CN105489381B - Dye-sensitized solar cells light scattering layer and preparation method thereof - Google Patents
Dye-sensitized solar cells light scattering layer and preparation method thereof Download PDFInfo
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- CN105489381B CN105489381B CN201510759631.6A CN201510759631A CN105489381B CN 105489381 B CN105489381 B CN 105489381B CN 201510759631 A CN201510759631 A CN 201510759631A CN 105489381 B CN105489381 B CN 105489381B
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- Y—GENERAL 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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/542—Dye sensitized solar cells
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- Y—GENERAL 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
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Abstract
The invention discloses a kind of dye-sensitized solar cells light scattering layer, including the P25 nano-crystalline thins film layer stacked gradually and titania nanotube layers of balls, the TiO2Nanotube layers of balls is hollow ball-shape, the radial TiO of surrounding by centre2Nanotube ball powder arranges.The dye-sensitized solar cells light scattering layer has larger specific surface, adds the adsorbance of dyestuff, photoelectric current is improved, so as to improve photoelectric conversion efficiency；The TiO of macroscopical micron-scale of hydrothermal synthesis2Nanotube ball considerably increases the Multiple Scattering to sunlight, improves absorption of the light anode to sunlight；3rd, TiO2The special 1-dimention nano tube passage of nanotube ball improves the migration rate of electronics, reduces dark current, so as to improve the photoelectric conversion efficiency of battery.The present invention provides the preparation method of the dye-sensitized solar cells light scattering layer, the TiO of synthesis2Nanotube ball size uniform, simple for process, repeatability is strong.
Description
Technical field
The invention belongs to field of dye-sensitized solar cells more particularly to a kind of dye-sensitized solar cells light scattering
Layer and preparation method thereof.
Background technology
Dye-sensitized solar cells is as a kind of new chemical solar cell, with its simple manufacture craft, low
Honest and clean cost, higher energy conversion efficiency, good application prospect and receive much attention.It is by electro-conductive glass, titanium dioxide
" sandwich " formula structure that semiconductive thin film, dye sensitizing agent, redox electrolyte and platinum plating form electrode.By single
Pure TiO2The photo-anode film of nano particle composition has big specific surface area, is conducive to the absorption of dye molecule, with conduction
The contact of glass is close, advantageously reduces the compound of the light induced electron for being transferred to conductive glass surface and electrolyte, but right
The scattering power of light is low, and incident light has been directed through photo-anode film, greatly reduces the utilization rate to light.Thus, it is thin in P25
A kind of large-sized titanium dioxide tube ball light scattering layer is prepared on the basis of on film can solve the problems, such as this.
The content of the invention
In order to achieve the above object, the present invention provides a kind of dye-sensitized solar cells light of high-photoelectric transformation efficiency
Scattering layer and preparation method thereof.
On the one hand, the present invention provides a kind of dye-sensitized solar cells light scattering layer, including the P25 stacked gradually
Nano-crystalline thin film layer and titania nanotube layers of balls, the TiO2Nanotube layers of balls by centre is hollow ball-shape, surrounding is in putting
Penetrate the TiO of shape2Nanotube ball powder arranges.
Second aspect, the present invention provides the systems of dye-sensitized solar cells light scattering layer described in first aspect present invention
Preparation Method comprises the following steps：
Step A, by Ti (SO4)2、NH4F and CO (NH2)2After mixing, 1h~12h is reacted at 150 DEG C~180 DEG C, after cooling
Solid product is taken out, is rinsed, it is dry, obtain TiO2Hollow spherical powder；
Step B, the TiO that step A is obtained2Hollow spherical powder is mixed with strong base solution, the hydro-thermal at 120 DEG C~180 DEG C
1h~48h, cooling are reacted, it is neutrality that acid solution, which is washed to PH, dry, and obtained white powder is warming up to 400 DEG C~600 DEG C,
1h~3h is kept the temperature, cooling obtains TiO2Nanotube ball powder；
Step C, the TiO that step B is obtained2Nanotube ball powder is made after being mixed with dispersant, levelling agent, pore-creating film forming agent
It is standby to be applied to P25 nano-crystalline thin film surfaces into viscous syrup, 400~500 DEG C are warming up to the rate of 1~5 DEG C/min, heat preservation
30min~60min, then 500 DEG C~600 DEG C are warming up to the rate of 1~2 DEG C/min, 30min~60min is kept the temperature, cooling obtains
To the dye-sensitized solar cells light scattering layer.
The advantageous effect of dye-sensitized solar cells light scattering layer provided by the invention and preparation method thereof is：
(1) TiO prepared by the present invention2Nanotube ball be by many nozzle diameters be about 10nm nanotube mutually winding and
The engraved structure of formation, TiO2The form of nanotube ball is uniform, and size is larger, is 2~5 μm, as dye sensitization of solar electricity
Pond light scattering layer has larger specific surface, adds the adsorbance of dyestuff, photoelectric current is improved, so as to improve the dye sensitization sun
The photoelectric conversion efficiency of energy battery；The TiO of macroscopical micron-scale of another aspect hydrothermal synthesis2Nanotube ball considerably increases pair
The Multiple Scattering of sunlight improves absorption of the light anode to sunlight；3rd, TiO2Nanotube ball is by 1-dimention nano pipe phase
Mutually interspersed to form, special 1-dimention nano tube passage improves the migration rate of electronics, reduces dark current, so as to improve electricity
The photoelectric conversion efficiency in pond；
(2) TiO of preparation method synthesis of the present invention2Nanotube ball size uniform, simple for process, repeatability is strong.
Description of the drawings
Fig. 1 is the structure diagram of dye-sensitized solar cells light scattering layer of the present invention.
Fig. 2 is the TiO that 1 step A of the embodiment of the present invention is obtained2The low power SEM figures of hollow spherical powder.
Fig. 3 is the TiO that 1 step A of the embodiment of the present invention is obtained2The low power TEM figures of hollow spherical powder.
Fig. 4 is the TiO that 1 step B of the embodiment of the present invention is arrived2The low power SEM figures of nanotube ball powder.
Fig. 5 is the TiO that 1 step B of the embodiment of the present invention is obtained2The low power SEM figures of nanotube ball powder.
Fig. 6 is the TiO that 1 step B of the embodiment of the present invention is obtained2The high power TEM figures of nanotube ball powder.
Fig. 7 is that the high power TEM of Fig. 6 boxed areas schemes.
Fig. 8 is the section of the dye-sensitized solar cell anode with light scattering layer prepared by the embodiment of the present invention 1
SEM schemes.
The bilayer film dyestuff with light scattering layer that Fig. 9 is commercially available P25 films with the embodiment of the present invention 1 is prepared is quick
Change the diffusing reflection rate curve of solar cell.
Figure 10 is the sun of the light with light scattering layer that the nanocrystalline light anodes of commercially available P25 and the embodiment of the present invention 1 are prepared
Photoelectric current~voltage curve of pole.
Specific embodiment
As shown in Figure 1, on the one hand, the present invention provides a kind of dye-sensitized solar cells light scattering layer, including according to
The P25 nano-crystalline thins film layer 1 and titania nanotube layers of balls 2 of secondary stacking, the TiO2Nanotube layers of balls 2 is hollow by centre
Spherical, the radial TiO of surrounding2Nanotube ball powder arranges.
Specifically, the P25 nano-crystalline thins film layer 1 is attached to 3 surface of electro-conductive glass.The electro-conductive glass 3 can be mixed
The fin oxide condutire glass (FTO) of fluorine or the indium oxide electro-conductive glass (ITO) for mixing tin, preferably FTO.
Preferably, the TiO2Nanotube ball powder particle size is 2~5 μm.
Preferably, the TiO2Nanotube ball powder particle specific surface area is 60~300m2/g。
Second aspect, the present invention provides the systems of dye-sensitized solar cells light scattering layer described in first aspect present invention
Preparation Method comprises the following steps：
Step A, by Ti (SO4)2、NH4F and CO (NH2)2After mixing, 1h~12h is reacted at 150 DEG C~180 DEG C, after cooling
Solid product is taken out, is rinsed, it is dry, obtain TiO2Hollow spherical powder；
Step B, the TiO that step A is obtained2Hollow spherical powder is mixed with strong base solution, the hydro-thermal at 120 DEG C~180 DEG C
1h~48h, cooling are reacted, it is neutrality that acid solution, which is washed to PH, dry, and obtained white powder is warming up to 400 DEG C~600 DEG C,
1h~3h is kept the temperature, cooling obtains TiO2Nanotube ball powder；
Step C, the TiO that step B is obtained2Nanotube ball powder is made after being mixed with dispersant, levelling agent, pore-creating film forming agent
It is standby to be applied to P25 nano-crystalline thin film surfaces into viscous syrup, 400~500 DEG C are warming up to the rate of 1~5 DEG C/min, heat preservation
30min~60min, then 500 DEG C~600 DEG C are warming up to the rate of 1~2 DEG C/min, 30min~60min is kept the temperature, cooling obtains
To the dye-sensitized solar cells light scattering layer.
Preferably, Ti (SO in the step A4)2、NH4F and CO (NH2)2Dosage molar ratio is 0.1~1:0.1~2:
0.1~2.
Preferably, drying condition is 60 DEG C~100 DEG C dry 8h~for 24 hours in vacuum drying chamber in the step A.
Preferably, strong base solution uses NaOH solution of the concentration for 2mol/L~10mol/L in the step B.The step
The heating rate that 400 DEG C~600 DEG C are warming up in rapid B is 1~5 DEG C/min.
Specifically, the acid solution washing uses HCl solution of the concentration for 0.01mol/L~1mol/L.
Preferably, dispersant uses absolute ethyl alcohol in the step C.
Preferably, levelling agent uses terpinol in the step C.
Preferably, pore-creating film forming agent uses ethyl cellulose or hydroxymethyl cellulose in the step C.
Preferably, TiO in the step C2Nanotube ball powder is with dispersant, levelling agent and pore-creating film forming agent mass ratio
0.1~1.0：4：1：1.0~2.0.
With reference to specific embodiment, further the present invention will be described in detail.Certainly described embodiment is only
The part of the embodiment rather than whole embodiments of the present invention, based on the embodiments of the present invention, those skilled in the art are not having
All other embodiments obtained under the premise of creative work are made, belong to protection scope of the present invention.
Embodiment 1
Step A prepares TiO2Hollow spherical powder：By 2.4g Ti (SO4)2、0.37g NH4F and 1.2g CO (NH2)2Mixing,
A hour is stirred, is poured into 100mL polyethylene reaction kettles, 180 DEG C of reaction 12h take out after the reaction was complete natural cooling, point
Not Yong deionized water, ethyl alcohol rinsing three times, in vacuum drying chamber 80 DEG C of dryings for 24 hours, obtain TiO2Hollow spherical powder,
Step B prepares TiO2Pipe ball powder：Weigh TiO prepared by 2g steps A2Hollow spherical powder, adding in 24mL concentration is
In the NaOH solution of 10mol/L, it is transferred in 100mL polyethylene hydrothermal reaction kettles, hydro-thermal reaction for 24 hours, has been reacted at 180 DEG C
Afterwards, treat reaction kettle natural cooling, washed respectively with 0.1M HCl, deionized water, until PH=7, the powder then obtained is in vacuum
For 24 hours, the white powder of acquisition is placed in Muffle furnace for 80 DEG C of dryings in drying box, and 250 DEG C are warming up to the speed of 1 DEG C/min,
350 DEG C are warming up to the speed of 1/3 DEG C/min again, then 30min is kept the temperature at 350 DEG C, is warming up to 1/2 DEG C/min at 500 DEG C
30min is kept the temperature, is taken out after natural cooling to get TiO2Pipe ball powder.
Step C prepares dye-sensitized solar cells light scattering layer：By TiO made from step B2Pipe ball powder：Anhydrous second
Alcohol：Terpinol：Mass concentration is ethanol solution=0.5 of 10% ethyl cellulose：4：1：2 mass ratio is configured to viscosity
Slurry pastes 3 layers of 3M adhesive tapes control thickness on the basis of P25 membrane electrodes, by viscous syrup blade coating on P25 membrane electrodes,
Placing 30min in air makes slurry nature levelling, takes adhesive tape off, is placed in Muffle furnace and anneals, is heated up with the rate of 2 DEG C/min
To 450 DEG C, 30min is kept the temperature, then 500 DEG C are warming up to the rate of 1 DEG C/min, keeps the temperature 30min, naturally cooling to room temperature can obtain
To dye-sensitized solar cells light scattering layer as described in Figure 1.
Fig. 2, Fig. 3 are the low power SEM figures for the titanium dioxide hollow ball powder that step A is obtained and TEM figures respectively, it can be seen that
Obtained hollow ball surface smoother, size are 400~900nm.
Fig. 4, Fig. 5 are the low power SEM figures of step B titania nanotube ball powder obtained by the reaction, it can be seen that are passed through
Second of buck thermal response, after washing and pickling, hollow ball maintains its basic pattern, but surface becomes coarse.
Fig. 6, Fig. 7 are the TiO that step B is finally obtained2The high power TEM figures of nanotube ball powder, it can be seen that hollow ball table
Face in substance forms caliber as 10~20nm, and length is hundreds of nanometers of the nano tube structure to intermesh, i.e., intermediate for sky
The radial TiO of bulbus cordis shape, surrounding2Nanotube ball powder, a diameter of 2~5 μm of pipe ball, this structure considerably increases micro-
The specific surface area of micro-nano structure so as to add Dye Adsorption amount, improves photoelectron injection efficiency；Furthermore as light scattering layer,
TiO2Nanotube spherical structure is capable of the sunlight of reflected radiation, improves the capture ability to sunlight.
Embodiment 2
The present embodiment is substantially the same manner as Example 1, the difference is that,
Step C prepares dye-sensitized solar cells light scattering layer：By TiO made from step B2Pipe ball powder：Anhydrous second
Alcohol：Terpinol：Mass concentration is ethanol solution=1 of 10% ethyl cellulose：4：1：1 mass ratio is configured to thin pulp
Material pastes 3 layers of 3M adhesive tapes control thickness on the basis of FTO electro-conductive glass, grout is scratched on FTO electro-conductive glass, in air
Middle placement 30min makes slurry nature levelling, takes adhesive tape off, is placed in Muffle furnace and anneals, 450 are warming up to the rate of 2 DEG C/min
DEG C, 30min is kept the temperature, then 500 DEG C are warming up to the rate of 1 DEG C/min, 30min is kept the temperature, naturally cooling to room temperature can be had
There is the dye-sensitized solar cell anode of light scattering layer.
Fig. 8 is the figures of the dye-sensitized solar cell anode section SEM with light scattering layer prepared by embodiment 1.
The dye-sensitized solar cells light scattering that commercially available P25 films are prepared with the embodiment of the present invention 1 is tested respectively
The diffusing reflection rate of layer, obtains Fig. 9 results, it can be seen that in the visible region of 400nm~800nm, prepared by the embodiment of the present invention 1
Obtained dye-sensitized solar cells light scattering layer shows highest diffusing reflection rate.
The light with light scattering layer that the nanocrystalline light anodes of commercially available P25 and the embodiment of the present invention 1 are prepared is tested respectively
Photoelectric current~voltage curve of anode, obtains result shown in Figure 10.It can be seen that from Figure 10：The battery that the two is assembled into has
Similar open-circuit voltage, the dye-sensitized solar cells that the embodiment of the present invention 1 is prepared have the density of photocurrent of bigger,
For 19.9mA/cm2, the efficiency of light anode is 6.78%, illustrates the electricity of the dye sensitization of solar with light scattering layer of the present invention
The photoelectric conversion efficiency higher in pond.
Claims (7)
1. a kind of preparation method of dye-sensitized solar cells light scattering layer, comprises the following steps：
Step A, by Ti (SO4)2、NH4F and CO (NH2)2After mixing, 1h~12h is reacted at 150 DEG C~180 DEG C, is taken out after cooling
Solid product rinses, dry, obtains TiO2Hollow spherical powder；
Step B, the TiO that step A is obtained2Hollow spherical powder is mixed with strong base solution, the hydro-thermal reaction 1h at 120 DEG C~180 DEG C
~48h, cooling, it is neutrality that acid solution, which is washed to PH, dry, and obtained white powder is warming up to 400 DEG C~600 DEG C, keeps the temperature 1h
~3h, cooling, obtains TiO2Nanotube ball powder；
Step C, the TiO that step B is obtained2Nanotube ball powder is prepared into after being mixed with dispersant, levelling agent, pore-creating film forming agent
Viscous syrup is applied to P25 nano-crystalline thin film surfaces, is warming up to 400~500 DEG C with the rate of 1~5 DEG C/min, heat preservation
30min~60min, then 500 DEG C~600 DEG C are warming up to the rate of 1~2 DEG C/min, 30min~60min is kept the temperature, cooling obtains
To the dye-sensitized solar cells light scattering layer；
The dye-sensitized solar cells light scattering layer, receives including the P25 nano-crystalline thins film layer stacked gradually and titanium dioxide
Mitron layers of balls, the TiO2Nanotube layers of balls is hollow ball-shape, the radial TiO of surrounding by centre2Nanotube ball powder arranges
It forms.
2. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
Ti (SO in rapid A4)2、NH4F and CO (NH2)2Dosage molar ratio is 0.1~1:0.1~2:0.1~2.
3. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
Drying condition is 60 DEG C~100 DEG C dry 8h~for 24 hours in vacuum drying chamber in rapid A.
4. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
The heating rate that 400 DEG C~600 DEG C are warming up in rapid B is 1~5 DEG C/min.
5. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
Levelling agent uses terpinol in rapid C.
6. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
Pore-creating film forming agent uses ethyl cellulose or hydroxymethyl cellulose in rapid C.
7. the preparation method of dye-sensitized solar cells light scattering layer as described in claim 1, it is characterised in that：The step
TiO in rapid C2Nanotube ball powder is 0.1~1.0 with dispersant, levelling agent and pore-creating film forming agent mass ratio：4：1：1.0~
2.0。
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| CN108063053B (en) * | 2016-11-08 | 2020-03-03 | 台湾塑胶工业股份有限公司 | Method for manufacturing dye-sensitized solar cell |
| CN108648917B (en) * | 2018-04-26 | 2019-11-01 | 天津大学 | The preparation method of dye-sensitized solar cells scattering layer material is constituted with ultra-fine clay |
| CN109524242A (en) * | 2018-11-28 | 2019-03-26 | 湖北大学 | Composite double layer photo-anode film, preparation method and dye-sensitized solar cells |
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| CN102280268A (en) * | 2011-05-24 | 2011-12-14 | 湖北大学 | Double-layer structured photoanode of dye-sensitized solar cell and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102280268A (en) * | 2011-05-24 | 2011-12-14 | 湖北大学 | Double-layer structured photoanode of dye-sensitized solar cell and preparation method thereof |
Non-Patent Citations (3)
| Title |
|---|
| Size-dependent light-scattering effects of nanoporous TiO2 spheres in dye-sensitized solar cells;In Gyoung Yu等;《Journal of Materials Chemistry》;20101027;第21卷;第532-538页 * |
| Template-free solvothermal fabrication of hierarchical TiO2 hollow microspheres for efficient dye-sensitized solar cells;Guo-Jun Ke等;《Journal of Materials Chemistry A》;20130830;第1卷;第13274-13282页 * |
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