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Charge Carrier Injection by Excitons at a Tetracene (Anthracene) – Electrolyte Interface
Author(s) -
Vaubel G.
Publication year - 1970
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.19700380120
Subject(s) - tetracene , anthracene , exciton , electrolyte , singlet fission , charge carrier , chemistry , photochemistry , ion , electron , singlet state , oxygen , singlet oxygen , chemical physics , electrode , materials science , atomic physics , excited state , condensed matter physics , optoelectronics , physics , organic chemistry , quantum mechanics
The influence of oxygen in electrolytic contacts on extrinsic photocurrents in tetracene and anthracene crystals is investigated. By adding Na 2 SO 3 to the electrolytic electrode it is possible to vary the O 2 partial pressure by orders of magnitude. It is found that triplet induced hole currents are controlled by a reaction of triplet excitons with oxygen, while singlet exciton induced hole currents must be produced by a specific exciton‐water reaction. On the other hand it is found that Na 2 SO 3 stimulates an electron injection i.e. sulfit ions can act as electron donor upon interaction with triplet excitons. A kinetic analysis of the results is presented.