Conjugated polymers containing B←N unit as electron acceptors for all-polymer solar cells

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 450-459
• 页数: 10页
• 语种: 英文
• DOI: 10.1007/s11426-016-0503-x

摘要

Polymer electron acceptors are the key materials in all-polymer solar cells (all-PSCs).In this review,we focused on introducing the principle of boron-nitrogen coordination bond (B←N),and summarizing our recent research on polymer electron acceptors containing B←N unit for efficient all-PSC devices.Two approaches have been reported to design polymer electron acceptors using B←N unit.One is to replace a C-C unit by a B←N unit in conjugated polymers to transform a polymer electron donor to a polymer electron acceptor.The other approach is to construct novel electron-deficient building block based on B←N unit for polymer electron acceptors.The polymer electron acceptors containing B←N unit showed tunable lowest unoccupied molecular orbital (LUMO) energy levels and exhibited excellent all-PSC device performance with power conversion efficiency of exceeding 6％.These results indicate that organic boron chemistry is a new toolbox to develop functional polymer materials for optoelectronic device applications.