题目：

The Effect of Water on Colloidal Quantum Dot Solar Cells

作者：

Guozheng Shi,¹Haibin Wang,²Yaohong Zhang,³ Chen Cheng,¹ Tianshu Zhai,¹ Botong Chen,¹ Xinyi Liu,⁴Ryota Jono,² Xinnan Mao,¹ Yang Liu,¹ Xuliang Zhang,¹ Xufeng Ling,¹ Yannan Zhang,¹ Xing Meng,¹ Yifan Chen,¹Steffen Duhm,¹ Liang Zhang,¹ Tao Li,^4,5 Lu Wang,¹ Shiyun Xiong,¹ Takashi Sagawa,⁶ Takaya Kubo,² Hiroshi Segawa,² Qing Shen,³ Zeke Liu,^1,* and Wanli Ma^1,*

单位：

¹ Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, 199 Ren'ai Road, Suzhou, 215123, Jiangsu, PR China.

² Research Center for Advanced Science and Technology, The University of Tokyo, 4-6-1, Komaba, Meguro-ku, Tokyo 153-8904, Japan.

³ Faculty of Informatics and Engineering, The University of Electro-Communications, Tokyo 182-8585, Japan.

⁴ Department of Chemistry and Biochemistry, Northern Illinois University, 1425 W. Lincoln Hwy., DeKalb, IL, 60115, USA.

⁵ X-ray Science Division, Argonne National Laboratory, 9700 South Cass Avenue, Lemont, Illinois 60439, USA.

⁶ Graduate School of Energy Science, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto, 606-8501, Japan.

摘要：

Almost all surfaces sensitive to the ambient environment are covered by water, whereas the impacts of water on surface-dominated semiconductor colloidal quantum dot (CQD) 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 further extrude ambient water, improving device performance and thermal stability. Our works not only elucidate water involved PbS CQD surface chemistry, but may also achieve a comprehensive understanding of the impact of ambient water on CQD based electronics.

影响因子：

14.92

分区情况：

一区

链接：

https://www.nature.com/articles/s41467-021-24614-7.pdf