Microstructure instabilities in solution-processed organic bulk-heterojunction solar cells

Li N, Zhang C, Brabec C (2018)

Publication Language: English

Publication Status: Published

Publication Type: Conference contribution, Conference Contribution

Publication year: 2018

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 2683-2687

Article Number: 8547826

Event location: Waikoloa, Hawaii US

ISBN: 9781538685297

DOI: 10.1109/PVSC.2018.8547826

Abstract

The performance of organic solar cells (OSCs) is
determined by the delicate, meticulously optimized bulkheterojunction
microstructure, which consists of finely mixed and
relatively separated donor/acceptor regions. In this work we
examine the reliability and stability of bulk-heterojunction (BHJ)
microstructures of a highly-efficiency OSC based on PCE11 as the
donor and PCBM as the acceptor. The so called burn-in
degradation is identified as a spinodal de-mixing due to the low
miscibility of donor and acceptor, which is turned out to be a major
challenge for the development of stable and efficient OSCs. Even
though the microstructure can be kinetically tuned for achieving
high-performance, the inherently low miscibility of donor and
acceptor leads to spontaneous phase separation in the solid state,
even at room temperature and in the dark. The construction of the
spinodal phase diagrams highlight molecular incompatibilities
between the donor and acceptor as a dominant mechanism for
burn-in degradation, which is to date the major short-time loss
reducing the performance and stability of organic solar cells

Authors with CRIS profile

Ning Li Institute Materials for Electronics and Energy Technology (i-MEET) Chaohong Zhang Institute Materials for Electronics and Energy Technology (i-MEET) Christoph Brabec Institute Materials for Electronics and Energy Technology (i-MEET)

How to cite

APA:

Li, N., Zhang, C., & Brabec, C. (2018). Microstructure instabilities in solution-processed organic bulk-heterojunction solar cells. In Proceedings of the 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018 (pp. 2683-2687). Waikoloa, Hawaii, US: Institute of Electrical and Electronics Engineers Inc..

MLA:

Li, Ning, Chaohong Zhang, and Christoph Brabec. "Microstructure instabilities in solution-processed organic bulk-heterojunction solar cells." Proceedings of the 7th IEEE World Conference on Photovoltaic Energy Conversion, WCPEC 2018, Waikoloa, Hawaii Institute of Electrical and Electronics Engineers Inc., 2018. 2683-2687.

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