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Temperature Dependence of Exciton Diffusion in a Small‐Molecule Organic Semiconductor Processed With and Without Additive
Author(s) -
Lin Jason D. A.,
Mikhnenko Oleksandr V.,
van der Poll Thomas S.,
Bazan Guillermo C.,
Nguyen ThucQuyen
Publication year - 2015
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201404590
Subject(s) - exciton , diffusion , materials science , organic semiconductor , semiconductor , yield (engineering) , small molecule , statistical physics , chemical physics , condensed matter physics , optoelectronics , thermodynamics , physics , chemistry , biochemistry , metallurgy
The temperature dependence of exciton diffusion in a small‐molecule organic semiconductor processed with and without additive is investigated. As‐cast and 1,8‐diiodooctane‐processed films yield exciton diffusion lengths of 6.8 and 4.9 nm, respectively. Using a Monte Carlo simulation, it is shown that processing with 1,8‐diiodooctane increases the excitonic trap density, which directly reduces the exciton diffusion length.