Near-infrared photoluminescence of PbS QDs precipiated in the glass matrix(<Feature>Glass and Ceramic Materials for Photonics)
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概要
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Optical properties of PbS quantum dots (QDs) precipitated inside the oxide glass matrix were investigated. Photoluminescence (PL) spectra were recorded with peak wavelengths located at 1170-1680nm with peak width of 150-500nm. Radii of QDs in glasses were 2.0-3.7nm depending upon the thermal treatment conditions. Changes in temperatures and excitation intensities resulted in the shift of photoluminescence bands as large as 70nm, due to the laser-induced local heating. Photoluminescence from PbS QDs showed darkening and brightening behavior. Intensity of the photoluminescence increased with time at low temperature (<150K) especially when the excitation intensity was low. Photo-darkening was observed when temperature and/or illumination intensities increased. Competition between the photo-brightening and photo-darkening determined the final steady-state photoluminescence intensity.
- 社団法人日本セラミックス協会の論文
- 2008-10-01
著者
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Heo Jong
Center For Information Materials Department Of Materials Science And Engineering Pohang University O
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Heo Jong
Department Of Materials Science And Engineering Pohang University Of Science And Technology (postech
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LIU Chao
Center for Information Materials, Department of Materials Science and Engineering, Pohang University
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KWON Yong
Center for Information Materials, Department of Materials Science and Engineering, Pohang University
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Liu Chao
Center For Information Materials Department Of Materials Science And Engineering Pohang University O
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Kwon Yong
Center For Information Materials Department Of Materials Science And Engineering Pohang University O
関連論文
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- Near-infrared photoluminescence of PbS QDs precipiated in the glass matrix(Glass and Ceramic Materials for Photonics)
- Near-infrared photoluminescence of PbS QDs precipitated in the glass matrix