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Bipolar molecule stable perovskite material and photoelectric device

A technology of perovskite materials and optoelectronic devices, which is applied in electric solid devices, electrical components, semiconductor devices, etc., can solve problems such as poor stability of light-emitting diodes, reduce hysteresis, improve working stability and efficiency, and improve thermal stability. The effect of stability

Active Publication Date: 2022-03-22
ZHEJIANG UNIV
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Problems solved by technology

Although the efficiency of photoelectric devices based on perovskite materials is comparable to that of commercial inorganic and organic photoelectric devices, the stability of perovskite-based light-emitting diodes is still poor. Most of the perovskite light-emitting diodes reported by the research group have a T 50 The lifespan (the time for the electroluminescent intensity of the device to decay to 50% of the initial intensity value) is still between 0.1-100 h, and the working stability of the device is still a challenge

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  • Bipolar molecule stable perovskite material and photoelectric device
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Embodiment Construction

[0073] The general structural formula of perovskite of the present invention is D:A' 2 A n-1 B n x 3n+1 (n=1,2,3,⋯) or D:ABX 3 , where A' is an organic amine cation, such as phenethylamine cation (PEA + ), phentermine cation (PBA + ), 1,4-butanediamine (BDA 2+ ), p-Fluorophenethylamine cation (p-F-PEA + ), 2-(4-methoxyphenyl)ethylamine hydrobromide (MOPEA + ) etc.; A is a monovalent cation, such as cesium ion (Cs + ), methylamine ion (MA + ), formidine (FA + ), ethylamine ion (EA + ), hydrazine ion (HA + ), guanidine ion (GA + ), isopropylamine ion (IPA + ), imidazolium ion (IA + )wait. B is a metal cation, such as lead ion (Pb 2+ ), tin ions (Sn 2+ ), germanium ions (Ge 2+ ), indium ions (In 2+ ), bismuth ions (Bi 2+ ), silver ions (Ag + ), sodium ions (Na + ) etc.; X is an anion including: chloride ion (Cl - ), bromide ion (Br - ), iodide ion (I - ), etc., D is a bipolar molecular stabilizer. The bipolar molecular stabilizer is a class of molecular...

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Abstract

The invention discloses a perovskite material with stable bipolar molecules and a photoelectric device, and belongs to the field of photoelectric materials and technologies. The invention aims to provide a perovskite material with stable bipolar molecules and a photoelectric device, which can indirectly enhance the interaction between metal cations and halogen anions, reduce the defect state density in the perovskite material and inhibit ion migration in the perovskite material by utilizing bipolar groups in a bipolar molecule stabilizer. The component of the perovskite material with stable bipolar molecules is D: A '2An-1BnX3n + 1 (n = 1, 2, 3) or D: ABX3, wherein A' is an organic amine cation, A is a monovalent cation, B is a metal cation, X is a monovalent anion, and D is a bipolar molecule stabilizer. The thermal stability, phase stability and fluorescence stability of the material are remarkably enhanced, and the working stability and efficiency of the perovskite material and a photoelectric device are remarkably improved.

Description

technical field [0001] The invention belongs to the field of photoelectric materials and technologies. Background technique [0002] Perovskite has excellent photoelectric properties, such as high carrier mobility, long carrier diffusion distance, solution method preparation, continuously adjustable band gap, low defect state density, wide spectral absorption range, high luminous efficiency, spectral Narrow bandwidth and other advantages have been widely used and researched in many semiconductor devices such as solar cells, light-emitting diodes, lasers, X-ray detectors, and field-effect transistors. In 2009, the solar cell based on perovskite material was first reported, which kicked off the application of perovskite material in solar cells, and then the solar cell based on perovskite developed rapidly, and its power conversion efficiency has exceeded 25% at present. %, and the working stability has reached more than thousands of hours, but its working stability is restric...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/54H01L51/50H01L51/56
CPCH10K71/00H10K85/30H10K50/11Y02E10/549H10K85/50
Inventor 狄大卫郭兵兵连亚霄赵保丹
Owner ZHEJIANG UNIV
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