High-Performance All-Polymer Solar Cells Based on Face-On Stacked Polymer Blends with Low Interfacial Tension

Hyunbum Kang; Ki-Hyun Kim; Joonhyeong Choi; Changyeon Lee; Bumjoon J Kim

doi:10.1021/mz500415a

High-Performance All-Polymer Solar Cells Based on Face-On Stacked Polymer Blends with Low Interfacial Tension

ACS Macro Lett. 2014 Oct 21;3(10):1009-1014. doi: 10.1021/mz500415a. Epub 2014 Sep 16.

Authors

Hyunbum Kang¹, Ki-Hyun Kim¹, Joonhyeong Choi¹, Changyeon Lee¹, Bumjoon J Kim¹

Affiliation

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

PMID: 35610784
DOI: 10.1021/mz500415a

Abstract

We report highly efficient all-polymer solar cells with power conversion efficiencies of over 4.5% by highly intermixed blends of PTB7-Th donor and P(NDI2OD-T2) acceptor polymers. The low interfacial tension and the face-on π-π stackings of the all-polymer blends afforded desired nanophase morphology, which facilitates efficient charge transport from the active layer to each electrode. In addition, the incorporation of 1,8-diiodooctane additives was able to tune the degree of crystallinity and orientation of P(NDI2OD-T2) acceptors, resulting in remarkable enhancement of electron mobility, external quantum efficiency, and J_SC values.