Dual-Resonator Organic Microcavities for Triplet-Triplet Annihilation Upconversion
Abstract
Solid-state triplet-triplet annihilation upconversion offers a compelling route to harvest sub-bandgap photons to increase the efficiency of photovoltaics, but low sensitizer doping required to suppress non-radiative aggregation quenching severely restricts light absorption. Here, we present a dual-resonator planar silver microcavity housing a thermally co-evaporated rubrene:palladium phthalocyanine (PdPC) active layer designed to simultaneously enhance triplet-sensitizer absorption and out-couple upconverted emission. By aligning a dispersive cavity mode with the PdPC absorption peak at 32∘, we achieve a 12-fold enhancement in absorptance at 665 nm. This absorption boost, combined with directional outcoupling through a second cavity mode, outweighs cavity-induced reabsorption losses to yield a 22-fold peak and 4.5-fold integrated enhancement in detected upconversion emission. Overall, this work highlights the potential of microcavity integration to substantially enhance solid-state upconversion performance across low-intensity optoelectronic applications.
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BibTeX
@misc{gordon2026dualresonator,
title = {{Dual-Resonator Organic Microcavities for Triplet-Triplet Annihilation Upconversion}},
author = {Robert H. Gordon and Rachel C. Kilbride and Michael Hutton and Jenny Clark and Robert D. J. Oliver},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.19209},
eprint = {2610.19209},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.19209},
}
RIS
TY - UNPB
TI - Dual-Resonator Organic Microcavities for Triplet-Triplet Annihilation Upconversion
AU - Robert H. Gordon
AU - Rachel C. Kilbride
AU - Michael Hutton
AU - Jenny Clark
AU - Robert D. J. Oliver
PY - 2026
DA - 2026/10/13
PB - arXiv
DO - 10.48550/arxiv.2610.19209
UR - https://arxiv.org/abs/2610.19209
AB - Solid-state triplet-triplet annihilation upconversion offers a compelling route to harvest sub-bandgap photons to increase the efficiency of photovoltaics, but low sensitizer doping required to suppress non-radiative aggregation quenching severely restricts light absorption. Here, we present a dual-resonator planar silver microcavity housing a thermally co-evaporated rubrene:palladium phthalocyanine (PdPC) active layer designed to simultaneously enhance triplet-sensitizer absorption and out-couple upconverted emission. By aligning a dispersive cavity mode with the PdPC absorption peak at 32^∘, we achieve a 12-fold enhancement in absorptance at 665 nm. This absorption boost, combined with directional outcoupling through a second cavity mode, outweighs cavity-induced reabsorption losses to yield a 22-fold peak and 4.5-fold integrated enhancement in detected upconversion emission. Overall, this work highlights the potential of microcavity integration to substantially enhance solid-state upconversion performance across low-intensity optoelectronic applications.
ER -