The effects of nanomorphologies of acceptors on the environmental stability of donor:acceptor blends were investigated. Dispersed acceptors in mixed phase accelerate the photooxidation of donor, whereas aggregated acceptors stabilize the donor, both of phenomena coinciding for blends. Furthermore, photooxidation of donor leads to significant deterioration of hole transport, which shows strong correlation with efficiency loss in donor:acceptor organic solar cells.
- Woong Sung
- Hansol Lee
- Kilwon Cho
