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Preparation method of flexible solar battery doped with sodium before formation of one-step-method absorption layer

A flexible solar cell and absorption layer technology, applied in circuits, photovoltaic power generation, electrical components, etc., to achieve the effects of large grain size, high conversion efficiency, and simple preparation process

Inactive Publication Date: 2015-03-18
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the technical problems in the known technology, the present invention provides a substrate that does not deform at high temperature, and the grown copper indium gallium selenide film does not fall off, and the crystal quality of the copper indium gallium selenide film is good, the crystal grain is large, and the defect is few. One-step preparation method for sodium-doped flexible solar cells with good electrical properties

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  • Preparation method of flexible solar battery doped with sodium before formation of one-step-method absorption layer

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preparation example Construction

[0019] The preparation method of the sodium-doped flexible solar cell before the one-step absorbing layer comprises the following preparation steps:

[0020] Step 1. prepare the rigid composite substrate that polyimide film 2-soda glass 1 forms;

[0021] Step 2. Prepare a front-doped sodium flexible solar cell on the polyimide film of the rigid composite substrate; the preparation process includes: sequentially preparing the Mo back contact layer 3, sodium fluoride preset on the polyimide film in step 1 layer 5, copper indium gallium selenide absorption layer 4, cadmium sulfide buffer layer 6, transparent window layer 7 and upper electrode 8; the preparation process of the sodium fluoride preset layer includes: a rigid composite substrate with a back contact layer placed In the selenization furnace of the thin film preparation system, vacuum the selenization furnace, the substrate temperature is 200-300°C, when the temperature of the NaF evaporation source reaches 800-850°C, e...

Embodiment

[0026] 1. Preparation of polyimide film-soda glass rigid composite substrate

[0027] (1) Cleaning soda glass: Soak 10cm×10cm and 1.5-2mm thick soda glass in potassium dichromate solution for 2 hours, take out the soda glass and rinse it with deionized water; put the rinsed soda glass in a concentration 99.5% acetone solution, put it into an ultrasonic cleaning machine, the ultrasonic frequency is 20-30kHz, and clean for 20-25min; take the soda glass out of the acetone solution, rinse it with deionized water, and then put the soda glass in the concentration Put it in 99.7% alcohol, put it into an ultrasonic cleaning machine, the ultrasonic frequency is 20-30kHz, and clean it for 20-25min; finally, take the soda glass out of the alcohol, put it in a beaker filled with deionized water, The frequency of the ultrasonic wave is 20-30kHz, and it is cleaned every 20-25 minutes, for a total of three times;

[0028] (2) Preparation of polyimide prefabricated film: blow dry the cleaned...

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Abstract

The invention relates to a preparation method of a flexible solar battery doped with sodium before the formation of a one-step-method absorption layer. The process of the preparation method comprises the following steps: 1, preparing a rigid compound substrate; 2, preparing a flexible solar battery on a polyimide film of the rigid compound substrate; preparing a sodium fluoride preset layer on the solar battery before a copper-indium-gallium-selenium absorption layer is prepared and preparing the copper-indium-gallium-selenium absorption layer by a one-step method; 3, separating the polyimide film from soda glass to finish a process of preparing the flexible solar battery doped with the sodium before the formation of the one-step-method absorption layer. According to the preparation method, the polyimide substrate is not deformed at a high temperature due to the adhesion force between the polyimide substrate and the glass; the grown flexible solar battery is not loosened and does not fall off; the sodium element is doped before the absorption layer grows, so that the electric property of the absorption layer is further improved and the flexible solar battery with the high conversion efficiency is realized.

Description

technical field [0001] The invention belongs to the technical field of solar cell production, and in particular relates to a one-step method for preparing a sodium-doped flexible solar cell before an absorbing layer. Background technique [0002] Copper indium gallium selenide (CIGS) belongs to group I-III-VI quaternary compound semiconductors and has a chalcopyrite crystal structure. Since the appearance of copper indium gallium selenide thin film solar cells in the 1970s, it has developed very rapidly and will gradually realize industrialization. This battery has the following characteristics: ①The bandgap width of CIGS can be adjusted within the range of 1.04ev-1.67ev. ②CiInGaSe is a direct bandgap semiconductor with an absorption coefficient of up to 105cm-1 for visible light. The thickness of the CIGS absorption layer only needs to be 1.5-2.5 μm, and the thickness of the whole battery is 3-4 μm. ③It has strong anti-radiation ability and is more suitable as a space po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L31/18
CPCH01L31/0322H01L31/18Y02E10/541Y02P70/50
Inventor 乔在祥张嘉伟李巍姚聪张旭冯洋冯金晖
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST