A slurry for light scattering layer on photoanode of dye-sensitized solar cell and preparation method thereof

A technology of solar cells and dye sensitization, applied in the field of solar cells, can solve the problems that the scattering layer slurry does not improve the performance of the cells significantly, cannot be market-oriented and mass-produced, and is difficult to mass-produce and industrialize. Effects of recycling efficiency, improvement of photoelectric conversion efficiency, and improvement of battery efficiency

Active Publication Date: 2017-02-15
KUSN INNOVATION INST OF NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Disadvantages of this preparation technology: it is difficult to uniformly disperse and mix the particles in additives and pore-forming agents by using the grinding method during preparation, and cracks are prone to occur after high-temperature sintering
[0012] Disadvantages of this technology: the preparation process of this technology is too complicated and cumbersome, it cannot be marketed and batched, and it is limited to the laboratory, and the efficiency of the battery prepared by this technology is only 3.28%. At present, the efficiency of the DSSC field has already exceeded 10%. So such efficiency does not have any advantages and novelties in this field
[0016] Disadvantages of this technology: the preparation cycle is relatively long, at least two days, and the size of the hydrothermal kettle in the hydrothermal reaction restricts the amount of slurry prepared by this preparation technology, it is difficult to batch and industrialize, and the technology prepared The performance improvement of the battery by the scattering layer slurry is not obvious enough

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step (1): 4g of TiO with a particle size distribution range of 10-30nm 2 Nanopowder and 12g of TiO with a particle size of 0.4μm 2 powder mix;

[0042] Step (2): The TiO mixed in step (1) 2 Powder according to mass ratio TiO 2 : Absolute ethanol=1:15 ratio, uniformly dispersed in absolute ethanol solution to form A solution;

[0043]Step (3): Prepare ethyl cellulose (#46080, viscosity 30-50mPa.s, purchased from Sigma) into 12wt% absolute ethanol solution to form B solution;

[0044] Step (4): Add solution B of step (3) dropwise to solution A of step (2), according to the mass ratio of TiO 2 : Ethyl cellulose = 1: 0.4 comparison dropwise addition of B solution;

[0045] Step (5): Add terpineol dropwise to step (4), according to the mass ratio of TiO 2 : Terpineol = 1:4 comparative drop;

[0046] Step (6): Stir the solution in step (5) mechanically for 2-3 hours to fully mix the solution evenly, and finally obtain a white colloidal emulsion;

[0047] Step (7): Pou...

Embodiment 2

[0049] Step (1): 8g of TiO with a particle size distribution range of 10-30nm 2 Nanopowder and 8g of TiO with a particle size of 0.3μm 2 powder mix;

[0050] Step (2): The TiO mixed in step (1) 2 Powder according to mass ratio TiO 2 : Absolute ethanol=1:15 ratio, uniformly dispersed in absolute ethanol solution to form A solution;

[0051] Step (3): Prepare ethyl cellulose (#46080, viscosity 30-50mPa.s, purchased from Sigma) into 10wt% absolute ethanol solution to form B solution;

[0052] Step (4): Add solution B of step (3) dropwise to solution A of step (2), according to the mass ratio of TiO 2 : Ethyl cellulose = 1:0.5 comparison drop B solution;

[0053] Step (5): Add terpineol dropwise to step (4), according to the mass ratio of TiO 2 : Terpineol = 1:5 comparative drop;

[0054] Step (6): Stir the solution in step (5) mechanically for 3 hours to fully mix the solution evenly, and finally obtain a white colloidal emulsion;

[0055] Step (7): Pour the solution in s...

Embodiment 3

[0057] Step (1): 4g of TiO with a particle size distribution range of 10-30nm 2 Nano powder and 18g of TiO with a particle size of 0.2 μm 2 powder mix;

[0058] Step (2): The TiO mixed in step (1) 2 Powder according to mass ratio TiO 2 : Absolute ethanol=1:20 ratio, uniformly dispersed in absolute ethanol solution to form A solution;

[0059] Step (3): The ethyl cellulose viscosity m9 (viscosity is 8~10 mPa.s, Shanghai test) and m70 (viscosity is 40~100mPa.s, Shanghai test) are prepared according to the mass ratio of 1:1 to 12wt% The dehydrated ethanol solution, forms B solution;

[0060] Step (4): Add solution B of step (3) dropwise to solution A of step (2), according to the mass ratio of TiO 2 : Ethyl cellulose = 1: 0.4 comparison dropwise addition of B solution;

[0061] Step (5): Add terpineol dropwise to step (4), according to the mass ratio of TiO 2 : Terpineol = 1:5 comparative drop;

[0062] Step (6): Stir the solution in step (5) mechanically for 3 hours to f...

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Abstract

The invention discloses a sizing agent for dyeing a light scattering layer on a DSSC photoanode. The sizing agent is composed of TiO2 particles, ethylene cellulose and terpilenol, and the weight ratio of the TiO2 particles to the ethylene cellulose to the terpilenol is 1:0.2-0.5:2-8, wherein the TiO2 particles are formed by the fact that TiO2 nano particles of 10-30 nm and TiO2 particles of 0.2-0.4 micrometers are mixed in the proportion of 1:1-5 by weight. The sizing agent for the light scattering layer of the DSSC photoanode is formed by mixing big particle TiO2 and small particle TiO2 of an anatase structure in a certain proportion, the small particle TiO2 of 10 nm - 30 nm has a transition effect, combination of a transmission layer and a scattering layer is promoted, the cracking phenomenon of the photoanode after high temperature sintering is prevented, meanwhile, the optical distance is increased, and the cell efficiency is improved.

Description

technical field [0001] The invention relates to a slurry for a light scattering layer on a photoanode of a dye-sensitized solar cell and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] As a new energy source, solar energy has attracted more and more attention under the environment of global warming and smog. Among various thin-film solar cells, dye-sensitized solar cells have attracted more and more attention due to their advantages such as simple manufacturing process, easy mass production, and low cost. In dye-sensitized solar cells, the performance of the porous photoanode is particularly important to the performance of the cell, so there have been more and more studies on the photoanode film over the years. [0003] In order to achieve as much dye adsorption as possible, while achieving a firm contact with the conductive substrate, and to realize the transport of electrons from the excited state of the dye to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G9/20H01G9/042
CPCY02E10/542
Inventor 文贵华顾军邹志刚
Owner KUSN INNOVATION INST OF NANJING UNIV
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