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Charge Carrier Generation by Singlet–Singlet Exciton Interaction in Crystalline Anthracene under Weakly Absorbed Light Illumination
Author(s) -
Schott M.,
Berrehar J.
Publication year - 1973
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.2220590116
Subject(s) - singlet state , anthracene , photoionization , singlet fission , photon , photoconductivity , charge (physics) , photochemistry , exciton , observable , molecular physics , atomic physics , materials science , chemistry , physics , optics , optoelectronics , excited state , condensed matter physics , ionization , quantum mechanics , ion
A study of double quantum photoconductivity processes due to weakly absorbed light in crystalline anthracene is used to precise the conditions where singlet‐singlet, singlet‐photon, or singlet‐triplet processes are observable. It is found that α ss = (6 ± 3) × 10 −12 cm 3 s −1 and the average singlet photoionization cross section for photons between 4200 and 5000 Å is σ sΦ ≦ 2 × 10 −19 cm 2 . α ss is weakly dependent on T above 200 °K, the corresponding activation energy being (0.03 ± 0.03) eV. Results found in the literature are discussed and in some cases conclusions are corrected.