Controllable bandgap of Cu2ZnSn(S,Se)4 thin films via simultaneous supercritical fluid chalcogenization

被引：8

作者：

Nakayasu, Yuta ^{[1
]}

Tomai, Takaaki ^{[1
]}

Oka, Nobuto ^{[1
]}

Honma, Itaru ^{[1
]}

机构：

[1] Tohoku Univ, Inst Multidisciplinary Res Adv Mat, Sendai, Miyagi 9808577, Japan

来源：

APPLIED PHYSICS EXPRESS | 2015年 / 8卷 / 02期

关键词：

OPTICAL-PROPERTIES; SELENIZATION; PRECURSORS; SULFURIZATION; CUINSE2; ETHANOL;

D O I：

10.7567/APEX.8.021201

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Supercritical ethanol (scEtOH), with its high solubility and reducibility, can be used as a medium to fabricate chalcogenide semiconductors from stable solid chalcogen sources. We fabricated Cu2ZnSn(S,Se)(4) films via chalcogenization of Cu-Zn-Sn oxide precursor films using scEtOH to dissolve SeO2 and elemental sulfur (S-8). The S/Se molar ratio and the bandgap of Cu2ZnSn(S,Se)(4) films were controlled by changing the input ratio of selenium source (SeO2) to sulfur source (S-8). Analysis indicated that high-density atomic chalcogens are the dominant reactive species. This process may contribute to the development of non-vacuum fabrication methods for chalcogenide-semiconductor solar cells. (C) 2015 The Japan Society of Applied Physics

引用

页数：4

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