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Published on: September 12, 2014
The first transition metal phthalocyanines: sensitizing rubrene emission based on triplet-triplet annihilation
Jianlei Han1, Fei Zhang, Jing You
1Tianjin University, School of Chemical Engineering and Technology, Tianjin 300072, China. Youj1983@tju.edu.cn.
Abstract:
Metallophthalocyanines (MPc-o-Cou, M = Fe, Co, Ni, and Cu) with fourth period metal ions have been successfully applied as a sensitizer coupled with rubrene (Rub) in photon upconversion based on triplet-triplet annihilation. An upconversion quantum yield (ϕPUC) of up to 4.82% was observed in the CoPc-o-Cou : Rub couple. The absorption and phosphorescence emission spectra showed that the Q bands and phosphorescence emission peaks were dramatically dependent on the number of d-electrons of the metal ions in MPc-o-Cou. These results suggested that the photon upconversion behavior of MPc-o-Cou : Rub systems could be managed by altering the metal ions in MPc-o-Cou.
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