The structure-dependent quantum yield of ZnCdS nanocrystals

Hong Shuo Chen; Shu Ru Chung; Ya Ching Chen; Tsan Yao Chen; Ching Yuan Liu; Kuan Wen Wang

doi:10.1039/c5ce00746a

The structure-dependent quantum yield of ZnCdS nanocrystals

Hong Shuo Chen, Shu Ru Chung, Ya Ching Chen, Tsan Yao Chen, Ching Yuan Liu, Kuan Wen Wang

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of Zn_xCd_1-xS 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_xCd_1-xS 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_xCd_1-xS NCs. Thus, this study provides mechanistic insight into the development of ZnCdS NCs with high QY.

Original language	English
Pages (from-to)	5032-5037
Number of pages	6
Journal	CrystEngComm
Volume	17
Issue number	27
DOIs	https://doi.org/10.1039/c5ce00746a
State	Published - 21 Jul 2015

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title = "The structure-dependent quantum yield of ZnCdS nanocrystals",

abstract = "In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of ZnxCd1-xS 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 ZnxCd1-xS 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 ZnxCd1-xS NCs. Thus, this study provides mechanistic insight into the development of ZnCdS NCs with high QY.",

author = "Chen, {Hong Shuo} and Chung, {Shu Ru} and Chen, {Ya Ching} and Chen, {Tsan Yao} and Liu, {Ching Yuan} and Wang, {Kuan Wen}",

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T1 - The structure-dependent quantum yield of ZnCdS nanocrystals

AU - Chen, Hong Shuo

AU - Chung, Shu Ru

AU - Chen, Ya Ching

AU - Chen, Tsan Yao

AU - Liu, Ching Yuan

AU - Wang, Kuan Wen

PY - 2015/7/21

Y1 - 2015/7/21

N2 - In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of ZnxCd1-xS 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 ZnxCd1-xS 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 ZnxCd1-xS NCs. Thus, this study provides mechanistic insight into the development of ZnCdS NCs with high QY.

AB - In this study, we demonstrate the effect of atomic arrangement and valence band structures on the optical properties of ZnxCd1-xS 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 ZnxCd1-xS 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 ZnxCd1-xS NCs. Thus, this study provides mechanistic insight into the development of ZnCdS NCs with high QY.

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U2 - 10.1039/c5ce00746a

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M3 - 期刊論文

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VL - 17

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EP - 5037

JO - CrystEngComm

JF - CrystEngComm

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The structure-dependent quantum yield of ZnCdS nanocrystals

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