CN101740224A - 形成离子液体结晶体系的染料敏化太阳能电池的制备方法 - Google Patents
形成离子液体结晶体系的染料敏化太阳能电池的制备方法 Download PDFInfo
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Abstract
本发明公开了一种形成离子液体结晶体系的染料敏化太阳能电池的制备方法,硫氰酸-1-甲基-3-十二烷基咪唑盐和1-甲基-3-十二烷基咪唑碘按混合来制备均匀溶液,然后向该溶液加入碘化锂、碘和、4-叔丁基吡啶TBP配成离子液体电解质,将氧化钛TiO2导电材料涂覆在氟掺杂的氧化锡导电玻璃基底上,从而形成透明电极,然后将该电极浸入在乙醇和乙睛的溶剂混合物中制备的染料溶液中32~48小时,染料吸附后,在该电极上施加由铂材料构成的对电极,然后将离子液体电解质注入所述两个电极之间,然后升温至80℃保持5分钟,维持该电解质完全渗透,并随后降至室温,封装得到的产物为染料敏化太阳能电池。本发明提高电池光电转换效率。
Description
技术领域
本发明涉及新型离子液体自组装成为双分子层结构,特别涉及形成离子液体结晶体系的染料敏化太阳能电池的制备方法。
背景技术
通常,太阳能电池是用于将太阳光转化为电能的光伏元件。与其它能源不同,太阳能电池可不受限制地使用,对环境友好,并因此被期望逐渐成为日益重要的能源。特别地,期望太阳能电池不仅能使用太阳光充电,而且可安装在各种便携式信息装置上如便携式计算机、移动电话、个人便携式终端等。
常规地,由单晶或多晶硅制成的硅太阳能电池已被主要地应用。然而,硅太阳能电池由于需要使用大型而昂贵的设备,并从而制造成本高,因而存在缺陷。此外,由太阳能转电能转化效率增加的能力受到限制。因此,需要新的替代物。
该硅太阳能电池的替代物为由可廉价制造的有机材料构成的太阳能电池。特别地,考虑具有极低制造成本的染料敏化太阳能电池。该染料敏化太阳能电池由于其使用透明电极,它可应用于建筑物或玻璃温室的外部玻璃墙。
染料敏化太阳能电池是一种光电化学太阳能电池,其包含由具有吸附于其上的染料颗粒的金属氧化物纳米颗粒构成的光电极、对电极和装载在该两个电极之间的氧化还原电解质。所述光电极由透明导电基底、含有金属氧化物的金属氧化物层和染料组成。
当太阳光入射到该太阳能电池上时,光子首先被染料吸收。当染料吸收太阳光时,其转变为激发态,如此使得电子转移至金属洋货物的导带,空穴转移至电解质层。将电子传输至该电极上,然后流向外电路以传输电能,之后它们以较低能态转移至对电极,在那里耗尽所传输的能量。
尽管使用有机溶剂电解质的常规染料敏化太阳能电池具有高能量转换效率,但因电解质渗漏和有机溶剂蒸发,其性能随着时间恶化。该不稳定性是由于有机溶剂的使用。从而,这类太阳能电池很难商业化。已进行多种尝试以防止电解质渗漏。特别地,已经开发了使用离子液体电解质的染料敏化太阳能电池,所述离子液体电解质具有不挥发、不可燃、热容量大、热稳定性好、离子电导率高、分解电压高等诸多优点,能够提高太阳能电池的稳定性和耐久性。
但是离子液体电解质粘度过大,不能很好地渗透到金属氧化物层中去,故基于离子液体电解质的染料敏化太阳能电池光电转换效率始终不如基于低黏度的有机溶剂电解质的染料敏化太阳能电池效率高。
发明内容
为了解决离子液体电解质的染料敏化太阳能电池光电转换效率低,本发明提供一种形成离子液体结晶体系的染料敏化太阳能电池的制备方法,通过给氧化还原电对创造出一条新的扩散途径来提高它们的扩散系数,进而提高电池光电转换效率。
本发明的技术方案是这样实现的:
首先制备硫氰酸-1-甲基-3-十二烷基咪唑盐:
将80~100ml的N-甲基咪唑和150~180ml的氯化正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的氯化正十二烷,时间是10~16小时,最后得到浅黄色油状的硫氰酸-1-甲基-3-十二烷基咪唑盐;
制备1-甲基-3-十二烷基咪唑碘:
将80~100ml的N-甲基咪唑和150~180ml的碘代正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的碘代正十二烷,时间是10~16小时,最后得到油状的1-甲基-3-十二烷基咪唑碘;
将上述得到的硫氰酸-1-甲基-3-十二烷基咪唑盐和1-甲基-3-十二烷基咪唑碘按1∶1体积比混合来制备均匀溶液,然后向该溶液加入0.1~0.15摩尔/升的碘化锂、0.15~0.35摩尔/升的碘和0.45~0.55摩尔/升的4-叔丁基吡啶TBP配成离子液体电解质,接着,将氧化钛TiO2导电材料涂覆在氟掺杂的氧化锡导电玻璃基底上,从而形成透明电极,然后将该电极浸入在1∶1体积比的乙醇和乙睛的溶剂混合物中制备的0.3mmol的N719染料溶液中32~48小时,使得染料吸附于其上,染料吸附后,在该电极上施加由铂材料构成的对电极,然后将离子液体电解质注入所述两个电极之间,然后升温至80℃保持5分钟,维持该电解质完全渗透,并随后降至室温,封装得到的产物为染料敏化太阳能电池。
本发明提供含有离子液体电解质的染料敏化太阳能电池,其中将两种类型的离子液体混合在一起作为溶剂,其然后产生构成所述离子液体电解质。该染料敏化太阳能电池由此表现出稳定性和耐久性、高能量转换效率,并且本发明提供方便的制造方法。本发明提供包含光电极、对电极和在所述光电极与对电极之间的电解质层的染料敏化太阳能电池。本发明提出的制备离子液体的方法工艺简单、反应条件温和、成本低,有利于大规模的工业生产。
具体实施方式
下面通过实施例进一步描述本发明的实施方式。
我们发现一系列咪唑盐由于其存在相互交错的烷基链,可以自组装成双分子层结构,形成了具有近晶相SA的离子液体结晶体系,由于离子在SA水平的方向上离子电导率高,故可将I-3和I-定位在SA双分子层的水平方向上,形成一个二维的电子传输通道。将这种离子液体与I2混合作为DSC用电解质,开路电压和电流密度都比非结晶离子液体体系的DSC高。该工作也为DSC用离子液体的研究开辟了新的路径。
其中一系列咪唑盐结构通式为:
R选自C10~C20烷基,X选自无机阴离子:如I-、Br-、Cl-、BF4 -、PF6 -、SCN-、(CF3SO2)N-、CF3SO3 -、N(CN)2 -等。
硫氰酸-1-甲基-3-十二烷基咪唑盐的合成
如在以下反应1过程所示的,合成硫氰酸-1-甲基-3-十二烷基咪唑盐。
〔反应1〕
将80~100ml的N-甲基咪唑和150~180ml的氯化正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的氯化正十二烷,时间是10~16小时,最后得到浅黄色油状的硫氰酸-1-甲基-3-十二烷基咪唑盐。
1-甲基-3-十二烷基咪唑碘的合成
如在以下反应2过程所示的,合成硫氰酸-1-甲基-3-十二烷基咪唑盐。
〔反应2〕
将80~100ml的N-甲基咪唑和150~180ml的碘代正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的碘代正十二烷,时间是10~16小时,最后得到油状的1-甲基-3-十二烷基咪唑碘。
实施例:染料敏化太阳能电池的制造
将上述得到的硫氰酸-1-甲基-3-十二烷基咪唑盐(制备实施例1)和1-甲基-3-十二烷基咪唑碘(制备实施例2)按1∶1体积比混合来制备均匀溶液,然后向该溶液加入0.1~0.15摩尔/升的碘化锂、0.15~0.35摩尔/升的碘和0.45~0.55摩尔/升的4-叔丁基吡啶(TBP)配成离子液体电解质。接着,将氧化钛(TiO2)导电材料涂覆在氟掺杂的氧化锡导电玻璃基底上,从而形成透明电极。然后将该电极浸入在1∶1体积比的乙醇和乙睛的溶剂混合物中制备的0.3mmol的染料溶液(N719,可得自Solaronix)中32~48小时,使得染料吸附于其上。染料吸附后,在该电极上施加由铂材料构成的对电极。然后将离子液体电解质注入所述两个电极之间,然后升温至80℃保持5分钟,维持该电解质完全渗透,并随后降至室温,封装得到的产物为染料敏化太阳能电池。
Claims (1)
1.形成离子液体结晶体系的染料敏化太阳能电池的制备方法,其特征在于,包括以下步骤:
首先制备硫氰酸-1-甲基-3-十二烷基咪唑盐:
将80~100ml的N-甲基咪唑和150~180ml的氯化正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的氯化正十二烷,时间是10~16小时,最后得到浅黄色油状的硫氰酸-1-甲基-3-十二烷基咪唑盐;
制备1-甲基-3-十二烷基咪唑碘:
将80~100ml的N-甲基咪唑和150~180ml的碘代正十二烷加入到500ml三口瓶中,接通回流装置,并在回流装置上接干燥管,然后放入油浴锅中中反应,油浴温度为70~80℃,稳定10~30min后升温,控制油浴温度为100~110℃,回流60~80h后停止加热;
将装有油状液体的锥行瓶放到真空烘箱中,控制温度在120℃除去剩余的碘代正十二烷,时间是10~16小时,最后得到油状的1-甲基-3-十二烷基咪唑碘;
将上述得到的硫氰酸-1-甲基-3-十二烷基咪唑盐和1-甲基-3-十二烷基咪唑碘按1∶1体积比混合来制备均匀溶液,然后向该溶液加入0.1~0.15摩尔/升的碘化锂、0.15~0.35摩尔/升的碘和0.45~0.55摩尔/升的4-叔丁基吡啶TBP配成离子液体电解质,接着,将氧化钛TiO2导电材料涂覆在氟掺杂的氧化锡导电玻璃基底上,从而形成透明电极,然后将该电极浸入在1∶1体积比的乙醇和乙睛的溶剂混合物中制备的0.3mmo1的N719染料溶液中32~48小时,使得染料吸附于其上,染料吸附后,在该电极上施加由铂材料构成的对电极,然后将离子液体电解质注入所述两个电极之间,然后升温至80℃保持5分钟,维持该电解质完全渗透,并随后降至室温,封装得到的产物为染料敏化太阳能电池。
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