著者
Tanaka Masanori Sawai Shinya Sengoku Masaya Kato Manabu Masumoto Yasuaki 舛本 泰章
出版者
American Institute of Physics
雑誌
Journal of applied physics (ISSN:00218979)
巻号頁・発行日
vol.87, no.12, pp.8535-8540, 2000-06
被引用文献数
30

Nanocrystalline particles of ZnS:(Ag, Al) semiconductor phosphor, whose sizes are mostly 3–5 nm in diameter, are prepared by the gas-evaporation method with cw CO2 laser heating. The Raman scattering spectrum as well as the transmission electron microscope observation demonstrates that the crystallization of the nanoparticles was caused successfully through the gas-phase condensation. Under irradiation of ultraviolet light, the nanoparticles exhibit blue luminescence, as in the case of the starting material of ZnS:(Ag, Al) bulk powder. The peak of the luminescence spectrum of the nanoparticles shifts to lower energy with increasing delay time and also with decreasing excitation intensity, showing that the luminescence originates from the donor–acceptor pair recombination. However, it is concluded that the luminescence of the nanoparticles is not ascribed to the blue Ag luminescence mechanism responsible for the luminescence of the bulk powder, by taking into account the spatial confinement of an electron trapped at the donor and a hole at the acceptor. It is argued that the luminescence mechanism of the nanoparticles is the so called self-activated luminescence, which involves zinc vacancies.

1 0 0 0 OA 光るシリコン

著者
金光 義彦 小川 哲生 舛本 泰章
出版者
一般社団法人 日本物理学会
雑誌
日本物理学会誌 (ISSN:00290181)
巻号頁・発行日
vol.49, no.12, pp.979-986, 1994-12-05 (Released:2008-04-14)
参考文献数
43

電子工学・固体物理学・無機化学の各分野で一大研究領域を形成しているシリコンに,ある発見がきっかけとなって新たな研究分野が生まれた.ちょうどこれらの境界領域にある新分野のキーワードは「光るシリコン」である.可視光の波長領域で非常に強く光る,この魅惑的な「光るシリコン」をなるべく易しく紹介することにしよう.