Structural Transition and Band Gap Tuning of Cu2(Zn,Fe)SnS4 Chalcogenide for Photovoltaic Application

被引：96

作者：

Khadka, Dhruba B. ^{[1
]}

Kim, JunHo ^{[1
]}

机构：

[1] Incheon Natl Univ, Dept Phys, Inchon 406772, South Korea

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 26期

基金：

新加坡国家研究基金会;

关键词：

CU2ZNSNS4; THIN-FILMS; SOLAR-CELL; KESTERITE CU2ZNSNS4; STANNITE; EFFICIENCY; CU2FESNS4; SULFURIZATION; NANOCRYSTALS; ZN; DEPOSITION;

D O I：

10.1021/jp503678h

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：

Polycrystalline Cu2ZnzFe1-zSnS4 (CZFTS) thin films have been fabricated using chemical spray pyrolysis accompanied by postsulfurization. The postsulfurized CZFTS films demonstrate promising morphological, structural, and optical properties for photoabsorber in thin film photovoltaics. The structural transition from stannite to kesterite is found with the increase of zinc content in CZFTS alloy by using X-ray diffraction and Raman spectroscopy. The band gap energies of postsulfurized CZFTS films are observed to be tuned from similar to 1.36 +/- 0.02 to 1.51 +/- 0.02 eV in parabolic-increase trend with increasing Zn content (0 <= z <= 1). A small bowing constant b similar to 0.1 +/- 0.05 eV deduced from band gap bowing model implicates good miscibility of alloyed constituents in the host crystal lattice.

引用

页码：14227 / 14237

页数：11

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