Photophysical properties of palladium/platinum tetrasulfonyl phthalocyanines and their application in triplet-triplet annihilation upconversion

Photophysical properties of palladium/platinum tetrasulfonyl phthalocyanines and their application in triplet-triplet annihilation upconversion

Triplet photosensitizers showing strong absorption in the red/deep red spectral region, high intersystem crossing, a long-lived triplet state and a high triplet state energy level are crucial for triplet-triplet annihilation upconversion. Herein we selected two tetrasulfonyl-substituted phthalocyani...

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Veröffentlicht in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2018, Vol.6 (21), p.5785-5793
Hauptverfasser: Che, Yuanyuan, Yang, Wenbo, Tang, Geliang, Dumoulin, Fabienne, Zhao, Jianzhang, Liu, Lang, ci, Ümit
Format: Artikel
Sprache:eng
Schlagworte:
Emission
Energy levels
Fluorescence
Palladium
Personal computers
Phosphorescence
Platinum
Upconversion
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Zusammenfassung:Triplet photosensitizers showing strong absorption in the red/deep red spectral region, high intersystem crossing, a long-lived triplet state and a high triplet state energy level are crucial for triplet-triplet annihilation upconversion. Herein we selected two tetrasulfonyl-substituted phthalocyanine (Pc) Pt( ii ) and Pd( ii ) complexes ( Pd-Pc and Pt-Pc ) likely to meet the above criteria. The complexes showed prolonged triplet state lifetimes (15.9 μs and 3.03 μs) and high triplet state energy levels (1.5 eV) as compared to a Pc complex bearing electron donating groups (triplet lifetimes
ISSN:2050-7526
2050-7534
DOI:10.1039/c8tc00513c