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A work electrode of dye sensitization solar battery

A technology for solar cells and working electrodes, applied in the field of dye-sensitized solar cells, can solve the problems of decreased electron transport capacity, short diffusion distance, and limit the efficiency of dye-sensitized solar cells, etc., so as to improve the collection and transport efficiency, improve the Short-circuit current and efficiency, the effect of high design feasibility

Inactive Publication Date: 2008-07-09
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, while nanocrystals increase the specific surface area, they also bring negative effects
The main performance is that due to the scattering effect and potential barrier of the grain boundary, etc., the transport capacity of electrons in it is reduced, and the diffusion distance of electrons in the nanocrystalline working electrode is very short (less than the penetration depth of light), so that a large number of electrons are in the future. It is annihilated by recombination before reaching the external electrode, which greatly limits the further improvement of the efficiency of dye-sensitized solar cells

Method used

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  • A work electrode of dye sensitization solar battery

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Embodiment 1

[0019] Embodiment 1: As shown in Figure 2, the described dye-sensitized solar cell working electrode includes a conductive substrate 1 and a working electrode 2, and a conductive microchannel 3 is provided inside the working electrode 2, and one end of the conductive microchannel 3 is attached On the conductive substrate 1 , the other end goes deep into the working electrode 2 and is tightly surrounded by the working electrode material. The conductive microchannels 3 are isolated from each other, and the distance between them is on the order of the diffusion depth of electrons in the working electrode, usually 50nm-50mm, and forms an ordered or disordered array structure. The shape of the conductive microchannel 3 is nanometer and / or micrometer wire, the material is semiconductor, the diameter is 3nm, and the length is 500nm.

Embodiment 2

[0020] Embodiment 2: The basic structure of dye-sensitized solar cell working electrode is as embodiment 1, wherein the shape of conductive microchannel 3 is nanometer and / or microtube, also can be nanometer and / or micrometer needle, nanometer and / or micrometer needle Ribbons, nano and / or micro cones, nano and / or micro helices.

Embodiment 3

[0021] Example 3: The basic structure of the working electrode of the dye-sensitized solar cell is as in Example 1, wherein the material of the conductive microchannel 3 is metal, or a conductive polymer.

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Abstract

The invention discloses a working electrode of a dye-sensitized solar cell, which is characterized in that the interior of the working electrode of the dye-sensitized solar cell is added with a conductive micro-channel so as to enhance capture and collection efficiency of electron and avoid electron hole recombination, thus improving the efficiency and other performance indicators of the solar cell. The invention has novel design and feasible preparation, therefore the invention is an effective way for improving the efficiency of the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a dye-sensitized solar cell, in particular to a dye-sensitized solar cell working electrode. Background technique [0002] Since Swiss scientist Grtzel et al. invented low-cost dye-sensitized nanocrystalline solar cells (ie, Grtzel cells) in 1991, dye-sensitized solar cells have developed rapidly. The advantages of dye-sensitized solar cells are low cost, simple process and stable performance. Its production cost is only 1 / 5 to 1 / 10 of that of silicon solar cells, and it is environmentally friendly. However, the relatively low photoelectric efficiency is its major weakness, and the current dye-sensitized solar cells still do not meet the requirements of commercial applications. [0003] Dye-sensitized solar cells are mainly composed of three parts: working electrode, electrolyte and counter electrode. Its working principle is: the dye molecule absorbs sunlight energy and transitions to the excited state, the excited state ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/0224H01G9/048H01G9/20H01M14/00H01M4/02
CPCY02E10/542Y02E60/10
Inventor 祝名伟陈延峰唐月锋卢明辉闵乃本
Owner NANJING UNIV
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