Surface Photovoltage Spectroscopy Study of Ultrasonically Sprayed-Aerosol CH3NH3PbI3 Perovskite Crystals

被引：14

作者：

Henjongchom, Nakorn ^{[1
]}

Rujisamphan, Nopporn ^{[2
,3
]}

Tang, I-Ming ^{[4
]}

Supasai, Thidarat ^{[1
]}

机构：

[1] Kasetsart Univ, Fac Sci, Dept Mat Sci, Bangkok 10900, Thailand

[2] King Mongkuts Univ Technol Thonburi, Fac Sci, Nanosci & Nanotechnol Grad Program, Bangkok 10140, Thailand

[3] King Mongkuts Univ Technol Thonburi, Fac Sci, Theoret & Computat Sci Ctr TaCS, Bangkok 10140, Thailand

[4] King Mongkuts Univ Technol Thonburi, Computat & Appl Sci Smart Innovat Cluster CLASSIC, Bangkok 10140, Thailand

来源：

PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2018年 / 215卷 / 14期

关键词：

CH3NH3PbI3; surface photovoltage; trap states; ultrasonically sprayed-on based technique; OPTICAL-ABSORPTION EDGE; SOLAR-CELLS; HALIDE PEROVSKITES; SINGLE-CRYSTALS; LOW-TEMPERATURE; THIN-FILMS; GRAIN-SIZE; EFFICIENT; LAYER; DEPOSITION;

D O I：

10.1002/pssa.201800133

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A simple deposition process for preparing crystalline semiconductors with low degrees of disorder is of paramount interest for both device applications and research investigations. This study centers on the ultrasonically sprayed-aerosol based approach for preparing crystals of methylammonium lead trihalide perovskite (CH3NH3PbI3). The surface photovoltage (SPV) spectra are found to depend strongly on the preparation conditions, with the SPV signals (below the material's band gap) providing information on the defect states. The measured values of tail states near the band gap (E-t) are found to be about 21 and 52meV for the CH3NH3PbI3 crystals prepared by the ultrasonically sprayed-on and spun casting approaches, respectively.

引用

页数：8

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