What question did this study set out to answer?

To explore a novel strategy for efficiently harnessing near-infrared photons for solid-state photon up-conversion.

April 24, 2026Advanced Materials Interfaces0 citationsOpen Access

Charge Transfer States in Donor–Acceptor Bulk‐Heterojunctions as Triplet–Triplet Annihilation Sensitizer for Solid‐State Photon Upconversion (Adv. Mater. Interfaces 8/2026)

MKMaciej Klein AIAlexander R. IrelandThe University of Queensland EMEvan G. MooreThe University of Queensland

Key Points

To explore a novel strategy for efficiently harnessing near-infrared photons for solid-state photon up-conversion.
Utilized NIR-absorbing molecular heterojunctions to enable charge-transfer state formation.
Assessed photon up-conversion efficiencies under low-intensity illumination.
Achieved high photon up-conversion quantum efficiencies.
Demonstrated significant triplet population density amplification through the excitonic cascade.

Abstract

Photon Up-Conversion In the Research Article (DOI: 10.1002/admi.202500897), Maciej Klein, Evan G. Moore, Ajay K. Pandey, and co-workers describe a novel strategy for harnessing near-infrared photons to advance solid-state photon interconversion in molecular heterojunctions. The NIR-absorbing molecular stack enables efficient triplet generation via charge-transfer state formation, amplifying triplet population density and yielding high photon up-conversion quantum efficiencies under incoherent, low-intensity illumination. The underlying excitonic cascade makes it highly attractive for quantum sensing and photodetector technologies.

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