Double-electron-transport-layer flexible perovskite solar cell and preparation method thereof

A dual electron transport, solar cell technology, applied in the field of solar cells, can solve the problems of uneven thin film, holes, etc., and achieve the effects of simple preparation process, reduced leakage current, and good application prospects

Active Publication Date: 2020-10-30
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Different from the conventional single-layer CdS electron transport layer, this method adds a layer of high-resistance SnO between the flexible substrate and CdS 2 The film acts as a buffer layer to improve the problem of uneven and porous CdS film, avoid the leakage current caused by the direct contact between the perovskite layer and the conductive glass, and enhance the electron extraction ability of CdS, thereby improving the battery efficiency

Method used

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  • Double-electron-transport-layer flexible perovskite solar cell and preparation method thereof
  • Double-electron-transport-layer flexible perovskite solar cell and preparation method thereof
  • Double-electron-transport-layer flexible perovskite solar cell and preparation method thereof

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Embodiment 1

[0037] 1. Cleaning of the conductive substrate: Cut the PET flexible substrate according to the required size, etch it with diluted hydrochloric acid and zinc powder, and then ultrasonically clean it with detergent, deionized water, acetone, ethanol, and isopropanol After cleaning for 15 minutes, dry the glass with a nitrogen gun, and then treat it with an ultraviolet ozone cleaning machine for 20 minutes, and set it aside;

[0038] 2. SnO 2 Preparation of the electron transport layer: the commercial SnO 2 The hydrosol and deionized water were mixed and diluted according to the volume ratio of 1:7, and then spin-coated on the cleaned flexible substrate at a speed of 3000 rpm for 30 s. After the spin coating is finished, place it on a heating table and heat it at 150°C for 30 minutes;

[0039] 3. Preparation of CdS electron transport layer: the flexible substrate prepared in step 2 / SnO 2 The film was put into a precursor solution composed of deionized water, cadmium acetate,...

Embodiment 2

[0047] 1. Cleaning of the conductive substrate: Cut the PET flexible substrate according to the required size, etch it with diluted hydrochloric acid and zinc powder, and then ultrasonically clean it with detergent, deionized water, acetone, ethanol, and isopropanol After cleaning for 15 minutes, dry the glass with a nitrogen gun, and then treat it with an ultraviolet ozone cleaning machine for 20 minutes, and set it aside;

[0048] 2. SnO 2 Preparation of the electron transport layer: the commercial SnO 2 The hydrosol was diluted with deionized water according to a certain volume ratio, and then spin-coated on the cleaned flexible substrate at a speed of 3000 rpm for 30 s. After the spin coating is finished, place it on a heating table and heat it at 150°C for 30 minutes;

[0049] 3. Preparation of CdS electron transport layer: the flexible substrate prepared in step 2 / SnO 2 The film was put into a precursor solution composed of deionized water, cadmium acetate, ammonium a...

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Abstract

The invention discloses a double-electron-transport-layer flexible perovskite solar cell and a preparation method thereof. A device structure of the double-electron-transport-layer flexible perovskitesolar cell sequentially comprises a flexible conductive substrate / SnO2 / CdS / perovskite absorption layer / hole transport layer / metal electrode from bottom to top. SnO2 and CdS are combined to serve as adouble-electron transmission layer, and the advantages are as follows: (1) CdS and SnO2 are prepared at low temperature and are very suitable for developing flexible photovoltaic devices; (2) the CdSfilm has high electron mobility and is beneficial to charge transmission of the device; and (3) the SnO2 layer is deposited between the flexible substrate and the CdS layer cadmium sulfide, so that the problems of non-uniformity and holes when the CdS layer is directly deposited on the substrate can be improved, the leakage current is reduced, and the electron extraction capability is enhanced.

Description

technical field [0001] The invention relates to a solar cell preparation technology, in particular to a double electron transport layer flexible perovskite solar cell and a preparation method thereof, belonging to the technical field of solar cells. Background technique [0002] With the continuous improvement of the industrialization level of solar cells, the field of photovoltaic applications continues to expand. In wearable electronics applications, a large number of flexible and portable solar cells are required. The characteristics of flexible solar cells determine that it has a wider application field than rigid substrate solar cells, and can be widely used as an ideal power source for wearable photovoltaic products such as solar outdoor sports equipment. More importantly, flexible solar cells can be fabricated continuously on a large scale using a roll-to-roll process, greatly reducing production costs and making it possible for their industrialization. [0003] Per...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48H01L51/00
CPCH10K71/12H10K30/15H10K77/111Y02E10/549Y02P70/50
Inventor 周儒周钧天方存龙罗成万磊牛海红
Owner HEFEI UNIV OF TECH
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