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Singlet Exciton–Charge Carrier Interaction in Anthracene Crystals
Author(s) -
Kalinowski J.,
Godlewski J.
Publication year - 1974
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220650240
Subject(s) - anthracene , exciton , singlet state , quenching (fluorescence) , crystal (programming language) , singlet fission , materials science , charge carrier , diffusion , photochemistry , biexciton , charge (physics) , molecular physics , fluorescence , chemistry , condensed matter physics , atomic physics , optoelectronics , physics , optics , thermodynamics , programming language , quantum mechanics , computer science , excited state
Prompt fluorescence in anthracene crystals is shown to be modified by the application of an external voltage to the illuminated crystal–water contact. The singlet exciton quenching due to the interaction with the injected holes is investigated. The rate constant for the interaction K st = (3 ± 1.5) × 10 −9 cm 3 s −1 is determined. The results indicate that singlet exciton motion is a diffusion process and that the quenching is caused by hole‐modified crystal defects. The efficiency of detrapping of holes by singlet excitons is found to be about 30%.