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Published on: April 18, 2019
Determination of Surface Recombination Velocities at Contacts in Organic Semiconductor Devices Using Injected Carrier
Oskar J Sandberg1, Simon Sandén1, Anton Sundqvist1
1Center for Functional Materials and Faculty of Science and Technology, Åbo Akademi University, Porthaninkatu 3, 20500 Turku, Finland.
Abstract:
A method to determine surface recombination velocities at collecting contacts in interface-limited organic semiconductor devices, based on the extraction of injected carrier reservoirs in a single-carrier sandwich-type structure, is presented. The analytical framework is derived and verified with drift-diffusion simulations. The method is demonstrated on solution-processed organic semiconductor devices with hole-blocking TiO_{2}/organic and SiO_{2}/organic interfaces, relevant for solar cell and transistor applications, respectively.
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