Borane Incorporation in a Non-Fullerene Acceptor To Tune Steric and Electronic Properties and Improve Organic Solar Cell Performance
Source abstract
Abstract
Herein we study the effects of borane incorporation in a perylene diimide (PDI)-based non-fullerene acceptor (NFA). We have previously demonstrated that a PDI-bithiophene-PDI ((PDI)2Th2) compound can be synthesized via direct (hetero)arylation techniques and is easily modified to incorporate a phosphole in the bithiophene core ((PDI)2Th2PO) to tune the electronic and geometric properties. In this work, we have synthesized the borane analogue ((PDI)2Th2B) and demonstrated that the organoboron moiety heavily influences the optical, electronic, and geometric properties. To determine the effects of borane functionalization on device performance, green solvent solution-processed bulk-heterojunction solar cells were fabricated using a medium-gap donor polymer TTFQx-T1 and each PDI compound as the NFA, respectively. Devices with the new borane-containing compound provided the highest efficiency, more than twice that for the other compounds, which was attributed to a highly twisted structure allowing for a more favorable active-layer morphology to be formed.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Organic Electronics and Photovoltaics · Conducting polymers and applications · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, AB, Canada T2N 1N4
Department of Chemistry, Rutgers University−Newark, 73 Warren Street, Newark, New Jersey 07102, United States
College of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
Department of Chemistry, York University, 4700 Keele St., Toronto, ON, Canada M3J 1P3
Funding
Division of Chemistry · Canada Foundation for Innovation · Canada Research Chairs · University of Calgary · Natural Sciences and Engineering Research Council of Canada · Canada First Research Excellence Fund
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