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Formation of Heterojunction Networks in the Photoelectrical Glass–Ceramics: A Thermal Analysis
Author(s) -
Xu Yang,
Fan Bo,
Xue Bai,
Zhang Xianghua,
Luo Zhongkuan,
Shen Qianhong,
Ma Hongli
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14290
Subject(s) - differential scanning calorimetry , crystallization , materials science , eutectic system , ceramic , heterojunction , glass ceramic , mineralogy , analytical chemistry (journal) , chemical engineering , composite material , microstructure , optoelectronics , chemistry , thermodynamics , physics , chromatography , engineering
The photoelectrical glass–ceramics GeSe 2 –Sb 2 Se 3 –CuI which contain self‐organized heterojunction networks is a novel and promising photovoltaic material. Here, a series of these glass–ceramics with gradually changed GeSe 2 /Sb 2 Se 3 ratios are studied. The composition dependence of the crystallization behavior is analyzed by differential scanning calorimetry and compared with the composition dependence of the photoelectrical properties. It is revealed that the glass–ceramics with evident photoelectrical response show two common features in differential scanning calorimetry curves: an overlapping crystallization peak attributed to the coprecipitation of Cu 2 GeSe 3 and Sb 2 Se 3 , and peak profiles showing the characteristics of direct impingement growth. Based on these results, it is concluded that the formation of the heterojunction networks in the photoelectrical glass–ceramics is ascribed to the kinetically allowed eutectoid crystallization of Cu 2 GeSe 3 and Sb 2 Se 3 .