Recombination dynamics of excitons in phosphorus-doped ZnO nanostructures

Hideaki Murotani, Daiki Akase, Yoichi Yamada, Takafumi Matsumoto, Daisuke Nakamura, Tatsuo Okada

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)


The optical properties of an undoped and a P-doped ZnO nanostructures have been studied by means of photoluminescence (PL), time-resolved PL, and spatially-resolved cathodoluminescence (CL) spectroscopy. The luminescence bands due to the radiative recombination of biexcitons and the exciton-exciton scattering process were observed. The binding energy of excitons and biexcitons was estimated to be 60 and 15 meV, respectively. Radiative and nonradiative recombination lifetimes of free excitons were estimated from temperature dependence of the PL lifetime and the time-integrated PL intensity. Although the radiative recombination lifetime for each sample was almost equal, the nonradiative recombination lifetime for the P-doped sample was longer than that for the undoped sample. This result suggested that the thermal activation of nonradiative recombination process was suppressed by the P doping. CL images revealed that the intensity of the side surface was much stronger than that of the interior in the P-doped sample. This result indicated that the P impurities were distributed around the surface of the nanostructures.

ホスト出版物のタイトルTENCON 2010 - 2010 IEEE Region 10 Conference
出版ステータス出版済み - 2010
イベント2010 IEEE Region 10 Conference, TENCON 2010 - Fukuoka, 日本
継続期間: 11 21 201011 24 2010


その他2010 IEEE Region 10 Conference, TENCON 2010

All Science Journal Classification (ASJC) codes

  • 電子工学および電気工学
  • コンピュータ サイエンスの応用


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