镉锌合金化的铜铟硫纳米晶体及其光学性质。
Cadmium and Zinc Alloyed Cu-In-S Nanocrystals and Their Optical Properties.
作者信息
Huang Liming, Zhu Xiaoshan, Publicover Nelson G, Hunter Kenneth W, Ahmadiantehrani Mojtaba, de Bettencourt-Dias Ana, Bell Thomas W
机构信息
Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, USA ; Biomedical Engineering Program, University of Nevada, Reno, NV, USA ; Department of Microbiology, University of Nevada, Reno, NV, USA.
Department of Electrical and Biomedical Engineering, University of Nevada, Reno, NV, USA ; Biomedical Engineering Program, University of Nevada, Reno, NV, USA.
出版信息
J Nanopart Res. 2013 Nov 1;15(11). doi: 10.1007/s11051-013-2056-9.
Abstract
Cadmium (Cd) and zinc (Zn) alloyed copper-indium-sulfide (Cu-In-S or CIS) nanocrystals (NCs) in several nanometers were prepared using thermal decomposition methods, and the effects of Cd and Zn on optical properties, including the tuning of NC photoluminescence (PL) wavelength and quantum yield (QY), were investigated. It was found that incorporation of Cd into CIS enhances the peak QY of NCs whereas zinc alloying diminishes the peak. In contrast with Zn alloying, Cd alloying does not result in a pronounced luminescence blue shift. The further PL decay study suggests that Cd alloying reduces surface or intrinsic defects whereas alloying with Zn increases the overall number of defects.
摘要
采用热分解法制备了几纳米的镉（Cd）和锌（Zn）合金化的铜铟硫化物（Cu-In-S或CIS）纳米晶体（NCs），并研究了Cd和Zn对光学性质的影响，包括NC光致发光（PL）波长的调谐和量子产率（QY）。研究发现，将Cd掺入CIS中可提高NCs的峰值QY，而锌合金化则会降低峰值。与锌合金化相反，镉合金化不会导致明显的发光蓝移。进一步的PL衰减研究表明，镉合金化减少了表面或固有缺陷，而与锌合金化则增加了缺陷的总数。
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