文献类型：期刊文献

英文题名：A facile route to violet- to orange-emitting CdxZn 1-xSe alloy nanocrystals via cation exchange reaction

作者：Zhong, Xinhua[1]; Feng, Yaoyu[2]; Zhang, Yuliang[1]; Gu, Zhenyu[1]; Zou, Lei[1]

机构：[1] Laboratory for Advanced Materials, Department of Chemistry, East China University of Science and Technology, Shanghai 200237, China; [2] National Institute for Parasitic Diseases, Chinese Center for Disease Control and Prevention, 207 Ruijin No. 2 Road, Shanghai 200025, China

年份：2007

卷号：18

期号：38

外文期刊名：Nanotechnology

收录：EI(收录号：20074110853567)

语种：英文

外文关键词：Cadmium alloys - Ion exchange - Light emitting diodes - Luminescence - Semiconductor quantum dots - Thermal effects

摘要：The most advanced CdSe-based binary semiconductor system does not work well for emission in the short wavelength spectral region from 420 to 500 nm, which is of special interest for the preparation of nanocrystal-based blue LEDs and white light generation. CdxZn1-xSe alloy nanocrystals are proven to be an attractive alternative as their emission color can be tuned from the UV spectral region (ZnSe) to the red region (CdSe) by changing the composition of the Zn/Cd ratio in the alloy. Herein we report a facile and 'green' alloying approach for the preparation of highly luminescent Cd xZn1-xSe nanocrystals via cation exchange reaction of the pre-prepared ZnSe nanocrystals with Cd2+ at intermediate temperatures. Through this new synthetic strategy, high-quality alloy QDs with different desired emission wavelengths or colors (ranging from 370 to 600 nm) can be made reproducibly and precisely by varying the predetermined amounts of the reaction precursors. ? IOP Publishing Ltd.