Hu, D., Tang, H., Karuthedath, S., Chen, Q., Chen, S., Khan, J. I., Liu, H., Yang, Q., Gorenflot, J., Petoukhoff, C. E., Duan, T., Lu, X., Laquai, F., Lu, S.,
Adv. Funct. Mater. 2022, 2211873.
doi.org/10.1002/adfm.202211873
Abstract
The commercial viability of all-small-molecule (ASM) organic solar cells (OSCs) requires high efficiency, long-term stability, and low-cost production.
However, satisfying all these factors at the same time remains highly challenging. Herein, a volatile solid additive, namely, 1,8-dichloronaphthalene (DCN) is demonstrated to simultaneously enhance the power conversion efficiency (PCE) and the storage, thermal as well as photo stabilities of oligothiophene ASM-OSCs with concise and low-cost syntheses.
The improved PCEs are mainly due to the DCN-induced morphology control with improved exciton dissociation and reduced non-geminate recombination. Notably, the PCE of 16.0% stands as the best value for oligothiophene ASM-OSCs and is among the top values for all types of binary ASM-OSCs. In addition, devices incorporating DCN have shown remarkable long-term stability, retaining over 90% of their initial PCE after dark storage aging of 3000 h and thermal or light stressing of 500 h.
The findings demonstrate that the volatile-solid-additive strategy can be a simple yet effective method of delivering highly efficient and stable oligothiophene ASM-OSCs with excellent commercial viability.
The 1D numerical drift-diffusion module of Setfos was used to simulate the O-ASM-OSCs device J–V characteristics.
Our team purchased the optical and electrical modules of Setfos in July 2020. The operation interface of the software is intuitive, friendly, and easy to operate. The software itself contains rich information within a large material database. In the OLED device simulation process, we can simulate the emission spectrum of OLED, and simultaneously the recombination zone of charge transfer and drift spread. It can also help us to modify the design of device structure and can effectively analyze and improve the OLED device efficiency. The results calculated by Setfos could be served as a good reference point for our scientific research. We would highly recommend you consider Setfos as the option.
Dr. Ding, OLED simulation team, Ningbo Research Institute, China