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Journal article

Roll-coating fabrication of flexible organic solar cells: comparison of fullerene and fullerene-free systems

By Liu, Kuan1; Larsen-Olsen, Thue Trofod2,3; Lin, Yuze1; Beliatis, Michail2,3; Bundgaard, Eva2,3; Jørgensen, Mikkel2,3; Krebs, Frederik C2,3; Zhan, Xiaowei1

From

Peking University1

Department of Energy Conversion and Storage, Technical University of Denmark2

Functional organic materials, Department of Energy Conversion and Storage, Technical University of Denmark3

Flexible organic solar cells (OSCs) based on a blend of low-bandgap polymer donor PTB7-TH and nonfullerene small molecule acceptor IEIC were fabricated via a roll-coating process under ambient atmosphere. Both an indium tin oxide (ITO)-free substrate and a flexible ITO substrate were employed in these inverted OSCs.

OSCs with flexible ITO and ITO-free substrates exhibited power conversion efficiencies (PCEs) up to 2.26% and 1.79%, respectively, which were comparable to those of the reference devices based on fullerene acceptors under the same conditions. This is the first example for all roll-coating fabrication procedures for flexible OSCs based on non-fullerene acceptors with the PCE exceeding 2%.

The fullerene-free OSCs exhibited better dark storage stability than the fullerene-based control devices.

Language: English
Year: 2016
Pages: 1044-1051
ISSN: 20507496 and 20507488
Types: Journal article
DOI: 10.1039/c5ta07357j
ORCIDs: Larsen-Olsen, Thue Trofod , Beliatis, Michail , Bundgaard, Eva , Jørgensen, Mikkel and Krebs, Frederik C

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