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Your search keyword '"Gao, Xingyu"' showing total 12 results
Start Over Author "Gao, Xingyu" Journal applied physics letters
12 results on '"Gao, Xingyu"'

1. Efficient organic solar cells with the active layer fabricated from glovebox to ambient condition

Author

Li, Hengyue, primary, Huang, Keqing, additional, Dong, Yanan, additional, Guo, Xiaotong, additional, Yang, Yu, additional, Luo, Qun, additional, Ma, Chang-Qi, additional, Li, Dongfan, additional, Lu, Guanghao, additional, Xiong, Jian, additional, Zhang, Jian, additional, Yang, Yingguo, additional, Gao, Xingyu, additional, and Yang, Junliang, additional

Published
2020
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2. Defects controlled doping and electrical transport in TiS2 single crystals

Author

Chen, Ke, primary, Song, Meng, additional, Sun, Yi-Yang, additional, Xu, Hai, additional, Qi, Dong-Chen, additional, Su, Zhenhuang, additional, Gao, Xingyu, additional, Xu, Qian, additional, Hu, Jun, additional, Zhu, Junfa, additional, Zhang, Ranran, additional, Wang, Jie, additional, Zhang, Lei, additional, Cao, Liang, additional, Han, Yuyan, additional, and Xiong, Yimin, additional

Published
2020
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4. Chemical interaction dictated energy level alignment at the N,N′-dipentyl-3,4,9,10-perylenedicarboximide/CH3NH3PbI3 interface.

Author

Zhang, Xiaonan, Su, Zhenhuang, Zhao, Bin, Yang, Yingguo, Xiong, Yimin, Gao, Xingyu, Qi, Dong-Chen, and Cao, Liang

Subjects
ELECTRONIC structure, TOXICOLOGICAL interactions, X-ray spectroscopy, FERMI level, PEROVSKITE, CHEMICAL reactions
Abstract

Here, we report the electronic structures at the N, N′-dipentyl-3,4,9,10-perylenedicarboximide (PTCDI-C5)/CH3NH3PbI3 interface identified in-situ by X-ray photoemission spectroscopy and ultraviolet photoemission spectroscopy. Strong chemical reactions are found to occur upon the deposition of PTCDI-C5 molecules on CH3NH3PbI3. Electron donation from PTCDI-C5 molecules to CH3NH3PbI3 leads to the filling of surface states and the emergence of an interfacial gap state with its onset tailed to the Fermi level. As a consequence, the downward surface band bending resulting from surface states acting as donor states at the pristine perovskite surface is reduced by 0.2 eV. After the energy level alignment at the interface is established, the perovskite conduction band minimum is found to be in line with the lowest unoccupied molecular orbital favoring the electron extraction with a moderate valence band maximum-highest occupied molecular orbital offset of ∼0.7 eV. The present results demonstrate that interfacial chemical reactions can dictate energetics at organic/perovskite interfaces. Understanding the chemical interaction and resultant electronic structures at those interfaces is crucial for efficient and long-term stable perovskite-based devices when passivation of chemical active sites and matched energy level could be readily reached. [ABSTRACT FROM AUTHOR]

Published
2018
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12. Electric field induced monoclinic phase in (Na0.52K0.48)(Nb1-ySby)O3 ceramics close to the rhombohedral-orthorhombic polymorphic phase boundary.

Author

Fu, Jian, Zuo, Ruzhong, and Gao, Xingyu

Subjects
ELECTRIC fields, THERMAL stability, DIELECTRIC measurements, ELECTRONIC ceramics, PHASE transitions
Abstract

The electric field induced structural transformation in (Na0.52K0.48)(Nb1-ySby)O3 ceramics near the rhombohedral (R)-orthorhombic (O) phase boundary was investigated by means of ex-situ and in-situ synchrotron x-ray diffraction and dielectric measurements. An intermediate monoclinic (M) phase was irreversibly induced from the O phase by poling, leading to a modified polarization rotation path along R-M-O. By comparison, the reversibility of R-M phase transition would cause the phase instability. Both aspects were believed to be responsible for the high piezoelectric activity near the R-O phase boundary. Moreover, enhanced piezoelectric properties were also found to correlate with the thermal stability of the induced M phase. [ABSTRACT FROM AUTHOR]

Published
2013
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