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Updated: Jan 27, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Red-to-blue photon up-conversion with high efficiency based on a TADF fluorescein derivative
Wenlong Chen1, Fengling Song, Shanliang Tang
1State Key Laboratory of Fine Chemicals, Dalian University of Technology, No. 2 Linggong Road, High-tech District, Dalian, 116024, China. songfl@dlut.edu.cn.
Abstract:
A new photon up-conversion system with a TADF fluorescein derivative as a photosensitizer was developed to achieve a quite large anti-Stokes shift from red to blue with a fairly high up-conversion emission quantum yield. This TADF photosensitizer has a very small ΔEST to provide a 207 nm anti-Stokes shift photon up-conversion. Meanwhile, it has a quite long triplet state lifetime (22.11 μs) and a large molar extinction coefficient to assure a high up-conversion efficiency of 11.2%. These results fully demonstrated the potential of the TADF fluorescein derivative as the photosensitizer used in photon up-conversion for the first time.
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