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首页> 外文期刊>Optical Materials >Structural And Photo Luminescent Properties Of Uncapped Nanocrystalline Cd_(1-x)zn_xs Solid Solutions
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Structural And Photo Luminescent Properties Of Uncapped Nanocrystalline Cd_(1-x)zn_xs Solid Solutions

机译：未封端的纳米Cd_（1-x）zn_xs固溶体的结构和光致发光性质

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摘要

Uncapped nanocrystalline Cd_(1-x)Zn_xS (0.0 ≤ x ≥ 0.5) solid solution prepared by microwave assisted combustion route shows hexagonal to cubic phase transformation for even low doping of zinc up to 5 at.% as evident from the X-ray diffraction patterns and the selected area electron diffraction patterns. The solid solutions show a considerable shift in the optical absorption edge from ～2.43 eV (CdS) to ～2.73 eV for the equi-atomic composition (Cd_(0.5)Zn_(0.5)S). The blue emission in CdS shows effect of quantum confinement. The photo luminescence spectra of Zn lean compositions (up to 5 at.%) show emergence of a peak at λ ～ 530 nm along with the blue emission features of CdS. However, solid solutions with higher zinc content (up to 50 at.%), show a systematic increase in the intensity of peak at 530 nm with a blue shift up to 30 at.% of zinc doping. Beyond 30%, a broad blue-green emission with full width at half maxima of ～ 100 nm for Cd_(0.5)Zn_(0.5)S is observed.
机译：X射线衍射表明，通过微波辅助燃烧路线制备的无盖纳米晶Cd_（1-x）Zn_xS（0.0≤x≥0.5）固溶体显示出六方相到立方相的转变，即使锌的掺杂量低至5 at。％图案和选定区域的电子衍射图案。对于等原子组成（Cd_（0.5）Zn_（0.5）S），固溶体显示出光吸收边缘从〜2.43 eV（CdS）到〜2.73 eV发生了很大变化。 CdS中的蓝色发射显示出量子约束效应。贫锌组合物（高达5 at。％）的光致发光光谱显示，在λ〜530 nm处出现一个峰值，并伴随CdS的蓝色发射。然而，具有较高锌含量（最高50 at。％）的固溶体显示出在530 nm处峰强度的系统性增加，并且蓝移最多达到锌掺杂的30 at。％。超过30％时，对于Cd_（0.5）Zn_（0.5）S观察到宽广的蓝绿色发射，半峰全宽约为100 nm。

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