Determination and interpretation of the optical constants for solar cell materials

被引：19

作者：

Fujiwara, Hiroyuki ^{[1
]}

Fujimoto, Shohei ^{[1
]}

Tamakoshi, Masato ^{[1
]}

Kato, Masato ^{[1
]}

Kadowaki, Hideyuki ^{[1
]}

Miyadera, Tetsuhiko ^{[2
]}

Tampo, Hitoshi ^{[2
]}

Chikamatsu, Masayuki ^{[2
]}

Shibata, Hajime ^{[2
]}

机构：

[1] Gifu Univ, Dept Elect Elect & Comp Engn, 1-1 Yanagido, Gifu 5011193, Japan

[2] Natl Inst Adv Ind Sci & Technol, Res Ctr Photovolta, Cent 5,1-1-1 Higashi, Tsukuba, Ibaraki 3058568, Japan

来源：

APPLIED SURFACE SCIENCE | 2017年 / 421卷

关键词：

Spectroscopic ellipsometry; Solar cell materials; Surface roughness; Absorption coefficient; Density functional theory; MICROSCOPIC SURFACE-ROUGHNESS; THIN-FILMS; SPECTROSCOPIC ELLIPSOMETRY; PEROVSKITES; CUINSE2; CUGASE2; SILICON; LAYERS;

D O I：

10.1016/j.apsusc.2016.09.113

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solar cell materials in thin film form often exhibit quite rough surface, which makes the accurate determination of the optical constants using spectroscopic ellipsometry (SE) quite difficult. In this study, we investigate the effect of the rough surface on the SE analysis and establish an analysis procedure, which is quite helpful for the correction of the underestimated roughness contribution. As examples, the roughness analyses for CuInSe2 and CH3NH3PbI3 hybrid-perovskite thin films are presented. Moreover, to interpret the dielectric functions of emerging solar cell materials, such as CH3NH3PbI3 and Cu2ZnSnSe4, the optical transition analyses are performed based on density functional theory (DFT). The excellent agreement observed between the experimental and DFT results allows the detailed assignment of the transition peaks, confirming the importance of DFT for revealing fundamental optical characteristics.(C) 2016 Elsevier B.V. All rights reserved.

引用

页码：276 / 282

页数：7