Photoluminescence of Si nanoparticles synthesized using multi-hollow discharge plasma CVD

Author

Kawashima, Yuki ; Yamamoto, Kousuke ; Sato, Muneharu ; Matsunaga, Takeaki ; Nakahara, Kenta ; Yamashita, Daisuke ; Matsuzaki, Hidefumi ; Uchida, Giichiro ; Koga, Kazunori ; Shiratani, Masaharu ; Kondo, Michio

Author_Institution

Dept. of Electron., Kyushu Univ., Fukuoka, Japan

fYear

2010

fDate

21-24 Nov. 2010

Firstpage

2222

Lastpage

2224

Abstract

We have measured photoluminescence spectra of crystalline and amorphous Si nanoparticles dispersed in methanol to demonstrate exciton generation under 244nm and 405nm laser light excitation. The photoluminescence spectra have broad peaks centered at 484-500nm, indicating exciton generation in crystalline and amorphous Si nanoparticles. In addition, the peaks corresponding to the recombination centers at their surface defects are observed at 324nm-380nm. This indicates the importance of termination of surface defects on nanoparticles for application to solar cells.

Keywords

amorphous semiconductors; elemental semiconductors; excitons; nanoparticles; photoluminescence; plasma CVD; silicon; solar cells; amorphous silicon nanoparticles; crystalline silicon nanoparticles; exciton generation; laser light excitation; multihollow discharge plasma CVD; photoluminescence spectra; solar cells; surface defects; Si nanoparticles; exciton generation; photoluminescence; quantum confinment; surface termination;

fLanguage

English

Publisher

ieee

Conference_Titel

TENCON 2010 - 2010 IEEE Region 10 Conference

Conference_Location

Fukuoka

ISSN

pending

Print_ISBN

978-1-4244-6889-8

Type

conf

DOI

10.1109/TENCON.2010.5686677

Filename

5686677