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Emissions from Deep Levels in Hydrothermal Grown ZnO Substrates
Satoru Seto,Satoru Yamada,Kazuhiko Suzuki,Kenji Yoshino 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.53 No.5
Undoped ZnO single-crystal substrates grown by using the hydrothermal method purchased from Tokyo Denpa Co. Ltd. (Japan) and SPC Goodwill Co. Ltd. (Russia) have been evaluated using low-temperature photoluminescence measurements. The broad deep emission bands in the two kinds of substrates can be decomposed into two Gaussian peaks: one located at 2.1 - 2.2 eV and the other at 2.4 - 2.5 eV, which are called the yellow band and the green band, respectively. the temperature dependence of the peak energy of the broad band could be explained by using the dierence between the temperature quenching rates of the green and the yellow bands.
Polarized Raman spectroscopy of Cu-poor and Zn-rich single-crystal Cu<sub>2</sub>ZnSnSe<sub>4</sub>
Nam, Dahyun,Kim, Jungcheol,Lee, Jae-Ung,Nagaoka, Akira,Yoshino, Kenji,Cha, Wonsuk,Kim, Hyunjung,Hwang, In Chul,Yoon, Kyung Byung,Cheong, Hyeonsik American Institute of Physics 2014 APPLIED PHYSICS LETTERS Vol.105 No.17