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Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells

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Abstract

In recent years, the nanostructure for solar cells have attracted considerable attention from scientists as a result of a promising candidate for low cost devices. In this work, quantum dots sensitized solar cells with effective performance based on a co-sensitized CdS/CdSe:Mn2+ (or Cu2+) nanocrystal, which was made by successive ionic layer absorption and reaction, are discussed. The optical, physical, chemical, and photovoltaic properties of quantum dots sensitized solar cells were sensitized to Mn2+ and Cu2+ dopants. Therefore, the short current (JSC) of the quantum dot sensitized solar cells is boosted dramatically from 12.351 mA/cm2 for pure CdSe nanoparticles to 18.990 mA/cm2 for Mn2+ ions and 19.915 mA/cm2 for Cu2+ ions. Actually, metal dopant extended the band gap of pure CdSe nanoparticles, reduced recombination, enhanced the efficiency of devices, and improved the charge transfer and collection. In addition, Mn2+ and Cu2+ dopants rose to the level of the conduction band of pure CdSe nanoparticles, which leads to the reduction of the charge recombination, enhances the light-harvesting efficiency, and improves the charge diffusion and collection. The results also were confirmed by the obtained experimental data of photoluminescence decay and electrochemical impedance spectroscopy.

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DOI:10.3788/col201816.072501

所属栏目:Optoelectronics

收稿日期:2018-03-14

录用日期:2018-05-08

网络出版日期:2018-07-02

作者单位    点击查看

Ha Thanh Tung:Institute of Research and Development, Duy Tan University, Da Nang, Vietnam
Dang Huu Phuc:Theoretical Physics Research Group, Advanced Institute of Materials Science, Ton Duc Thang University, Ho Chi Minh City, VietnamFaculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam

联系人作者:Dang Huu Phuc(danghuuphuc@tdt.edu.vn)

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引用该论文

Ha Thanh Tung, Dang Huu Phuc, "Optical properties and dynamic process in metal ions doped on CdSe quantum dots sensitized solar cells," Chinese Optics Letters 16(7), 072501 (2018)

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