Photogeneration and charge transport mechanisms in thin films of organic electron acceptor 2,4,7-trinitro-9-fluorenone

The photogeneration process in thin films of vacuum-evaporated amorphous 2,4,7-trinitro-9-fluorenone (a-TNF) is investigated by steady-state photoconductivity measurements and by the photoinduced discharge method. It was found that in the intrinsic spectral range of absorption (λ≤400 nm) the charge carrier photogeneration mechanism includes several steps. The final step, thermal dissociation of light generated electron-hole pairs, is realized according to the Onsager mechanism. The effect of trapping centers on the conductivity of thin films of a-TNF is investigated by space charge limited current (SCLC), steady-state photoconductivity, and transient photoconductivity methods. It is suggested that the transport of charge carriers in a-TNF is controlled by traps. © 2008 IOP Publishing Ltd.

Авторы
Номер выпуска
47
Язык
Английский
Статус
Опубликовано
Номер
475205
Том
20
Год
2008
Организации
  • 1 Peoples' Friendship University of Russia, Moscow, Russian Federation
Ключевые слова
Amorphous films; Charge trapping; Civil aviation; Dissociation; Electric conductivity; Ketones; Photoconductivity; Photoelectricity; Photorefractive materials; Thin films; Charge transport mechanisms; Electron acceptors; Fluorenone; Hole pairs; Onsager; Photogeneration; Photoinduced discharges; Space charge limited currents; Spectral ranges; Transient photoconductivities; Transport of charges; Trapping centers; Charge carriers
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/3042/