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High-stability perovskite solar cell

A solar cell, high-stability technology, applied in the field of solar cells and light-emitting devices, can solve the problems of affecting charge transfer, reducing cell conversion rate, poor stability of perovskite solar cells, etc., and achieving the effect of good efficiency and good stability

Inactive Publication Date: 2016-07-06
CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0003] However, at present, perovskite solar cells are still facing severe challenges of poor stability (NatureEnergy, 2016, 1:15015.)
Conventional three-dimensional perovskite materials have high photoelectric conversion efficiency (publication number 105428542A, publication number 105244449A), but they easily react with water vapor and oxygen in the air, resulting in the decomposition of perovskite
It has also been reported to modify the interface by introducing a hydrophobic layer on the perovskite to improve the stability of the perovskite (NatureEnergy, 2016: 15016.), but the hydrophobic interface layer affects the transport of charges to a certain extent, reducing the conversion of the battery. Rate
In the past two years, a new type of solar cell based on a two-dimensional perovskite structure has been reported internationally, which has high stability, but the disadvantage is that the photoelectric conversion efficiency is low (Journal of the American Chemical Society, 2015, 137(24): 7843-7850.)

Method used

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Embodiment 1

[0014] This embodiment provides a high stability perovskite solar cell, such as figure 1 As shown, the structure of the cell includes: a substrate 101 , a transparent electrode 102 , a transport layer 1 103 , a two-dimensional-three-dimensional composite perovskite layer 104 , a transport layer 2 105 and a back electrode 106 . Among them, the structure of the two-dimensional-three-dimensional composite perovskite layer 104 is to add a layer of two-dimensional layered perovskite on the basis of the three-dimensional perovskite, so as to improve the stability of the battery without reducing the photoelectric conversion rate of the battery. The specific preparation steps of the battery are as follows:

[0015] 1. Substrate cleaning and ozone treatment: After scrubbing the substrate with detergent, place the substrate in deionized water, acetone, and isopropanol in sequence, ultrasonically clean it for 10-15 minutes each time, and then dry it with a nitrogen gun. Then put the sub...

Embodiment 2

[0023] Embodiment 2 is identical to Embodiment 1 except that step 5 is different. In this embodiment, step 5 is: spin-coat a cyclopropylamine two-dimensional layered perovskite-like layer with a concentration of 10mg / ml-30mg / ml on the substrate B, the spin-coating speed is 2000-4000rpm, and the spin-coating time is 30-60s, and heat preservation and annealing at 100°C for 10-20min. Then transfer to a glass petri dish for cooling to obtain a substrate B loaded with a perovskite film to obtain a substrate C.

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Abstract

The invention provides a high-stability perovskite solar cell of a two dimensional-three dimensional composite perovskite structure, and relates to the field of solar cells and light emitting devices. The high-stability perovskite solar cell is characterized in that two-dimensional perovskite and three-dimensional perovskite are combined, the high stability of the two-dimensional perovskite and the high photoelectric conversion efficiency of the three-dimensional perovskite are fully utilized, and the stability is substantially improved without influencing the efficiency of the perovskite solar cell.

Description

technical field [0001] The invention belongs to the field of solar cells and light-emitting devices, in particular to a high-stability perovskite solar cell. Background technique [0002] The current energy crisis and environmental pollution have become the focus of global attention. Solar photovoltaic cells can directly convert solar energy into electrical energy, which is an important countermeasure for human beings to deal with energy crisis and environmental pollution. In recent years, the emergence of perovskite solar cells has attracted widespread attention from academia and industry. Since the perovskite solar cell was first prepared in 2009, its conversion efficiency has rapidly increased from 3.8% (Journal of the American Chemical Society, 2009, 131(17): 6050-6051.) to 20% (Science, 2015, 348 (6240): 1234-1237.), approaching commercially viable levels. Compared with inorganic solar cells such as silicon, cadmium telluride, and copper indium gallium selenide, perov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/44H01L51/46
CPCH10K85/00H10K30/00H10K30/80Y02E10/549
Inventor 汤林龙陆仕荣麻超燕冷重钱史浩飞魏兴战杜春雷
Owner CHONGQING INST OF GREEN & INTELLIGENT TECH CHINESE ACADEMY OF SCI
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