable voltage generator (4), the suction stage (5), moving the platform (6) and a control unit (8); said nozzle (3) comprises a printer side silver paste supply and electrical interfaces; input control terminal of the paste feed means (I) and the control unit (8), silver paste supplying means supply interface (I) with the nozzle of the output control terminal (3) of said paste supplying means (I) for the control unit under the control of the a nozzle (3) providing a silver paste and provide the desired back pressure electrospinning; nozzle height adjustment end of the module (2) is connected to the control unit (8), the other end of the height adjustment of the nozzle module (2) is connected to the nozzle (3) the nozzle height adjustment module (2) for printing print height between the end of the solar substrate (7) adjusting the nozzle under the control of the control unit (3); said high voltage generator (4 ) positive output terminal connected to the nozzle (3) of the electrical interface, the output of said high voltage generator (4) is connected to the negative terminal of the suction platform (5), 述高压发生器(4)的输入控制端连接至所述控制单元(8),所述高压发生器(4)用于在所述控制单元的控制下,在所述喷嘴和吸附于吸附平台(5)上的基板之间施加电压,形成高压电场,使得银浆在所述喷嘴的打印端形成泰勒锥,并在高压电场的作用下进一步拉扯出丝; 所述运动平台(6)的控制端连接至所述控制单元(8),所述吸附平台(5)设置于所述运动平台(6)上,所述运动平台(6)用于在所述控制单元(8)的控制下,带动吸附于吸附平台(5)上的基板做直线运动,完成栅电极图形打印。 Said high voltage generator (4) a control input terminal connected to the control unit (8), said high voltage generator (4) under control of the control unit, and the suction nozzle in the suction stage ( voltage is applied between the substrate 5), high voltage electric field is formed, so that the print paste is formed at an end of the Taylor cone nozzle, and further pulling out the yarn under the effect of high voltage field; a control terminal of the motion platform (6) connected to the control unit (8), the suction platform (5) provided on the moving platform (6), the moving platform (6) under control of the control unit (8), drive internet attracted to the attraction of the substrate (5) on the linear motion, the gate electrode pattern printing is completed.
2.如权利要求1所述的装置,其特征在于,所述喷嘴(3)为单个喷嘴或多个阵列排布的喷嘴。 2. The apparatus according to claim 1, characterized in that the nozzle (3) is a single nozzle or plurality of nozzles arranged in an array.
3.如权利要求1所述的装置,其特征在于,还包括:设置于吸附平台与太阳能基板(7)之间的绝缘层。 The apparatus as claimed in claim 1, characterized in that, further comprising: an insulating layer disposed on the adsorbent between the platform and the solar substrate (7).
4.如权利要求1所述的装置,其特征在于,还包括:设置于所述吸附平台上方的卷到卷>jU ρςα装直。 4. The apparatus according to claim 1, characterized in that, further comprising: setting the volume of said suction roll to the upper platform> jU ρςα fitted straight.
5.一种制备太阳能电池栅电极的方法,其特征在于,包括下述步骤: (1)将太阳能基板设置于吸附平台上; (2)制备第一栅电极(2.1)将直径为100-400微米的喷嘴设置于喷嘴高度调节模块上,并将所述喷嘴的电接口与高压发生器连接,将所述喷嘴的银浆供给接口与银浆供给装置连接,所述喷嘴的打印端垂直于所述太阳能基板; (2.2)控制单元输出第一控制信号控制银浆供给装置给所述喷嘴的容腔内注入银浆;(2.3)控制单元输出第二控制信号控制喷嘴高度调节模块中滑块沿着丝杆滑动,调节喷嘴阵列高度为0.5-2cm ; (2.4)控制单元输出第三控制信号控制高压发生器给喷嘴与吸附平台之间施加电压;电压被设置为0.8-2kv ; (2.5)控制单元输出第四控制信号控制运动平台沿X向以150-300mm/s的速度运动,并形成第一栅电极; (3)根据制备第一栅电极的步骤制备第二栅电极,所述第 A method of making a solar cell of the gate electrode, characterized by comprising the steps of: (1) disposed on a substrate solar suction platform; (2) preparing a first gate electrode (2.1) having a diameter of 100-400 micron nozzle provided in the nozzle height adjustment module, and an electrical interface of the nozzle and high voltage generator is connected to the nozzle with the silver paste supply port connected to the supply means, said nozzle perpendicular to the print end solar said substrate; (2.2) a first control signal supplied to control unit outputs a silver paste to the cavity of the injection nozzle paste; (2.3) control means outputs the second control signal the height adjustment of the nozzle along the slide module sliding the screw, adjust the height of the nozzle array 0.5-2cm; (2.4) the control unit outputs a third control signal to the high voltage generator, a voltage is applied between the nozzle and the suction stage; voltage is set 0.8-2kv; (2.5) control a fourth control unit outputs a control signal to the motion platform in X 150-300mm / s motion speed, and forming a first gate electrode; (3) a second gate electrode made according to the procedure for preparing the first gate electrode, the first 二栅电极的宽度大于所述第一栅电极的宽度。 A second gate electrode in a width greater than the width of the first gate electrode.
6.如权利要求5所述的方法,其特征在于,制备第二栅电极的步骤(3)具体包括: (3.1)将直径为500-1000微米的喷嘴设置于喷嘴高度调节模块上,并将所述喷嘴的电接口与高压发生器连接,将所述喷嘴的银浆供给接口与银浆供给装置连接,所述喷嘴的打印端垂直于所述太阳能基板; (3.2)控制单元输出第一控制信号控制银浆供给装置给所述喷嘴的容腔内注入银浆; (3.3)控制单元输出第二控制信号控制喷嘴高度调节模块中滑块沿着丝杆滑动,调节喷嘴阵列高度为0.5-Icm ; (3.4)控制单元输出第三控制信号控制高压发生器给喷嘴与吸附平台之间施加电压;电压被设置为0.8-2kv。 6. The method according to claim 5, wherein the step (3) Preparation of the second gate electrode comprises: (3.1) a 500-1000 micron diameter of a nozzle disposed in the nozzle height adjusting module and the electrical interface with the nozzle connected to the high voltage generator, the paste supply nozzle and the paste supply device interfaces connected to the printing end of the nozzle is perpendicular to the solar substrate; (3.2) control means outputs a first control Silver control signal supplied to the cavity of the nozzle means injecting silver paste; (3.3) control means outputs the second control signal the height adjustment of the nozzle module slider sliding along the screw, adjust the height of the nozzle array of 0.5-Icm ; (3.4) the control unit outputs a third control signal to the high voltage generator, a voltage is applied between the nozzle and the suction stage; voltage is set to 0.8-2kv. (3.5)控制单元输出第四控制信号控制运动平台沿Y向以80-200mm/s的速度运动,并形成第二栅电极。 (3.5) the control unit outputs a fourth control signal in the Y-direction moving platform at 80-200mm / s the speed of movement, and the second gate electrode is formed.
7.如权利要求5所述的方法,其特征在于,所述第一栅电极的宽度为5 μ m-50 μ m,所述第一栅电极的高度为0.8 μ m-30 μ m。 7. The method according to claim 5, wherein a width of the first gate electrode is 5 μ m-50 μ m, a height of the first gate electrode is 0.8 μ m-30 μ m.
8.如权利要求5-7任一项所述的方法,其特征在于,两个第一栅电极之间的间距小于两个第二栅电极之间的间距。 The method according to any one of claims 5 to 7, characterized in that the distance between the two gate electrodes is less than the spacing between the first two second gate electrodes.
9.一种采用权利要求5 -8任一项所述的方法制备的太阳能栅电极结构。 Solar gate electrode structure prepared by using A method as claimed in any one of claims 5-8 in.
CN201310329671.8A 2013-07-31 2013-07-31 Apparatus and a method for manufacturing a solar cell of the gate electrode CN103456835B (en)

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