Issue 46, 2022

Recharging upconversion: revealing rubrene's replacement

Abstract

One of the major limitations of solid-state perovskite-sensitized photon upconversion to date is that the only annihilator successfully paired with the perovskite sensitizer has been rubrene, raising the question of whether this appraoch of triplet sensitization is universal or limited in scope. Additionally, the inherent energetic mismatch between the perovskite bandgap and the rubrene triplet energy has restricted the apparent anti-Stokes shift achievable in the upconversion process. To increase the apparent anti-Stokes shift for upconversion processes, anthracene derivates are of particular interest due to their higher triplet energies. Here, we demonstrate successful sensitization of the triplet state of 1-chloro-9,10-bis(phenylethynyl)anthracene using the established formamidinium methylammonium lead triiodide perovskite FA0.85MA0.15PbI3, resulting in upconverted emission at 550 nm under 780 nm excitation. We draw a direct comparison to rubrene to unravel the underlying differences in the upconversion processes.

Graphical abstract: Recharging upconversion: revealing rubrene's replacement

Article information

Article type
Paper
Submitted
26 Sept. 2022
Accepted
08 Nov. 2022
First published
10 Nov. 2022

Nanoscale, 2022,14, 17254-17261

Author version available

Recharging upconversion: revealing rubrene's replacement

C. M. Sullivan and L. Nienhaus, Nanoscale, 2022, 14, 17254 DOI: 10.1039/D2NR05309H

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