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

摘要

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.