Issue 3, 2023

Generating spin-triplet states at the bulk perovskite/organic interface for photon upconversion

Abstract

Perovskite-sensitized triplet–triplet annihilation (TTA) upconversion (UC) holds potential for practical applications of solid-state UC ranging from photovoltaics to sensing and imaging technologies. As the triplet sensitizer, the underlying perovskite properties heavily influence the generation of spin-triplet states once interfaced with the organic annihilator molecule, typically polyacene derivatives. Presently, most reported perovskite TTA-UC systems have utilized rubrene doped with ∼1% dibenzotetraphenylperiflanthene (RubDBP) as the annihilator/emitter species. However, practical applications require a larger apparent anti-Stokes than is currently achievable with this system due to the inherent 0.4 eV energy loss during triplet generation. In this minireview, we present the current understanding of the triplet sensitization process at the perovskite/organic semiconductor interface and introduce additional promising annihilators based on anthracene derivatives into the discussion of future directions in perovskite-sensitized TTA-UC.

Graphical abstract: Generating spin-triplet states at the bulk perovskite/organic interface for photon upconversion

Article information

Article type
Minireview
Submitted
17 Okt. 2022
Accepted
12 Dec. 2022
First published
20 Dec. 2022

Nanoscale, 2023,15, 998-1013

Generating spin-triplet states at the bulk perovskite/organic interface for photon upconversion

C. M. Sullivan and L. Nienhaus, Nanoscale, 2023, 15, 998 DOI: 10.1039/D2NR05767K

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