Over 9％ efficiency achieved for all-polymer solar cells processed by a green solvent

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（8）
• 页码范围: 1109-1110
• 页数: 2页
• 语种: 英文
• DOI: 10.1007/s11426-017-9075-9

摘要

Bulk-heterojunction polymer solar cells (PSCs) have attracted considerable attention owning to their potential for fabricating flexible,light-weight and large area solar cell panels via high-throughput roll-to-roll technologies.Compared with conventional PSCs comprising small molecule acceptors,such as fullerenes,all-polymer solar cells (all-PSCs) containing blends of p-type/n-type polymers in the photoactive layer provide advantages including easily tunable absorption band,enhanced absorption coefficient,and long-term thermal and mechanical stability.Significant strides have been made toward all-PSCs by virtue of rational molecular design of new semiconducting materials,innovative device architectures,and interfacial engineering techniques.Recently,the power conversion efficiency (PCE) of all-PSCs has been boosted to ～8％ for single junction device,providing further justification for strong consideration.However,the photoactive layers of most reported all-PSCsare prepared by using halogenated solvents such as chloroform (CF) or chlorobenzene,which are undesirable from the viewpoint of environmental and health considerations.More to this point,the low boiling point and high volatility of CF make it a difficult choice for the fabrication of large-area devices through mass-production.