Optical spectroscopy reveals transition of CuInS2/ZnS to CuxZn1−xInS2/ZnS:Cu alloyed quantum dots with resultant double-defect luminescence | Zendy

Ruolin Yan | Zendy; Wenxia Zhang | Zendy; Wenhui Wu | Zendy; Xingmin Dong | Zendy; Qiqi Wang | Zendy; Jiyang Fan | Zendy

Open Access

Optical spectroscopy reveals transition of CuInS2/ZnS to CuxZn1−xInS2/ZnS:Cu alloyed quantum dots with resultant double-defect luminescence

Author(s) -

Ruolin Yan,

Wenxia Zhang,

Wenhui Wu,

Xingmin Dong,

Qiqi Wang,

Jiyang Fan

Publication year - 2016

Publication title -

apl materials

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.571

H-Index - 60

ISSN - 2166-532X

DOI - 10.1063/1.4971353

Subject(s) - materials science , quantum dot , photoluminescence , luminescence , spectroscopy , absorption (acoustics) , optoelectronics , doping , blueshift , epitaxy , absorption edge , absorption spectroscopy , photochemistry , nanotechnology , band gap , optics , chemistry , physics , layer (electronics) , quantum mechanics , composite material

The structure and luminescence mechanisms of the CuInS2 quantum dots (QDs) after epitaxial growth of ZnS shell are in debate. The light absorption/emission spectroscopy reveals that after ZnS shell growth the cation diffusion at the CuInS2/ZnS interface results in formation of the alloyed CuxZn1− xInS2/ZnS:Cu QDs. These core/shell QDs exhibit dual-color photoluminescence with abnormal blue shift with decreasing excitation photon energy. The results show that the green and orange emissions originate separately from defects in the core and the shell. The absorption tail of the ZnS QDs turns from Urbach to Halperin-Lax type after Cu doping

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