Journal
ORGANIC ELECTRONICS
Volume 58, Issue -, Pages 133-138Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.orgel.2018.04.005
Keywords
Non-fused small molecule acceptors; n-type organic semiconductors; Polymer solar cells
Funding
- National Natural Science Foundation of China (NSFC) [51503135, 51573120, 91633301]
- Jiangsu Provincial Natural Science Foundation [BK20150332]
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In this work, a new non-fused small molecule acceptor Ph-IC based on alkoxyl benzene and IC units was synthesized for photovoltaic applications. The small molecule Ph-IC has a very simple chemical structure and is easily synthesized. Benefited from the coplanar conjugated structure, the 0 H and S H non-covalent interactions, Ph-IC exhibits a narrow optical bandgap of 1.62 eV and a medium electron mobility of 1.84 x 10(-4) cm(2)v(-1)s(-1) . When using Ph-IC as acceptor and a wide-bandgap polymer PBFTZ as donor, the devices show a maximum PCE of 5.68% with V-oc of 0.89 V, J(sc) of 12.37 mA cm(-2) and FF of 51.5% under the illumination of AM 1.5 G at 100 mW/cm(2) . This work demonstrates that the simple-structured and low cost non-fused group can also be used as building blocks in high performation n-OS acceptors.
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