Nanomorphology in A-D-A type small molecular acceptors-based bulk heterojunction polymer solar cells

• 作者: Delong Liu Gang Li Ying Zhang
• 来源期刊: 能源化学
• 年，卷（期）: 2019,（8）
• 页码范围: 104-123
• 页数: 20页
• 语种: 英文

摘要

Recent developments in acceptor-donor-acceptor (A-D-A) type non-fullerene acceptors have led to substantial improvements in bulk-heterojunction polymer solar cells efficiency.The device performance strongly depends on photoactive layer morphology,as the molecular packing,donor-acceptor interface and phase separation significantly affect the charge-transfer states and charge carrier dynamics.In this review,we start with a brief introduction of the techniques most effectively utilized to characterize multiphase morphology.Then,we summarize recent progress in A-D-A type acceptors,with the emphasis on understanding the molecular structure-morphology-performance relationships.Finally,an outlook on correlating morphological characteristics with photovoltage losses is presented for further improving device performance.