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Your search keyword '"Liu, YaHui"' showing total 12 results
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12 results on '"Liu, YaHui"'

11. High efficiency ternary polymer solar cells based on a fused pentacyclic electron acceptor.

Author

Feng, Shiyu, Liu, Yahui, Ming, Shouli, Lu, Heng, Ma, Danyang, Xu, Xinjun, Bo, Zhishan, Zhang, Cai'e, and Wu, Youzhi

Abstract

Nonfullerene acceptors (NFAs) with a fused-ring backbone usually tend to form large aggregations in the active layer when blended with polymer donors. One solution is to increase the steric hindrance by introducing bulky side chains onto the planar backbone; however, the enlarged intermolecular distance hampers the effective transport of electrons. Here, we provide a ternary-blend strategy to suppress the aggregation of NFAs but preserve their close π–π stacking in the nanophase. Using this method, a fused pentacyclic electron acceptor IDT-2O, which has fewer fused rings and a simpler synthetic route than commonly used heptacyclic and nonacyclic acceptors, can surprisingly demonstrate a high power conversion efficiency of 10.67%, higher than those of the corresponding binary devices. In such ternary-blend devices, PC71BM was selected as the third component to improve the film morphology and enhance the charge transport ability. As a result, increased short-circuit current and fill factors were achieved in these ternary-blend solar cells, giving rise to boosted photoelectric conversion efficiency. [ABSTRACT FROM AUTHOR]

Published
2018
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12. Elimination of the J–V hysteresis of planar perovskite solar cells by interfacial modification with a thermo-cleavable fullerene derivative.

Author

Xu, Qian, Lu, Zhen, Zhu, Lifeng, Kou, Chun, Liu, Yahui, Li, Cuihong, Meng, Qingbo, Li, Wenhua, and Bo, Zhishan

Abstract

A thermo-cleavable fullerene derivative was used as an interfacial engineering material in planar perovskite solar cells. The modified TiO2 surface shows exceptional resistance against polar solvent washing and the perovskite film grown on it was of high quality with less pinholes. Consequently, high performance devices without hysteresis have been achieved. [ABSTRACT FROM AUTHOR]

Published
2016
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