Photoluminescence investigation of ZnO:P nanoneedle arrays on InP substrate by pulsed laser deposition |
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Authors: | DQ Yu JM Bian JX Zhu SS Qiao X Chen B Wang |
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Institution: | School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China |
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Abstract: | Phosphorus-doped ZnO nanoneedle arrays were prepared by phosphorus diffusion from InP substrate using a pulsed laser deposition (PLD) technique. The optical properties of ZnO nanoneedle were investigated by photoluminescence (PL) spectroscopy. Low-temperature photoluminescence spectrum measurements exhibited five acceptor-related emission peaks. The excitation intensity and temperature dependent photoluminescence spectra confirmed that the emission peaks corresponded to neutral-acceptor bound exciton, free electron to acceptor, donor-acceptor pairs, and their first and second photon replicas transitions. Acceptor-binding energy was determined to be 135-167 meV, which agrees well with the best-fitting result of the temperature dependent photoluminescence measurements and is reasonable in terms of theoretic prediction in ZnO. |
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Keywords: | 81 07 Bc 81 16 &minus c 61 46 Hk |
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