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12 results on '"Cai, Yunhao"'

5. High‐Performance Non‐Fullerene Organic Solar Cells Based on a Selenium‐Containing Polymer Donor and a Twisted Perylene Bisimide Acceptor

Author

Liu, Tao, Meng, Dong, Cai, Yunhao, Sun, Xiaobo, Li, Yan, Huo, Lijun, Liu, Feng, Wang, Zhaohui, Russell, Thomas P, and Sun, Yanming

Subjects
Engineering, Macromolecular and Materials Chemistry, Materials Engineering, Chemical Sciences, organic solar cells, perylene bisimide acceptor, polymer donor, power conversion efficiency
Abstract

A novel polymer donor (PBDTS-Se) is designed to match with a non-fullerene acceptor (SdiPBI-S). The corresponding solar cells show a high efficiency of 8.22%, which result from synergetic improvements of light harvesting, charge carrier transport and collection, and morphology. The results indicate that rational design of novel donor materials is important for non-fullerene organic solar cells.

Published
2016

9. High-Efficiency and Low-Energy-Loss Organic Solar Cells Enabled by Tuning Conformations of Dimeric Electron Acceptors

Author

Gu, Xiaobin, primary, Wei, Yanan, additional, Yu, Na, additional, Qiao, Jiawei, additional, Han, Ziyang, additional, Lin, Qijie, additional, Han, Xiao, additional, Gao, Jinhua, additional, Li, Congqi, additional, Zhang, Jianqi, additional, Hao, Xiaotao, additional, Wei, Zhixiang, additional, Tang, Zheng, additional, Cai, Yunhao, additional, Zhang, Xin, additional, and Huang, Hui, additional

Published
2023
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10. Phase change-regulated nonlinear optical properties of GeSb4Te7 films prepared by RF magnetron sputtering.

Author

Lv, Mengqi, Zou, Yiyun, Song, Xiaoxiao, Zhang, Shubo, Zhang, Tengfei, Liu, Zhen, Cai, Yunhao, Zhang, Xintong, Wei, Shenjin, Hu, Ertao, Zheng, Yuxiang, and Li, Jing

Subjects
RADIOFREQUENCY sputtering, OPTICAL properties, ABSORPTION coefficients, MAGNETRON sputtering, PHASE transitions, PASSIVE components, LOGIC circuits
Abstract

Novel passive devices such as all-optical diodes and all-optical logic gates require materials with appropriate both saturable and reverse saturable absorption properties. In this work, a series of GeSb4Te7 films were prepared by radio frequency magnetron sputtering and annealed at different temperatures to induce phase changes. Open-aperture Z-Scan experiments revealed that GeSb4Te7 films featured a large nonlinear absorption coefficient that varied with the extent of phase change induced by the annealing temperature. To understand the underlying reason, a three-level model was developed to explain the competition between ground-state absorption and excited-state absorption during the process. The large nonlinear absorption coefficient of GeSb4Te7 films ( β eff = - 20368.90 cm/GW) shows that ternary material demonstrates outstanding nonlinear optical absorption capability. Impressively, the annealing treatment induced microstructural changes in the GeSb4Te7 films that caused a transition from reverse saturable absorption to saturable absorption, offering great potential for innovative passive nonlinear optical devices. [ABSTRACT FROM AUTHOR]

Published
2023
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12. An Optimized Fibril Network Morphology Enables High‐Efficiency and Ambient‐Stable Polymer Solar Cells

Author

Song, Jiali, primary, Ye, Linglong, additional, Li, Chao, additional, Xu, Jinqiu, additional, Chandrabose, Sreelakshmi, additional, Weng, Kangkang, additional, Cai, Yunhao, additional, Xie, Yuanpeng, additional, O'Reilly, Padraic, additional, Chen, Kai, additional, Zhou, Jiajia, additional, Zhou, Yi, additional, Hodgkiss, Justin M., additional, Liu, Feng, additional, and Sun, Yanming, additional

Published
2020
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