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Spatially direct charged exciton photoluminescence in undoped ZnSe/BeTe type-II quantum wells

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6 Author(s)
Ji, Z.W. ; Institute for Solid State Physics, University of Tokyo, Kashiwa, 277-8581, Japan ; Takeyama, S. ; Mino, H. ; Oto, K.
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Photoluminescence (PL) spectra occurred as a spatially direct optical transition inside of the ZnSe layer in undoped ZnSe/BeTe/ZnSe type-II quantum structures have been studied. We have found that the charged exciton transition was observed at the lower energy side of the exciton transition in the spatially direct PL. The formation of the charged exciton was attributed to the accumulated electrons in the ZnSe layer after the photoexcitation accompanied by the holes being escaped from this well and injected into the BeTe layer.

Published in:

Applied Physics Letters  (Volume:92 ,  Issue: 9 )

Date of Publication:

Mar 2008

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