Metallophthalocyanines as triplet sensitizers for highly efficient photon upconversion based on sensitized triplet-triplet annihilation.

Autor: Han JL; Tianjin University, School of Chemical Engineering and Technology, Tianjin 300072, China. Youj1983@tju.edu.cn., You J, Yonemura H, Yamada S, Wang SR, Li XG
Jazyk: angličtina
Zdroj: Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology [Photochem Photobiol Sci] 2016 Aug 04; Vol. 15 (8), pp. 1039-45. Date of Electronic Publication: 2016 Jul 19.
DOI: 10.1039/c6pp00172f
Abstrakt: Soluble palladium and platinum phthalocyanines with coumarin moieties were synthesized with Q bands in the red and near-IR regions, in which the molar extinction coefficients were up to 1.01 × 10(5) cm(-1) mol(-1). These metallophthalocyanines were coupled with rubrene and applied in photon upconversion systems based on triplet-triplet annihilation. The highest upconversion efficiency of the palladium phthalocyanine was 5.6%, which is higher than that of the platinum phthalocyanine-rubrene system. The larger molar extinction coefficient resulted in high upconversion capability (>10(5) cm(-1) mol(-1)) and low saturation incident power (<20 mW cm(-2)).
Databáze: MEDLINE