Related Experiment Video
Updated: Jan 24, 2026

Triplet Fusion Upconversion Nanocapsule Synthesis
Published on: September 7, 2022
Solid-State, Near-Infrared to Visible Photon Upconversion via Triplet-Triplet Annihilation of a Binary System
Aizitiaili Abulikemu1, Yusuke Sakagami1, Claire Heck1
1IFMRI, National Institute of Advanced Industrial Science and Technology (AIST) , Ikeda , Osaka 563-8577 , Japan.
Abstract:
Herein, triplet-triplet annihilation upconversion (TTA-UC) from near-infrared (NIR, 785 nm) to visible (yellow, centered at 570 nm) regions has been demonstrated in the binary solid of condensed chromophores. Microparticles of the binary solid comprising rubrene as a matrix (emitter) and π-extended Pd-porphyrin as a dopant (sensitizer) in a mole ratio of 1000:1 were obtained by solution casting. Excitation intensity dependence and quantum yield (QY) of the upconverted emission were characterized for individual particles under a microscope and revealed a low threshold intensity (∼100 mW/cm2) as compared to the solution and moderate UC-QY (∼0.5%) in the NIR range. The factors contributing to the UC-QY were investigated by time-resolved and steady-state spectroscopies. It was found that the intersystem crossing of the sensitizer, triplet energy transfer, and TTA occurred efficiently in the binary solid, and the fluorescence QY of the emitter governed the UC-QY.
More Related Videos
11:26Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
Published on: September 12, 2014
10:42Infrared Degenerate Four-wave Mixing with Upconversion Detection for Quantitative Gas Sensing
Published on: March 22, 2019
Related Concept Videos
Recrystallization: Solid–Solution Equilibria
Binary Fission
Binary Fission
Metallic Solids
All metallic solids exhibit high thermal and electrical conductivity, metallic luster, and malleability....
General Properties of Solutions
Structures of Solids