Journal article

Revealing the Interfacial Photoreduction of MoO3 with P3HT from the Molecular Weight-Dependent "Burn-In" Degradation of P3HT:PC61BM Solar Cells

Huimin Gu, Lingpeng Yan, Sonam Saxena, Xueliang Shi, Xuning Zhang, Zerui Li, Qun Luo, Huiqiong Zhou, Yongzhen Yang, Xuguang Liu, Wallace WH Wong, Chang-Qi Ma

ACS Applied Energy Materials | American Chemical Society | Published : 2020

Abstract

“Burn-in” degradation occurs in many polymer solar cells, which dramatically reduces the overall power output of the cells at the early hundred hours. Understanding the “burn-in” degradation mechanism is therefore highly important to improve the lifetime of the cell. In this article, the decay behaviors of P3HT:PC61BM solar cells depending on the molecular weight of P3HT were systematically investigated. Although all of these P3HTs were highly crystalline with regioregularity of 94–97%, the stability of P3HT:PC61BM cells showed a nonmonotonic dependence on P3HT molecular weight. The cells based on P3HT with a weight average molecular weight (Mw) of 20 K showed much faster decadence in open c..

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University of Melbourne Researchers

Grants

Awarded by Ministry of Science and Technology of China


Awarded by Chinese Academy of Science


Awarded by National Natural Science Foundation of China


Awarded by Youth Innovation Promotion Association, CAS


Awarded by Suzhou Vacuum Interconnected Nanotechnology Workstation


Awarded by ARC Centre of Excellence in Exciton Science


Funding Acknowledgements

The authors would like to acknowledge the financial support from the Ministry of Science and Technology of China (no. 2016YFA0200700), the Chinese Academy of Science (no. YJKYYQ20180029 and CAS-ITRI 2019010), the National Natural Science Foundation of China (61904121), the Youth Innovation Promotion Association, CAS (2019317), and the support of Suzhou Vacuum Interconnected Nanotechnology Workstation H005-2019 project. WWHW and SS are supported by the Australian Renewable Energy Agency through the Australian Centre for Advanced Photovoltaics as well as the ARC Centre of Excellence in Exciton Science (CE170100026).