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

We investigated the device durability of inverted organic solar cells (OSCs) based on Y6 which is an effective non-fullerene acceptor for high-performance OSCs. The durability of Y6-based inverted OSCs was poor and it could be caused by aggregation of Y6 in the bulk-heterojunction layer due to heating by continuous photo-irradiation (∼65°C, 100 mWcm-2 , 72 h). We 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 photo-durable near-infrared detector upon continuous laser irradiation. This article is protected by copyright. All rights reserved.