Efficient and stable perovskite solar battery and preparation method thereof

A solar cell and perovskite technology, applied in the field of solar cells, can solve the problems of poor cell efficiency and stability, easy migration of ions, etc., and achieve improved photogenerated carrier transport performance and stability, good crystallinity, and low cost. low effect

Active Publication Date: 2017-10-20
EAST CHINA NORMAL UNIVERSITY
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Problems solved by technology

[0004] The purpose of the present invention is to provide a high-efficiency and stable perovskite for the problems of easy migration of ions in the perovskite layer and the existence of a large number of grain boundaries in the existing perovskite solar cell preparation technology, which lead to poor battery efficiency and stability. Solar cell and its preparation method

Method used

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  • Efficient and stable perovskite solar battery and preparation method thereof
  • Efficient and stable perovskite solar battery and preparation method thereof
  • Efficient and stable perovskite solar battery and preparation method thereof

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Embodiment 1

[0029] On the FTO conductive glass, spin-coating concentration is 0.15 mol / liter of isopropyl titanate absolute ethanol solution, the rotating speed is 4000 rpm, the time is 40 seconds, then annealed at 500 ° C for 30 minutes; then spin-coat titanium dioxide nanoparticles ( Dyesol, 18-NRT, diluted with absolute ethanol at a mass ratio of 1:6, fully stirred) as a mesoporous layer, the rotating speed is 4000 rpm, the time is 40 seconds, and then annealed at 500 ° C for 30 minutes; further, the above The titanium dioxide layer is soaked in 0.1 mol / liter titanium tetrachloride aqueous solution at 70°C for 30 minutes, washed with deionized water and absolute ethanol in turn after taking it out, and then annealed at 500°C for 30 minutes; The one-step perovskite precursor solution (462 mg lead iodide, 159 mg methylammonium iodide, 80 μl DMSO and 650 μl DMF) was spin-coated on the titanium oxide layer prepared in the previous step at 4000 rpm / minute, the time is 40 seconds, drop 500...

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Abstract

The invention discloses an efficient and stable perovskite solar battery, which is formed by transparent conductive glass, an electron transfer layer, a mesoporous layer, a perovskite layer, a hole transfer layer and a back electrode which are laminated in sequence. During preparation of the perovskite layer, a certain quantity of terephthalic acid (TPA) additives are added to a precursor liquid of a traditional organic and inorganic metal halide perovskite, so that growth kinetics of a perovskite crystal changes, an obtained perovskite crystal boundary is filled up, and thus joined large-sized perovskite crystal particles are formed. According to the perovskite solar battery prepared by the method, compared with an additive-free perovskite solar battery, annihilation of photoproduction excitons at the crystal boundary is reduced, so that the photoelectric conversion efficiency is obviously increased. In addition, the perovskite crystal boundary is reduced, moisture, oxygen and the like are difficult to enter from the crystal boundary to corrode the perovskite layer, thereby enabling the stability of the whole battery to be obviously better.

Description

technical field [0001] The invention belongs to the technical field of solar cells, and in particular relates to a perovskite solar cell and a preparation method thereof. Background technique [0002] The development of efficient and cheap solar cells is an effective means to solve the problems of energy shortage and environmental pollution faced by the current society. In recent years, organic-inorganic metal halide perovskite solar cells have attracted much attention due to their cheap raw materials, simple preparation process, and high photoelectric conversion efficiency. At present, perovskite solar cells have made major breakthroughs in the preparation process and mechanism research. The highest photoelectric conversion efficiency has reached 22.1%, which is basically comparable to silicon solar cells, showing an extremely attractive application prospect. [0003] However, organic-inorganic metal halide perovskite is an ionic compound, which is easily degraded by water...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/46H01L51/48
CPCH10K71/12H10K85/30H10K30/30Y02E10/549
Inventor 侯显陈晓红潘丽坤谢文辉骆慧谢伟佳张健开毛武剑
Owner EAST CHINA NORMAL UNIVERSITY
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