Lead-free germanium iodide perovskite materials for photovoltaic applications

被引：950

作者：

Krishnamoorthy, Thirumal ^{[1
]}

Ding, Hong ^{[2
]}

Yan, Chen ^{[1
,3
]}

Leong, Wei Lin ^{[4
]}

Baikie, Tom ^{[1
]}

Zhang, Ziyi ^{[2
]}

Sherburne, Matthew ^{[2
]}

Li, Shuzhou ^{[3
]}

Asta, Mark ^{[2
]}

Mathews, Nripan ^{[1
,3
,4
]}

Mhaisalkar, Subodh G. ^{[1
,3
]}

机构：

[1] Energy Res Inst NTU ERI N, Singapore 637553, Singapore

[2] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[3] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[4] ASTAR, IMRE, Singapore 117602, Singapore

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2015年 / 3卷 / 47期

基金：

新加坡国家研究基金会;

关键词：

PHASE;

D O I：

10.1039/c5ta05741h

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：

Computational screening based on density-functional-theory calculations reveals Ge as a candidate element for replacing Pb in halide perovskite compounds suitable for light harvesting. Experimentally, three AGeI(3) (A = Cs, CH3NH3 or HC(NH2)(2)) halide perovskite materials have been synthesized. These compounds are stable up to 150 degrees C, and have bandgaps correlated with the A-site cation size. CsGeI3-based solar cells display higher photocurrents, of about 6 mA cm(-2), but are limited by poor film forming abilities and oxidising tendencies. The present results demonstrate the utility of combining computational screening and experimental efforts to develop lead-free halide perovskite compounds for photovoltaic applications.

引用

页码：23829 / 23832

页数：4

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