High-performance all-polymer solar cells via side-chain engineering of the polymer acceptor: the importance of the polymer packing structure and the nanoscale blend morphology

Changyeon Lee; Hyunbum Kang; Wonho Lee; Taesu Kim; Ki-Hyun Kim; Han Young Woo; Cheng Wang; Bumjoon J Kim

doi:10.1002/adma.201405226

High-performance all-polymer solar cells via side-chain engineering of the polymer acceptor: the importance of the polymer packing structure and the nanoscale blend morphology

Adv Mater. 2015 Apr 17;27(15):2466-71. doi: 10.1002/adma.201405226. Epub 2015 Mar 3.

Authors

Changyeon Lee¹, Hyunbum Kang, Wonho Lee, Taesu Kim, Ki-Hyun Kim, Han Young Woo, Cheng Wang, Bumjoon J Kim

Affiliation

¹ Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 305-701, Republic of Korea.

PMID: 25735644
DOI: 10.1002/adma.201405226

Abstract

The effectiveness of side-chain engineering is demonstrated to produce highly efficient all-polymer solar cells (efficiency of 5.96%) using a series of naphthalene diimide-based polymer acceptors with controlled side chains. The dramatic changes in the polymer packing, blend morphology, and electron mobility of all-polymer solar cells elucidate clear trends in the photovoltaic performances.

Keywords: BHJ morphology; all-polymer solar cells; high efficiency; polymer crystallinity; side-chain engineering.