Abstract : We reveal the role of localized space charges in hole-only devices based on an organic semiconductor with embedded metal nanoparticles (MNPs). MNPs act as deep traps for holes and reduce the current density compared to a device without MNPs by a factor of 104 due to the build-up of localized space charge. Dynamic MNPs charged neutrality can be realized during operation by electron transfer from excitons created in the organic matrix, enabling light sensing independent of device bias. In contrast to the previous speculations, electrical bistability in such devices was not observed.
Type de document :
Article dans une revue
Applied Physics Letters, American Institute of Physics, 2016, 108
https://hal-ujm.archives-ouvertes.fr/ujm-01309250
Contributeur : Nicolas Crespo-Monteiro
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Soumis le : vendredi 29 avril 2016 - 10:51:24
Dernière modification le : jeudi 15 mars 2018 - 01:36:35
Giovanni Ligorio, M.V. Nardi, R. Steyrleuthner, Dris Ihiawakrim, N. Crespo-Monteiro, et al.. Metal nanoparticle mediated space charge and its optical control in an organic hole-only device. Applied Physics Letters, American Institute of Physics, 2016, 108. 〈ujm-01309250〉
