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Semitransparent thin film solar cell and its preparation method

A thin-film solar cell, translucent technology, applied in circuits, electrical components, photovoltaic power generation, etc., can solve the problems of reduced carrier mobility, deterioration of thin-film cell performance, and increased cell resistance, to improve stability and device performance. The effect of efficiency

Active Publication Date: 2020-04-14
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The preparation method of the water bath method is simple and low temperature, but its preparation time is very long (several hours), and there are still many parameters to be set (temperature, time, pH value and additives, etc.), resulting in poor repeatability, and uneven film formation. More oxide impurities; the film prepared by thermal evaporation is dense and uniform in composition, but the Sb prepared by various methods 2 S 3 Impurities such as oxides will be produced on the surface of the film, which will increase the battery resistance and reduce the carrier mobility, which will seriously deteriorate the Sb 2 S 3 Performance of Thin Film Batteries
and Sb 2 S 3 Most thin-film batteries use organic matter as the hole transport layer, resulting in poor battery stability. In order to avoid the use of organic matter, some device structures directly connect to the electrode without using the hole transport layer. Due to the problem of high back contact barriers, the interface The energy level does not match, the series resistance of the device is large, and the short-circuit current is low, so the conversion efficiency is not high

Method used

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Effect test

Embodiment 1

[0032] (1) Pre-cut ITO conductive glass (Shenzhen South China Xiangcheng Technology Co., Ltd.) with square resistance ≤7Ω / □ and light transmittance ≥84% into rectangular sheets of 15mm×20mm. The rectangular slices were ultrasonically cleaned with deionized water, glass cleaner, acetone, alcohol, and deionized water for 15 minutes, and then dried with an air compressor for use.

[0033] (2) On the ITO conductive glass to be used, spin-coat the electron transport layer with a KW-4A type spin coater, such as TiO 2 , ZnO, CdS, In 2 S 3 and SnO 2 any of them, please refer to figure 1 , the energy bands of these electron transport layers are similar to those of Sb 2 S 3 The energy band matching of the light absorbing layer.

[0034] Specifically, in this embodiment, spin-coated TiO 2 As an electron transport layer, the thickness is 40nm.

[0035] (3) The JGP450 high-vacuum magnetron sputtering system produced by Shenyang Scientific Instrument Co., Ltd. of the Chinese Academy...

Embodiment 2

[0047] (1) Pre-cut the FTO conductive glass (Wuhan Jingge Solar Technology Co., Ltd.) with a thickness of 2.2mm, a resistance of ≤14Ω / □, and a light transmittance of ≥90% into rectangular sheets of 15mm×20mm. The rectangular slices were ultrasonically cleaned with deionized water, glass cleaner, acetone, alcohol, and deionized water for 15 minutes, and then dried with an air compressor for use.

[0048] (2) A chemical water bath method is used to deposit a 50 nm CdS electron transport layer on the FTO conductive glass sheet to be used.

[0049] Specifically, 160 milliliters of deionized water was added to a 250 milliliter beaker, and then 0.03 mol / liter of cadmium sulfide solution, 1.5 mol / liter of thiourea and 14.5 milliliters of 25% ammonia were added to the beaker, Then put the beaker into a heat-collecting constant temperature heating magnetic stirrer and conduct a water bath at 80°C. After 3-6 minutes, the solution turns orange. After 8 minutes, a cadmium sulfide film of ...

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Abstract

The invention discloses a translucent thin film solar cell and a preparation method thereof, wherein the translucent thin film solar cell comprises a glass substrate, a transparent conductive layer, an electron transport layer, a Sb2S3 light absorption layer, a V2O5 hole transport layer and a back electrode which are sequentially laminated. According to the invention, V2O5, as an substitute, is used as the hole transport layer of the thin-film solar cell, so that a good energy level match can be formed with the Sb2S3 light absorption layer, and impurities such as oxides in the Sb2S3 light absorption layer can be effectively removed during the preparation process of the V2O5 hole transport layer, thereby the stability and the device efficiency of the translucent film solar cell based on theSb2S3 material as the absorption layer are improved.

Description

technical field [0001] The invention relates to the field of photoelectric materials and devices, in particular to a semitransparent thin-film solar cell and a preparation method thereof. Background technique [0002] Sb 2 S 3 It is a V-VI group sulfide semiconductor, which is abundant in the earth's crust, safe and non-toxic, and is widely used in photoelectric conversion devices, photocatalysis and other fields. my country's antimony ore reserves and output both rank first in the world, and the distribution range is very wide, covering Hunan, Guizhou, Yunnan, Guangxi and other provinces, especially in Hunan. Antimony ores are sulfides, mainly stibnite (Sb 2 S 3 ) form exists. Sb 2 S 3 It is easier to obtain from antimony ore. It belongs to the orthorhombic crystal system. The space group is Pbnm62. 10 5 cm -1 ), has good photoelectric performance under low-light lighting conditions, so it can get better photoelectric conversion efficiency in cloudy days or indoor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L31/032H01L31/0336H01L31/0725H01L31/18
CPCH01L31/032H01L31/0336H01L31/0725H01L31/18Y02E10/50Y02P70/50
Inventor 刘芳洋吴杰韩璐狄云翔康亮亮蒋良兴刘业翔
Owner CENT SOUTH UNIV
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