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Your search keyword '"Zhao, Yingjie"' showing total 22 results
Start Over Author "Zhao, Yingjie" Journal acs applied materials & interfaces
22 results on '"Zhao, Yingjie"'

20. Graphdiyne-Doped P3CT-K as an Efficient Hole-Transport Layer for MAPbI3Perovskite Solar Cells

Author

Li, Jiangsheng, Zhao, Min, Zhao, Chengjie, Jian, Hongmei, Wang, Ning, Yao, Lili, Huang, Changshui, Zhao, Yingjie, and Jiu, Tonggang

Abstract

Here we reported the doping of graphdiyne in P3CT-K in MAPbI3perovskite solar cells as hole-transport materials. The doping could improve the surface wettability of P3CT-K, and the resulting perovskite morphology was improved with homogeneous coverage and reduced grain boundaries. Simultaneously, it increased the hole-extraction mobility and reduced the recombination as well as improved the performance of devices. Therefore, a high efficiency of 19.5% was achieved based on improved short-circuit current and fill factor. In addition, hysteresis of the J–Vcurve was also obviously reduced. This work paves the way for the development of highly efficient perovskite solar cells.

Published
2019
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21. Interfacial Synthesis of Conjugated Two-Dimensional N-Graphdiyne

Author

Kan, Xiaonan, Ban, Yanqi, Wu, Chenyu, Pan, Qingyan, Liu, Hui, Song, Jianhui, Zuo, Zicheng, Li, Zhibo, and Zhao, Yingjie

Abstract

We explored the interfacial synthesis of 2D N-graphdiyne films at the gas/liquid and liquid/liquid interfaces. Triazine- or pyrazine-based monomers containing ethynyl group were polymerized through the Glaser coupling reactions at interfaces. Several layered, highly ordered and conjugated 2D N-graphdiyne were obtained. Their structures were characterized by TEM, SEM, AFM, XPS, and Raman spectra. Thin films with minimum thickness of 4 nm could be prepared.

Published
2018
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22. Controlled Synthesis of a Three-Segment Heterostructure for High-Performance Overall Water Splitting

Author

Hui, Lan, Xue, Yurui, Jia, Dianzeng, Zuo, Zicheng, Li, Yongjun, Liu, Huibiao, Zhao, Yingjie, and Li, Yuliang

Abstract

Developing earth-abundant, highly active, and robust electrocatalysts capable of both oxygen and hydrogen evolution reactions is crucial for the commercial success of renewable energy technologies. Here we demonstrate a facile and universal strategy for fabricating transition metal (TM) sulfides by controlling the atomic ratio of TM precursors for water splitting in basic media. Density functional theory calculations reveal that the incorporation of Fe/Co can significantly improve the catalytic performance. The optimal material exhibits extremely small overpotentials of 208 mV for oxygen evolution and 68 mV for hydrogen evolution at 10 mA cm–2with robust long-term stability. The optimized material was used as bifunctional electrodes for overall water splitting, which delivers 10 mA cm–2at a very low cell voltage of 1.44 V with robust stability over 80 h at 100 mA cm–2without degradation, much better than the combination of Pt and RuO2as benchmark catalysts. The excellent water-splitting performance sheds light on the promising potential of such sulfides as high activity and robust stable electrodes.

Published
2017
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