Role of Copper Doping in Heavy Metal-Free InP/ZnSe Core/Shell Quantum Dots for Highly Efficient and Stable Photoelectrochemical Cell

被引：91

作者：

Zhao, Hongyang ^{[1
]}

Li, Xin ^{[1
]}

Cai, Mengke ^{[1
]}

Liu, Cheng ^{[1
]}

You, Yimin ^{[1
]}

Wang, Rui ^{[1
]}

Channa, Ali Imran ^{[1
]}

Lin, Feng ^{[1
]}

Huo, Da ^{[2
]}

Xu, Guofeng ^{[2
]}

Tong, Xin ^{[1
,3
]}

Wang, Zhiming M. ^{[1
,4
]}

机构：

[1] Univ Elect Sci & Technol China, Inst Fundamental & Frontier Sci, Chengdu 610054, Peoples R China

[2] Univ Elect Sci & Technol China, Glasgow Coll, Chengdu 611731, Peoples R China

[3] Univ Elect Sci & Technol China, Yangtze Delta Reg Inst Huzhou, Huzhou 313001, Peoples R China

[4] Natl Univ Malaysia, Inst Microengn & Nanoelect IMEN, Bangi 43600, Selangor, Malaysia

来源：

ADVANCED ENERGY MATERIALS | 2021年 / 11卷 / 31期

关键词：

colloidal quantum dots; charge carrier dynamics; Cu-doped InP; ZnSe; heavy metal-free; photoelectrochemical hydrogen generation; HYDROGEN GENERATION; CUINS2; NANOCRYSTALS; SIZE; INP; HETEROJUNCTION; PHOTOANODES; EVOLUTION; EMISSION; EMITTERS; LIGAND;

D O I：

10.1002/aenm.202101230

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

As emerging eco-friendly alternatives to traditional Cd/Pb-based quantum dots (QDs), InP/ZnSe(S) core/shell QDs have demonstrated huge potential in light-emitting technologies. So far, these QDs have been rarely employed in solar energy conversion applications due to their type-I band structure offering limited photo-induced charge carrier separation and transfer. Here, a controllable Cu shell doping approach is reported to engineer the optoelectronic properties of InP/ZnSe core/shell QDs and realize high performance and stable solar-driven photoelectrochemical (PEC) hydrogen evolution. As compared to the pristine InP/ZnSe QDs, the Cu-doped core/shell QDs exhibit enhances the photo-induced electron transfer rate due to the capture of photo-generated holes via Cu impurity states in the shell, leading to improved photocurrent density and long-term durability in as-fabricated InP/ZnSe:Cu QDs-PEC devices under standard one sun illumination. The results indicate that the doping of Cu in the shell has a preeminent effect on the optoelectronic properties of the core/shell QDs and may open up new avenues to tailor eco-friendly core/shell QDs for high performance and stable solar energy conversion.

引用

页数：10

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