The structure-dependent quantum yield of ZnCdS nanocrystals

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Title:	The structure-dependent quantum yield of ZnCdS nanocrystals
Authors:	劉青原;Chen, Hong-Shuo;Chung, Shu-Ru;Chen, Ya-Ching;Chen, Tsan-Yao;Liu, Ching-Yuan;Wang, Kuan-Wen
Contributors:	工學院化學工程與材料工程學系
Date:	2015-07-21
Issue Date:	2026-04-21 14:37:54 (UTC+8)
Publisher:	Royal Society of Chemistry
Abstract:	摘要： In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of Zn x Cd 1− x S nanocrystals (NCs) by controlling the Zn ratios. Our results indicate that the increase in coordination number of Zn-O bonding within the NCs and the structural changes in the valence band (VB) would enhance their quantum yield (QY) due to the influence of the surface states and charge recombination rate in VB, respectively. Consequently, the Zn x Cd 1− x S NCs with an optimal x = 0.4 have the highest QY of about 56%. By combining structural and optical analysis, we systematically elucidate the effect of composition on the local structure and the charge distribution in the VB of the Zn x Cd 1− x S NCs. Thus, this study provides mechanistic insight into the development of ZnCdS NCs with high QY. In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of Zn x Cd 1- x S nanocrystals (NCs) by controlling the Zn ratios. 出版日期： 2015-06-29 資源來源： Royal Society of Chemistry 識別號： EISSN: 1466-8033 識別號： DOI: 10.1039/c5ce00746a
Appears in Collections:	[Department of Chemical and Materials Engineering] journal & Dissertation

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