Author
Listed:
- Guozheng Shi
(Soochow University)
- Haibin Wang
(The University of Tokyo)
- Yaohong Zhang
(The University of Electro-Communications)
- Chen Cheng
(Soochow University)
- Tianshu Zhai
(Soochow University)
- Botong Chen
(Soochow University)
- Xinyi Liu
(Northern Illinois University)
- Ryota Jono
(The University of Tokyo)
- Xinnan Mao
(Soochow University)
- Yang Liu
(Soochow University)
- Xuliang Zhang
(Soochow University)
- Xufeng Ling
(Soochow University)
- Yannan Zhang
(Soochow University)
- Xing Meng
(Soochow University)
- Yifan Chen
(Soochow University)
- Steffen Duhm
(Soochow University)
- Liang Zhang
(Soochow University)
- Tao Li
(Northern Illinois University
Argonne National Laboratory)
- Lu Wang
(Soochow University)
- Shiyun Xiong
(Soochow University)
- Takashi Sagawa
(Kyoto University)
- Takaya Kubo
(The University of Tokyo)
- Hiroshi Segawa
(The University of Tokyo)
- Qing Shen
(The University of Electro-Communications)
- Zeke Liu
(Soochow University)
- Wanli Ma
(Soochow University)
Abstract
Almost all surfaces sensitive to the ambient environment are covered by water, whereas the impacts of water on surface-dominated colloidal quantum dot (CQD) semiconductor electronics have rarely been explored. Here, strongly hydrogen-bonded water on hydroxylated lead sulfide (PbS) CQD is identified. The water could pilot the thermally induced evolution of surface chemical environment, which significantly influences the nanostructures, carrier dynamics, and trap behaviors in CQD solar cells. The aggravation of surface hydroxylation and water adsorption triggers epitaxial CQD fusion during device fabrication under humid ambient, giving rise to the inter-band traps and deficiency in solar cells. To address this problem, meniscus-guided-coating technique is introduced to achieve dense-packed CQD solids and extrude ambient water, improving device performance and thermal stability. Our works not only elucidate the water involved PbS CQD surface chemistry, but may also achieve a comprehensive understanding of the impact of ambient water on CQD based electronics.
Suggested Citation
Guozheng Shi & Haibin Wang & Yaohong Zhang & Chen Cheng & Tianshu Zhai & Botong Chen & Xinyi Liu & Ryota Jono & Xinnan Mao & Yang Liu & Xuliang Zhang & Xufeng Ling & Yannan Zhang & Xing Meng & Yifan C, 2021.
"The effect of water on colloidal quantum dot solar cells,"
Nature Communications, Nature, vol. 12(1), pages 1-12, December.
Handle:
RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-24614-7
DOI: 10.1038/s41467-021-24614-7
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