Doping-induced carrier profiles in organic semiconductors determined from capacitive extraction-current transients

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Nyman M, Sandberg OJ, Dahlstrom S, Spoltore D, Korner C, Zhang YD, Barlow S, Marder SR, Leo K, Vandewal K, Osterbacka R
Förläggare: NATURE PUBLISHING GROUP
Publiceringsår: 2017
Tidskrift: Scientific Reports
Tidskriftsakronym: SCI REP-UK
Volym: 7
Antal sidor: 9
ISSN: 2045-2322
eISSN: 2045-2322


Abstrakt

A method to determine the doping induced charge carrier profiles in lightly and moderately doped organic semiconductor thin films is presented. The theory of the method of Charge Extraction by a Linearly Increasing Voltage technique in the doping-induced capacitive regime (doping-CELIV) is extended to the case with non-uniform doping profiles and the analytical description is verified with drift-diffusion simulations. The method is demonstrated experimentally on evaporated organic smallmolecule thin films with a controlled doping profile, and solution-processed thin films where the nonuniform doping profile is unintentional, probably induced during the deposition process, and a priori unknown. Furthermore, the method offers a possibility of directly probing charge-density distributions at interfaces between highly doped and lightly doped or undoped layers.


Nyckelord

doping, Extraction current transients, Organic solar cells, profiles

Senast uppdaterad 2019-05-12 vid 04:37