Issue 25, 2015

Enhanced crystalline morphology of a ladder-type polymer bulk-heterojunction device by blade-coating

Abstract

A blade-coating process was employed to fabricate bulk-heterojunction (BHJ) polymer solar cells based on a ladder-type polymer (PIDT-PhanQ) with low crystallinity. Compared to the devices processed by a conventional spin-coating method, an intriguing morphology with enhanced phase-separation and increased crystallinity was achieved. As a result, power conversion efficiency up to 7.25% could be achieved from the blade-coated PIDT-PhanQ:PC71BM BHJ film, surpassing the original value obtained by spin-coating (6.29%). This improved photovoltaic performance is attributed to the improved charge carrier mobilities, which correlates well with the increased crystallinity and the organized network of the donor–acceptor phases that produce efficient charge-transporting pathways.

Graphical abstract: Enhanced crystalline morphology of a ladder-type polymer bulk-heterojunction device by blade-coating

Supplementary files

Article information

Article type
Communication
Submitted
24 Apr 2015
Accepted
25 May 2015
First published
26 May 2015

Nanoscale, 2015,7, 10936-10939

Author version available

Enhanced crystalline morphology of a ladder-type polymer bulk-heterojunction device by blade-coating

J. H. Kim, J. W. Jung, S. T. Williams, F. Liu, T. P. Russell and A. K.-Y. Jen, Nanoscale, 2015, 7, 10936 DOI: 10.1039/C5NR02657A

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