Investigation of Degradation Mechanism of Y6-Based Inverted Organic Solar Cells and Their Utilization in Durable Near-Infrared Photodetection

Naoya Tanaka; Masahiro Nakano; Tomoki Kobayashi; Akira Takahara; Takahiro Fujinuki; Md Shahiduzzaman; Makoto Karakawa; Tetsuya Taima; Koichi Iiyama

doi:10.1002/marc.202100718

Investigation of Degradation Mechanism of Y6-Based Inverted Organic Solar Cells and Their Utilization in Durable Near-Infrared Photodetection

Macromol Rapid Commun. 2022 Feb;43(4):e2100718. doi: 10.1002/marc.202100718. Epub 2021 Dec 26.

Authors

Naoya Tanaka¹, Masahiro Nakano¹, Tomoki Kobayashi¹, Akira Takahara¹, Takahiro Fujinuki¹, Md Shahiduzzaman², Makoto Karakawa^{1

2

3}, Tetsuya Taima^{1

2

3}, Koichi Iiyama⁴

Affiliations

¹ Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan.
² Nanomaterials Research Institute (NanoMaRi), Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan.
³ Institute for Frontier Science Initiative (InFiniti), Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan.
⁴ Division of Electrical Engineering and Computer Science, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa, 920-1192, Japan.

PMID: 34882880
DOI: 10.1002/marc.202100718

Abstract

The device durability of inverted organic solar cells (OSCs) is investigated based on Y6, which is an effective nonfullerene acceptor for high-performance OSCs. The durability of Y6-based inverted OSCs is poor and it can be caused by aggregation of Y6 in the bulk-heterojunction layer due to heating by continuous photo-irradiation (≈65 °C, 100 mW cm^-2 , and 72 h). It is found that the aggregation of Y6 is suppressed at a low temperature (≈50 °C), and that the Y6-based devices can be useful as a photodurable near-infrared detector upon continuous laser irradiation.

Keywords: device durability; nonfullerene acceptors; organic photoelectronic devices.