TY - JOUR
T1 - Effect of thermal annealing on exciton diffusion in a diketopyrrolopyrrole derivative
AU - Mikhnenko, Oleksandr V.
AU - Lin, Jason
AU - Shu, Ying
AU - Anthony, John E.
AU - Blom, Paul W.M.
AU - Nguyen, Thuc Quyen
AU - Loi, Maria Antonietta
PY - 2012/11/7
Y1 - 2012/11/7
N2 - We show that the method we have developed for measuring the singlet exciton diffusion length in blends with [6,6]-phenyl-C 61-butyric acid methyl ester (PCBM) can be applied not only to polymeric materials, but also to small molecule organic semiconductors. Small organic molecules have a large potential for molecular re-organization upon thermal annealing. Here we show that the exciton diffusion length is decreased upon annealing from 9 to 3 nm in a thin film of a diketopyrrolopyrrole derivative. Such a variation is attributed to exciton delocalization effects in the crystalline domains that are formed during the annealing process as well as to the exciton quenching at grain boundaries.
AB - We show that the method we have developed for measuring the singlet exciton diffusion length in blends with [6,6]-phenyl-C 61-butyric acid methyl ester (PCBM) can be applied not only to polymeric materials, but also to small molecule organic semiconductors. Small organic molecules have a large potential for molecular re-organization upon thermal annealing. Here we show that the exciton diffusion length is decreased upon annealing from 9 to 3 nm in a thin film of a diketopyrrolopyrrole derivative. Such a variation is attributed to exciton delocalization effects in the crystalline domains that are formed during the annealing process as well as to the exciton quenching at grain boundaries.
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U2 - 10.1039/c2cp41359k
DO - 10.1039/c2cp41359k
M3 - Article
C2 - 22767085
AN - SCOPUS:84867533193
SN - 1463-9076
VL - 14
SP - 14196
EP - 14201
JO - Physical Chemistry Chemical Physics
JF - Physical Chemistry Chemical Physics
IS - 41
ER -