Method for preparing thermal-stability perovskite CsPbI3 by dual-amino organic matter

A perovskite and organic technology, applied in organic semiconductor devices, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as poor stability of perovskite thin films, and achieve the effects of easy acquisition, maintenance of performance, and convenient operation.

Active Publication Date: 2017-02-22
CONTEMPORARY AMPEREX TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the perovskite film in this patent has the problem of poor stability, which is also a common problem in perovskite solar cells.

Method used

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  • Method for preparing thermal-stability perovskite CsPbI3 by dual-amino organic matter
  • Method for preparing thermal-stability perovskite CsPbI3 by dual-amino organic matter
  • Method for preparing thermal-stability perovskite CsPbI3 by dual-amino organic matter

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preparation example Construction

[0037] HPB 3 Preparation: Take a certain amount of PbI 2 The powder (purity not less than 99.9%, otherwise difficult to dissolve) is dissolved in DMF solvent to prepare a solution with a concentration of 1mol / L. Then slowly add hydroiodic acid (7.58mol / L) dropwise to the aforementioned solution under conditions of ice bath and magnetic stirring, and control HI and PbI 2 The ratio of the amount of substance is 1.2:1. Then magnetic stirring was carried out for 2 hours, and rotary evaporation was carried out at 80°C. The crystallized substance was washed repeatedly with ether, and finally dried to obtain HPbI 3 powder.

[0038] EDAI 2 (Ethylenediamine iodine) preparation: Ethylenediamine and hydroiodic acid are mixed at a ratio of 1:1.2, rotary evaporated at 60°C, washed repeatedly with ethanol, and finally dried to obtain EDAI 2 powder.

[0039] The solar cell substrate is sprayed with TiO on the FTO glass etched with concentrated hydrochloric acid and zinc powder. 2 Dens...

Embodiment 1

[0041] This embodiment relates to a method for dissolving a mixture in a DMF solvent, and then obtaining a perovskite film by spin coating, the method comprising the following steps:

[0042] 1) HPbI 3 , CsI (cesium iodide) and EDAI 2 (Ethylenediamine iodine) according to the ratio of the amount of substances of 1:1:0.025 (specifically: HPbI 3 2mmol, CsI 2mmol, EDAI 20.05mmol) was dissolved in 2mL DMF to obtain solution A;

[0043] 2) The solution A obtained in step 1) was spin-coated onto the solar cell substrate at 4000 rpm for 20 s, and then annealed on a hot stage at 100° C. for 5 minutes to obtain a perovskite film.

[0044] 3) Spin-coat the hole transport layer (HTM) on the perovskite film; vapor-deposit the counter electrode silver on the hole transport layer. For details about the manufacturing process of the solar cell, reference may be made to existing literature.

[0045] figure 1 The X-ray diffraction spectrum of Example 1 is provided, from which it can be c...

Embodiment 2

[0047] The present embodiment method is the same as embodiment 1, the difference is that HPbI 3 , CsI and EDAI 2 The ratio is 1:1:0.0125. according to image 3 , 4 It can be seen that the stability of the battery and the photoelectric conversion efficiency have slightly decreased.

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Abstract

The invention discloses a method for preparing thermal-stability perovskite CsPbI3 by a dual-amino organic matter. The method comprises the following steps of dissolving HPbI3, CsI and EDA12 in a DMF solution according to a mole ratio being 1:1:(0.0125-0.05) to obtain a precursor solution A; and spin-coating the precursor solution A on a solar cell substrate, and afterwards performing low-temperature annealing to obtain a perovskite thin film with a smooth surface. Such a type of battery is relatively high in photoelectric conversion efficiency and also is excellent in thermal stability.

Description

technical field [0001] The present invention relates to the CsPbI of synthetic perovskite crystal form 3 The method, specifically relates to a kind of preparing thermally stable perovskite CsPbI by bis-amino organic matter 3 Methods. Background technique [0002] In recent years, perovskite solar cells have become a research hotspot in the field of renewable energy due to their impressive photoelectric conversion efficiency, but their poor thermal stability severely limits their commercial applications. Therefore, it is of great significance to study how to improve the thermal stability of perovskite materials. [0003] CsPbI in the perovskite crystal form cannot be obtained in the prior art 3 , so CsPbI 3 Generally only used as a fluorescent material. [0004] Through the search of existing patent documents, it is found that the Chinese patent application with the application number 201510657577.4 discloses a new method for preparing perovskite thin films. The main ste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/46H01L51/48C01G21/00
CPCC01G21/006H10K71/12H10K71/40H10K30/151H10K2102/00Y02E10/549
Inventor 赵一新钱旭芳张太阳郭男杰李戈徐凤岳东亭阚淼贾爱华任孟
Owner CONTEMPORARY AMPEREX TECH CO
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