Large photoluminescence redshift of ZnTe nanostructures: The effect of twin structures

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• 作者：Jiajie Guo ; Jinyou Xu ; Xiujuan Zhuang ; ^{zhuangxj@hnu.edu.cn} ; Yicheng Wang ; Hong Zhou ; Zhengping Shan ; Pinyun Ren ; Pengfei Guo ; Qinglin Zhang ; Qiang Wan ; Xiaoli Zhu ; Anlian Pan ; ^{anlian.pan@hnu.edu.cn}
• 刊名：Chemical Physics Letters
• 出版年：2013
• 出版时间：28 June, 2013
• 年：2013
• 卷：576
• 期：Complete
• 页码：26-30
• 全文大小：1611 K

文摘

In this work, ZnTe single crystalline nanowires and twinning nanobelts were synthesized to investigate the relationship between microstructure and optical properties. Power-dependent photoluminescence measurements reveal that the emission peaks of the single crystalline nanowires redshift with increasing the excitation power as a result of the band-gap renormalization effect. However, the photoluminescence redshift of the twinning nanobelts is larger than that of the nanowires, which is caused by both band-gap renormalization effect and electron-hole plasma effect induced by the increase of carrier density in the twin structure at high excitation power.