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Surface modified organic-inorganic hybrid perovskite material and modification method and application thereof

A perovskite material and surface modification technology, applied in photovoltaic power generation, electrical components, electrical solid devices, etc., can solve problems such as low energy and power density, incompatible manufacturing processes, and long time-consuming surface modification. Effects of defects, short wavelength, and short time consumption

Inactive Publication Date: 2018-10-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, researchers in related fields have used lasers to modify the surface of OIHP materials [J.Phys.Chem.Lett., 8(2017): 401-406; Adv.Funct.Mater., 26(2016): 4653- 4659], but the lasers used are all femtosecond lasers, which are expensive, have low energy and power density, take a long time for surface modification, and are not compatible with the current manufacturing process of advanced electronic devices

Method used

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  • Surface modified organic-inorganic hybrid perovskite material and modification method and application thereof
  • Surface modified organic-inorganic hybrid perovskite material and modification method and application thereof
  • Surface modified organic-inorganic hybrid perovskite material and modification method and application thereof

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Effect test

Embodiment 1

[0027] (1) Preparation of dense TiO on FTO conductive glass substrate by sol-gel method 2 Thin film: spin-coat titanium isopropoxide ethanol solution with a concentration of 0.2mol / L on a clean FTO conductive glass substrate, and anneal at 500°C for 30 minutes to obtain dense TiO 2 The thin film acts as a hole-blocking layer and an electron-transporting layer.

[0028] (2)CH 3 NH 3 PB 3 Preparation of thin film: appropriate amount of PbI 2 and CH 3 NH 3I is dissolved in the mixed solvent (DMF and DMSO volume ratio is 8:2) of N,N-dimethylformamide (DMF) and dimethyl sulfoxide (DMSO) according to the molar ratio of 1:1, obtains concentration: 1.2mol / L of CH 3 NH 3 PB 3 Precursor solution; in a nitrogen glove box, CH 3 NH 3 PB 3 Precursor solution spin-coated on dense TiO 2 On top of the film, and 1 mL of chlorobenzene was added dropwise during the spin-coating process, and then the obtained film was heat-treated at 70 °C for 10 minutes and 100 °C for 10 minutes to o...

Embodiment 2

[0033] (1) Prepare dense TiO with a thickness of about 40 nm on an 80 mm × 80 mm FTO conductive glass substrate by magnetron sputtering 2 The thin film acts as a hole-blocking layer and an electron-transporting layer.

[0034] (2) Vacuum thermal evaporation method is used to make dense TiO 2 Evaporate about 220nm thick PbI on the electron transport layer 2 film, which was then soaked in 10 mg / mL CH 3 NH 3 I in the isopropanol solution of I for 30 minutes, take it out and heat it on a hot stage at 100°C for 20 minutes to obtain CH 3 NH 3 PB 3 perovskite thin film.

[0035] (3)CH 3 NH 3 PB 3 Laser surface modification of thin films: e.g. Figure 4 As shown, the prepared CH 3 NH 3 PB 3 The perovskite film 102 is placed on the conveyor belt 101, and the 308nm XeCl excimer laser beam 103 is irradiated on the CH from top to bottom. 3 NH 3 PB 3 on the perovskite film 102. 308nm XeCl excimer laser beam 103 spot size 80mm×5mm, energy density 500μJ / cm 2 , the laser wor...

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Abstract

The invention relates to surface modified organic-inorganic hybrid perovskite material and a modification method and application thereof. The surface modified organic-inorganic hybrid perovskite material is acquired in a way that the ultraviolet pulse laser generated by the excimer laser is applied to irradiate the surface of the organic-inorganic hybrid perovskite material. The modification method is fast and efficient and great in modification effect, and the precursor material which is not fully converted into the perovskite on the surface of the inorganic hybrid perovskite material is enabled to react under the effect of high energy photons to generate the perovskite so that the material surface defect can be reduced, the recombination probability of the carriers in the perovskite solar cell and other perovskite-based devices can be reduced and the performance of the device can be enhanced. The method is compatible with the manufacturing technology of the present advanced electronic device and suitable for research and commercial production of the organic-inorganic hybrid perovskite-based solar cell, the light-emitting diode, the laser, the photoelectric detector, the high energy ray detector, the gas sensor and the information memory so as to have great application prospect.

Description

technical field [0001] The invention belongs to the technical field of surface modification of semiconductor materials, and in particular relates to a surface-modified organic-inorganic hybrid perovskite material, a modification method and an application. Background technique [0002] CH since 2009 3 NH 3 PB 3 and CH 3 NH 3 PbBr 3 Since they were first used as light-absorbing materials in sensitized solar cells, perovskite solar cells (Perovskite solar cells, PSCs) and organic-inorganic hybrid perovskite (Organic-inorganic hybrid perovskite, OIHP) materials have rapidly become popular in photovoltaic and related fields. research hotspots. The performance of PSCs has experienced an unprecedented rapid improvement in the photovoltaic field, and its photoelectric conversion efficiency has reached 22.7%, which is comparable to that of polycrystalline silicon solar cells [Prog.Photovolt.:Res.Appl.,26(2018):3–12 ]. At the same time, the application fields of OIHP materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/48H01L51/56
CPCH10K71/00H10K30/10Y02E10/549
Inventor 王时茂单雪燕董伟伟方晓东孟钢陶汝华邓赞红邵景珍
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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