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Green solvent-processed organic solar cells based on a low cost polymer donor and a small molecule acceptor

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Abstract

Low cost photovoltaic materials and green solvent processing are important issues for commercial application of organic solar cells (OSCs). Here, we fabricated high-performance OSCs based on the low-cost conjugated polymer PTQ10 as a donor and the small molecule n-type organic semiconductor HO-IDIC-2F as an acceptor, using non-halogen tetrahydrofuran (THF) as the processing solvent. The power conversion efficiency (PCE) of the as-cast OSCs reached 12.20%, which is comparable with the ones processed with chloroform (CF) (12.43%). Thermal stability of the active layer was also studied by thermal treatment at 100 °C for 8 hours. As a result, the active layer morphology remained unchanged and the PCE of the devices still reached 12.13%, indicating a good thermal-stability of the PTQ10:HO-IDIC-2F blend film. As is commonly known, for OSCs fabricated on larger scales, the layer-by-layer (LL) method generally provides more advantages than the traditional D–A blend solution-processing method. Therefore, to test the compatibility of the THF solvent in the LL method, we fabricated blade-coated LL devices with THF as a single type of solvent for both the donor and acceptor, and the PCE could reach up to 11.85%. The surprisingly high performance of the blade-coated OSC based on the green solvent indicates that PTQ10 is a promising donor to be processed in green solvent for LL technology in the future.

Graphical abstract: Green solvent-processed organic solar cells based on a low cost polymer donor and a small molecule acceptor

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Supplementary files

Article information


Submitted
13 Mar 2020
Accepted
20 Apr 2020
First published
22 Apr 2020

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Green solvent-processed organic solar cells based on a low cost polymer donor and a small molecule acceptor

H. Huang, X. Li, C. Sun, I. Angunawela, B. Qiu, J. Du, S. Qin, L. Meng, Z. Zhang, H. Ade and Y. Li, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/D0TC01313G

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