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Method for controlling ion migration of methylamino lead halide perovskite single crystal

A methylamino lead bromide, ion migration technology, applied in semiconductor devices, electrical components, circuits, etc., can solve the problems of inapplicability and large limitations of perovskite material systems, and improve photoelectric conversion efficiency and reliability. , suppressing the effect of the built-in electric field

Inactive Publication Date: 2019-08-20
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method effectively regulates the migration of Cu ions, it is too limited and is only limited to the migration of copper ions in Cu-based thermoelectric materials, which is not applicable to perovskite material systems.

Method used

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  • Method for controlling ion migration of methylamino lead halide perovskite single crystal
  • Method for controlling ion migration of methylamino lead halide perovskite single crystal

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for regulating the migration of methylamino lead halide perovskite single crystal ions, the surface micro-nano pattern structure is as follows figure 1 Shown; the oblique area 4 is the processing area of ​​the single crystal surface;

[0031] structured as figure 1 As shown, the processing is carried out along the crystal direction on the {100} plane of methylamino lead chloride perovskite single crystal;

[0032] (1) Using electron beam exposure (EBL) combined with dry etching (ICP) to process a rectangular structure on a methylamino lead chloride single crystal.

[0033] (2) The processed rectangular structure has a depth of 100nm, a width of 100nm, and a length of 5μm. The shape of the sidewall is rectangular, the length is 100 nm, and the width is 5 μm.

[0034] (3) The photoelectric conversion efficiency is about 10.64% higher than that of the unintegrated micro-nano pattern structure.

Embodiment 2

[0036] A method for regulating the ion migration of methylaminolead halide perovskite single crystal, processing along the crystal direction on the {100} plane of methylaminolead halide perovskite single crystal;

[0037] (1) A rectangular structure is processed on a methylamino lead chloride single crystal by photolithography combined with reactive ion etching (RIE) technology.

[0038] (2) The processed rectangular structure has a depth of 5 μm, a width of 10 μm, and a length of 5 μm. The shape of the longitudinal side wall is trapezoidal, the upper base is 10 μm long, the lower base is 15 μm long, and the height is 5 μm.

[0039] (3) The photoelectric conversion efficiency is about 8.52% higher than that of the unintegrated micro-nano pattern structure.

Embodiment 3

[0041] A method for regulating the ion migration of methylaminolead halide perovskite single crystal, processing along the crystal direction on the {100} plane of methylaminolead halide perovskite single crystal;

[0042] (1) A ring structure is processed on a methylamino lead chloride single crystal by photolithography combined with reactive ion etching (RIE) technology.

[0043] (2) The depth of the processed annular structure is 2 μm, the width of the outer diameter is 2 μm, and the width of the inner diameter is 1 μm. The shape of the longitudinal sidewall is arc-shaped, and the radius of curvature is 1 μm.

[0044] (3) The photoelectric conversion efficiency is about 9.75% higher than that of the unintegrated micro-nano pattern structure.

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Abstract

The invention provides a method for controlling ion migration of methylamino lead halide perovskite single crystal, and belongs to the technical field of surface microstructure processing. According to the invention, a micro-nano graphic structure is processed on the {100} surface of the methylamino lead halide perovskite single crystal along the (110) crystal direction, and accumulated ions in the (100) crystal direction of the original single crystal gradually accumulate towards the (110) crystal direction by using the effective control of the graphic structure for the ion migration, therebysolving the problems of low photoelectric conversion efficiency, poor reliability and short life of photoelectric devices due to the ion accumulation, and having great potential in the application ofthe photoelectric devices.

Description

technical field [0001] The invention relates to a method for regulating the migration of methylamino lead halide perovskite single crystal ions, and belongs to the technical field of surface microstructure processing. Background technique [0002] Since the late 1970s, methylaminolead halide perovskites (MAPbX 3 ) materials have received extensive attention in the fields of photodetection devices, photovoltaic devices, electroluminescence, and laser devices because of their long carrier diffusion distance, direct bandgap, and continuously adjustable bandgap. However, while the methylamino lead halide perovskite material exhibited excellent photoelectric conversion properties, Yuan, Yang et al. discovered the phenomenon of charge accumulation on the surface of the methylamino lead halide perovskite material film due to ion migration: in During the whole process of ion migration, the movement of charged ions near the metal electrode will be blocked, resulting in charge accumu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/00H10K99/00
CPCH10K71/231H10K71/233
Inventor 张子琦左致远
Owner SHANDONG UNIV