X-Ray Absorption Spectroscopy Study of Structure and Stability of Disordered (Cu2SnS3)1-x(ZnS)x Alloys

被引：14

作者：

Siah, Sin Cheng ^{[1
]}

Jaramillo, R. ^{[1
]}

Chakraborty, Rupak ^{[1
]}

Erslev, Peter T. ^{[2
]}

Sun, Cheng-Jun ^{[3
]}

Weng, Tsu-Chien ^{[4
]}

Toney, Michael F. ^{[4
]}

Teeter, Glenn ^{[2
]}

Buonassisi, Tonio ^{[1
]}

机构：

[1] MIT, Cambridge, MA 02139 USA

[2] Natl Renewable Energy Lab, Golden, CO 80401 USA

[3] Argonne Natl Lab, Adv Photon Source, Argonne, IL 60439 USA

[4] Stanford Synchrotron Radiat Lightsource, Menlo Pk, CA 94025 USA

来源：

IEEE JOURNAL OF PHOTOVOLTAICS | 2015年 / 5卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Amorphous semiconductors; annealing; photovoltaic cells; thin films; SULFUR K-EDGE; CHALCOPYRITE;

D O I：

10.1109/JPHOTOV.2014.2360334

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

Secondary phase segregation is hypothesized to have detrimental impacts on Cu2ZnSnS4 (CZTS) thin-film solar cells. In this study, we demonstrate the potential of using kinetic stabilization to inhibit phase decomposition in CZTS. By growing CZTS films at low temperature, we achieve a kinetically stabilized alloy with an expanded solid solution window in the pseudoternary CuSZnS-SnS phase diagram. Using X-ray absorption spectroscopy, we study the structural evolution and stability of this metastable alloy upon annealing. For near-stoichiometric samples, we observe a continuous emergence of short-range order toward crystalline CZTS that is nearly complete after a 1-min anneal at 450 degrees C. For Zn-rich samples, we detect precipitation of ZnS upon annealing, which suggests that the excess Zn exists as cation antisite defects in metastable CZTS.

引用

页码：372 / 377

页数：6

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