2012年9月
Broadband spectral conversion due to cooperative and phonon-assistant energy transfer from ZnO to Yb3+
Appl. Phys. B-lasers and Optics
- ,
- ,
- ,
- 巻
- 108
- 号
- 3
- 開始ページ
- 553
- 終了ページ
- 558
- 記述言語
- 英語
- 掲載種別
- DOI
- 10.1007/s00340-012-4971-3
- 出版者・発行元
- SPRINGER
The broadband spectral conversion from near-UV absorption into near-infrared emission around 1 mu m is reported in the ZnO-LiYbO2 hybrid phosphor, which is the benefit from the efficient energy transfer from ZnO to the Yb3+ ions that are specifically located at the interfacial diffusion regions between ZnO and LiYbO2, rather than those in LiYbO2 crystals. The Li+-related and Yb3+-related defect energy levels are formed inside the ZnO band gap in the ZnO-LiYbO2 hybrid phosphor; the former act as the quenching centers for the excitons in ZnO and meanwhile the efficient energy donors for Yb3+ ions, and the latter are responsible for the red shift of ZnO visible emission when the excitation energy is lower than E (g). The excitation power dependence of Yb3+ emission intensities is measured to investigate the number of photons that are involved in the energy transfer process, which reveals that there are two channels for the sensitizing of Yb3+: One is due to the energy transfer by the recombination of electrons and holes, which is a cooperative energy transfer process, and the other is via the energy feeding from the Li+-related energy levels, which is a phonon-assistant energy transfer process.
- リンク情報
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- DOI
- https://doi.org/10.1007/s00340-012-4971-3
- Web of Science
- https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000309212200013&DestApp=WOS_CPL
- URL
- http://www.scopus.com/inward/record.url?eid=2-s2.0-84868575854&partnerID=MN8TOARS
- URL
- http://orcid.org/0000-0002-7620-0119
- ID情報
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- DOI : 10.1007/s00340-012-4971-3
- ISSN : 0946-2171
- ORCIDのPut Code : 34071634
- SCOPUS ID : 84868575854
- Web of Science ID : WOS:000309212200013