Complete composition tunability of Cd_{1?pan style='font-style: italic'>x}Zn_xTe alloy nanostructures along a single substrate

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• 作者：Yicheng Wang ; Jinyou Xu ; Pinyun Ren ; Xiujuan Zhuang ; Hong Zhou ; Qinglin Zhang ; Xiaoli Zhu ; Anlian Pan
• 关键词：Nanocrystalline materials ; Alloy nanowires ; Optical materials and properties ; Cd1&minus ; xZnxTe ; Bandgap-tunable
• 刊名：Materials Letters
• 出版年：2013
• 出版时间：15 August, 2013
• 年：2013
• 卷：105
• 期：Complete
• 页码：90-94
• 全文大小：1501 K

文摘

Semiconductor alloy nanostructures with tunable compositions provide excellent material platforms for function-tunable and/or broadband-response optoelectronic applications. Here we report the growth of high quality single-crystalline Cd_1-xZn_xTe alloy nanostructures in the full-composition region on a single substrate via a simple co-thermal evaporation route. X-ray diffraction (XRD) and transmission electron microscopy (TEM) characterizations confirm that the lattice parameters gradually increase with the increase of cadmium contents. Photoluminescence (PL) measurements show that these composition-tunable alloy nanostructures exhibit near-bandedge emissions, with peaks wavelength continuously changing from 554 nm to 819 nm. These alloy nanostructures will find potential applications in near-infrared function-tunable optoelectronic devices, such as high-performance laterally-arranged multiple-bandgap solar cells, variable-wavelength photodetectors and so on.