Chin. Phys. Lett.  2000, Vol. 17 Issue (8): 612-614    DOI:
Original Articles |
Optical Transitions in Cubic GaN Grown by Metalorganic Chemical Vapor Deposition on GaAs (100) Substrate
CHEN Ye1;LI Guo-Hua1;HAN He-Xiang1;WANG Zhao-Ping1;XU Da-Peng2;YANG Hui2
1National Laboratory for Superlattices and Microstructures, 2National Research Center for Optoelectronic Technology, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083
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CHEN Ye, LI Guo-Hua, HAN He-Xiang et al  2000 Chin. Phys. Lett. 17 612-614
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Abstract Photoluminescence measurements have been performed on cubic GaN films with carrier concentration as low as 3x1013 cm-3. From the temperature and excitation intensity dependence, the emission lines at 3.268, 3.150 and 3.081 eV were assigned to the excitonic, donor-acceptor pair, and free-to-acceptor transitions, respectively. Additionallx we observed two additional emission lines at 2.926 and 2.821 eV, and suggested that they belong to donor-acceptor pair transitions. Furthermore, from the temperature dependence of integral intensities, we confirmed that three donor-acceptor pair transitions (3.150, 2.926, and 2.821 eV) are from a common shallow donor to three different acceptors. The excitonic emission at 3.216 eV has a full-width-at-half-maximum value of 41 meV at room temperature, which indicates a good optical quality of our sample.


Keywords: 78.66.Fd     
Published: 01 August 2000
PACS:  78.66.Fd (III-V semiconductors)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2000/V17/I8/0612
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CHEN Ye
LI Guo-Hua
HAN He-Xiang
WANG Zhao-Ping
XU Da-Peng
YANG Hui
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