Abstract
The photocurrent stimulated by excitons in tetracene layers was investigated. Mechanism of the stimulation follows from triplet exciton—trapped charge carrier interaction. The measurements were made on tetracene films evaporated onto glass substrate in vacuum. The samples were equipped with gold electrodes, deposited in planar configuration, directly on the glass substrate (bottom contacts) or on the top (non-substrate side) of the organic layer (top contact). Both types of samples were illuminated by monochromatic light directed perpendicularly to the surface, either from substrate or non-substrate side of examined layers. It was shown that the current-wavelength characteristics obtained under illumination onto the non-substrate side are reversely proportional to the absorption coefficient, while in case of illumination onto the substrate side of the sample the dependence on the absorption coefficient is proportional. The phenomena follows from different efficiency of charge carrier detrapping by excitons from substrate and non-substrate side.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.