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Title of Journal: J Electroceram

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Abbravation: Journal of Electroceramics

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Springer US

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DOI

10.1002/jemt.22485

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1573-8663

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Excitonic photoluminescence in CuAlSSubscript2/

Authors: Yuichiro Kuroki Ariyuki Kato Tomoichiro Okamoto Masasuke Takata
Publish Date: 2007/09/01
Volume: 21, Issue: 1-4, Pages: 378-380
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Abstract

Copper aluminum disulfide CuAlS2 powders were synthesized in the evacuated ampoule The luminescence properties of obtained powders were evaluated by photoluminescence PL at various temperatures The visible emission peaks at 216 and 190 eV and weak ultraviolet emission peak at 347 eV were obtained in the room temperature PL The temperature dependence of the PL revealed that the ultraviolet emission at room temperature was considered to be freeexciton Several emission peaks related to freeexciton boundexciton and phonons were observed in the highresolution PL at 12 K reflecting that the obtained powders had high crystallinity Emission peaks at 3459 and 3300 eV for CuAlS2 were observed for the first time The former emission might be originated from the bound exciton and the latter from the donor–acceptor pair recombination

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