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Controlling the Spin Exchange Energy through Charge Transfer for Triplet State Management in Organic Semiconductors
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.ORCID iD: 0000-0001-7572-7333
Cavendish Laboratory, University of Cambridge, JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.ORCID iD: 0000-0001-6565-6308
Laboratory for Chemistry of Novel Materials, Université de Mons, Place du Parc 20, 7000 Mons, Belgium.ORCID iD: 0000-0002-2989-3557
2022 (English)In: Chemistry of Materials, ISSN 0897-4756, E-ISSN 1520-5002, Vol. 34, no 16, p. 7095-7105Article in journal (Refereed) Published
Abstract [en]

Optoelectronic devices fabricated from organic semiconductors, such as organic light emitting diodes (OLEDs) and photovoltaics (OPVs), have reached the point of viability in real-world applications. However, despite the rapid recent progress in the field, open questions remain around the role and management of spin-triplet states in these systems. In this perspective, we discuss recent advances in the manipulation of triplet states, with a particular focus on strategies that involve modulating the spin exchange energy through tuning the degree of charge transfer character in the excited state. We explore the equivalence between the localized and delocalized electronic excited state manifolds in OLEDs and OPVs and propose strategies for aligning the designs of OPVs with those of OLEDs. We consider that lessons from the successful triplet management strategies in the OLED field hold the key for improving the radiative efficiency of OPVs, which is necessary to drive power conversion efficiencies toward the important milestone of 20% and beyond.

Place, publisher, year, edition, pages
American Chemical Society (ACS) , 2022. Vol. 34, no 16, p. 7095-7105
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:liu:diva-210903DOI: 10.1021/acs.chemmater.2c01301ISI: 000836201400001Scopus ID: 2-s2.0-85136198136OAI: oai:DiVA.org:liu-210903DiVA, id: diva2:1927034
Funder
EU, Horizon 2020, 101020167Available from: 2025-01-14 Created: 2025-01-14 Last updated: 2025-03-07Bibliographically approved

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Gillett, Alexander J.Friend, Richard H.Beljonne, David
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