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Diffusion of triplet excitons in amorphous tetracene
Author(s) -
Hofberger W.,
Bässler H.
Publication year - 1975
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.2220690248
Subject(s) - tetracene , exciton , diffusion , photoconductivity , amorphous solid , materials science , biexciton , excitation , condensed matter physics , molecular physics , chemistry , physics , optoelectronics , photochemistry , anthracene , crystallography , thermodynamics , quantum mechanics
Analysis of the excitation spectrum of extrinsic photoconduction in evaporated amorphous tetracene films in terms of exciton diffusion theory yields a diffusion length l d = (1000 ± 250) Å for triplet excitons. From pulsed photoconductivity measurements the lifetime of free excitons is found to be (0.6 ± 0.1) μs. The triplet exciton diffusion coefficient is D = (1.6 ± 0.8) × 10 −4 cm 2 s −1 .