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Preparation method of perovskite thin film with introduced with capsaicine

A thin film preparation, perovskite technology, applied in final product manufacturing, sustainable manufacturing/processing, semiconductor/solid-state device manufacturing, etc. Humidity, oxygen sensitivity and other issues, to achieve the effect of increased size, low cost, mild and controllable reaction conditions

Active Publication Date: 2020-05-08
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The perovskite film preparation method in the prior art, due to the soft matter characteristics of the perovskite film and the volatility of its organic components, easily generates defects at the perovskite grain boundaries and on the surface, and these defects will cause current-carrying The recombination of electrons limits the efficiency of perovskite solar cells, and these defects are more sensitive to temperature, humidity, oxygen, etc., which accelerate the degradation of perovskite films and reduce the stability of devices. biggest stumbling block

Method used

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  • Preparation method of perovskite thin film with introduced with capsaicine
  • Preparation method of perovskite thin film with introduced with capsaicine
  • Preparation method of perovskite thin film with introduced with capsaicine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Preparation of PTAA film

[0020] Dissolve PTAA and F4TCNQ with a mass ratio of 4:1 in chlorobenzene, dissolve at 60°C, prepare a chlorobenzene solution with a PTAA content of 2mg / ml as a spin coating solution, heat and dissolve at 60°C Filter it into a spin-coating solution, drop it on the conductive glass substrate (ITO), spin-coat at a speed of 5000 rpm for 30 seconds, then place it on a heating platform at 150°C, and anneal for 10 minutes to obtain a PTAA film, spin-coat DMF solvent improves its wettability.

[0021] (2) Preparation of perovskite precursor

[0022] Weigh 1.08 mol of lead iodide and 1 mol of methyl iodide, dissolve in 750 microliters of N,N-dimethylformamide and 85 microliters of dimethyl sulfoxide mixed solvent, and form a precursor solution after fully dissolving .

[0023] (3) Preparation of perovskite thin films

[0024] The perovskite precursor solution was added dropwise on the PTAA film, spin-coated at 4000 rpm for 30 seconds, 150 micr...

Embodiment 2

[0029] (1) Preparation of PTAA film

[0030] With embodiment 1.

[0031] (2) Preparation of perovskite precursor

[0032] Weigh 1.08 mol of lead iodide and 1 mol of methyl iodide, dissolve in 750 microliters of N,N-dimethylformamide and 85 microliters of dimethyl sulfoxide mixed solvent, and add a mass ratio of 0.01wt% The capsaicin is fully dissolved to form a precursor solution.

[0033] (3) Preparation of perovskite thin films

[0034] With embodiment 1.

Embodiment 3

[0036] (1) Preparation of PTAA film

[0037] With embodiment 1.

[0038] (2) Preparation of perovskite precursor

[0039] Weigh 1.08 mol of lead iodide and 1 mol of methyl iodide, dissolve in 750 microliters of N,N-dimethylformamide and 85 microliters of dimethyl sulfoxide mixed solvent, add 0.1wt% Capsaicin is fully dissolved to form a precursor solution.

[0040] (3) Preparation of perovskite thin films

[0041] With embodiment 1.

[0042] See attached figure 2 , the perovskite film prepared above is characterized by electronic scanning, the perovskite film is flat and compact, and the grain size becomes significantly larger, indicating that the introduced capsaicin can effectively increase the perovskite grain size.

[0043] See attached image 3 , the perovskite film prepared above was found by spectral absorption, and the absorption intensity was also significantly improved after the introduction of capsaicin, which was consistent with the increase in grain size. ...

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Abstract

The invention discloses a preparation method of a perovskite thin film introduced with capsaicine, which is characterized in that capsaicine is introduced into a perovskite precursor liquid to improvethe grain size of the perovskite thin film and passivate defects in the perovskite thin film. The preparation method specifically comprises the preparation of the precursor liquid, a PTAA thin film and the perovskite thin film. Compared with the prior art, the method has good film forming quality, the introduced capsaicine can effectively delay the crystallization process of perovskite, increasethe size of perovskite grains and passivate defects in perovskite, the process is simple, the reaction conditions are mild and controllable, the added capsaicine is a renewable biological material, the cost is low, and the method is especially suitable for large-scale commercial production.

Description

technical field [0001] The invention relates to the technical field of perovskite solar cells, in particular to a method for preparing a perovskite film by using capsaicin to increase the grain size of the perovskite and passivating defects in the perovskite. Background technique [0002] As a renewable energy source, solar energy is not only clean, environmentally friendly, and pollution-free, but also has high safety and security, and is inexhaustible and inexhaustible. Solar energy is extremely important to solve human energy supply and alleviate environmental pollution, and the resulting issue of using solar energy to generate electricity has extremely important significance. Among many solar cells, organic-inorganic hybrid perovskite solar cells are one of the most promising photovoltaic technologies today. Organic-inorganic hybrid perovskite has low exciton binding energy and carrier diffusion length, and high absorption coefficient. It is an excellent material for ma...

Claims

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Application Information

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IPC IPC(8): H01L51/42H01L51/44H01L51/48H01L51/46
CPCH10K71/00H10K85/00H10K30/10H10K30/80Y02E10/549Y02P70/50
Inventor 保秦烨段纯刚熊少兵侯彰钰
Owner EAST CHINA NORMAL UNIV
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