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Cs2AgBiBr6 doped Rb single crystal as well as synthesis and application thereof

A single crystal, single crystal material technology, applied in the direction of single crystal growth, single crystal growth, crystal growth, etc., can solve the problem of poor photoelectric performance of lead-free perovskite

Inactive Publication Date: 2021-03-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, people's research on this new type of lead-free perovskite is still in its preliminary stage. The crystal structure of lead-free perovskite is more complex, and the photoelectric performance of the lead-free perovskite studied is poor.

Method used

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  • Cs2AgBiBr6 doped Rb single crystal as well as synthesis and application thereof
  • Cs2AgBiBr6 doped Rb single crystal as well as synthesis and application thereof
  • Cs2AgBiBr6 doped Rb single crystal as well as synthesis and application thereof

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Experimental program
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Embodiment 1

[0055] A lead-free perovskite Cs 2 AgBr 6 The synthetic method of doping Rb specifically comprises the following steps:

[0056] (1) Accurately weigh 426mg of CsBr, BiBr 3 Dissolve 448mg in 20ml of HBr, stir and heat until dissolved at 130°C, add AgBr 188mg; AgBr 188mg, RbBr 16mg; AgBr 188mg, RbBr 32mg; AgBr 188mg, RbBr 48mg, continue to stir until dissolved, keep warm for two hours, then heat at 10°C Cool down to room temperature at a rate of / h, overnight, wash the sample with isopropanol solution until clear, and dry the sample at 60°C.

[0057] (2) Grind some samples after drying, and conduct XRD test on the public test platform of Dalian Institute of Chemical Physics, Chinese Academy of Sciences. The instrument model is Empyrean-100, the scanning angle is 10-80°, and the scanning speed is 8° / min

[0058] (3) Grind some samples after drying to make lead-free perovskite Cs with different Rb doping content 2 AgBr 6 absorption test.

[0059] (4) Through the fluorescenc...

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Abstract

The invention discloses a synthesis method of lead-free perovskite Cs2AgBiBr6 doped Rb, and belongs to the field of material luminescence. The method comprises the following step: in the process of synthesizing the lead-free perovskite Cs2AgBiBr6, doping the lead-free perovskite Cs2AgBiBr6 by adopting Rb with different contents. According to the invention, the growth of the lead-free perovskite Cs2AgBiBr6 doped Rb single crystal is realized. Through doping of different contents of Rb, the fluorescence intensity of the lead-free perovskite Cs2AgBiBr6 is firstly increased and then decreased, theservice life of the lead-free perovskite Cs2AgBiBr6 is firstly prolonged and then decreased, the diffusion coefficient of the lead-free perovskite Cs2AgBiBr6 is firstly increased and then decreased,and guiding significance is provided for research and development of the lead-free perovskite Cs2AgBiBr6.

Description

technical field [0001] The invention belongs to the field of luminescent materials, in particular to a lead-free perovskite Cs 2 AgBr 6 Synthetic method of doped Rb single crystal Background technique [0002] In recent years, a new type of semiconductor material—organic-inorganic hybrid perovskite ABX 3 [A=CH 3 NH 3+ ,(H 2 N) 2 CH + ;B=Pb 2+ ;X=Cl - ,Br - or I - ] has received extensive attention from scientists. Miyasaka's team first applied MAPbI in solar cells in 2009 3 At the beginning, people's research on perovskite cells set off a wave of research. The photoelectric conversion efficiency of perovskite solar cells has soared from 3.8% at the beginning to more than 22% today. The life of perovskite solar cells Thousands of hours have been improved from the first few hours. Organic-inorganic hybrid perovskite was selected by science as one of the top ten scientific breakthroughs in the world in 2013. It was pointed out in Nature in 2016 that future scienti...

Claims

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Application Information

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IPC IPC(8): C30B29/12C30B9/06H01L31/032
CPCC30B9/06C30B29/12H01L31/0321
Inventor 金盛烨尹延峰田文明边继明
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI