%0 Journal Article
%A Zhong, Yufei
%A Izawa, Seiichiro
%A Hashimoto, Kazuhito
%A Tajima, Keisuke
%A Koganezawa, Tomoyuki
%A Yoshida, Hiroyuki
%D 2015
%T Crystallization-Induced
Energy Level Change of [6,6]-Phenyl‑C61-Butyric
Acid Methyl Ester (PCBM) Film: Impact of Electronic
Polarization Energy
%U https://acs.figshare.com/articles/journal_contribution/Crystallization_Induced_Energy_Level_Change_of_6_6_Phenyl_C_sub_61_sub_Butyric_Acid_Methyl_Ester_PCBM_Film_Impact_of_Electronic_Polarization_Energy/2218096
%R 10.1021/jp506296j.s001
%2 https://ndownloader.figshare.com/files/3853828
%K polarization energy
%K PCBM molecule
%K photoelectron spectroscopy
%K Electronic Polarization EnergyThe effect
%K Methyl Ester
%K photoemission spectroscopy
%K IP
%K EA
%K film thickness
%K 0.1 eV
%K energy levels
%K electron affinity
%K Precise measurements
%K annealing
%K band gap
%X The
effect of thermal annealing on the energy levels of [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) films was investigated
using ultraviolet photoelectron spectroscopy, X-ray photoelectron
spectroscopy, and low-energy inverse photoemission spectroscopy. We
observed that thermal annealing at 150 °C induces reductions
of both the ionization potential (IP) and the electron affinity (EA)
with a narrowing of the band gap by 0.1 eV. These changes are associated
with crystallization and a 2.54% reduction in the film thickness.
Precise measurements of both the IP and EA enabled an evaluation of
the effects of the electronic polarization energy in a model based
on the charge localized in a single PCBM molecule.
%I ACS Publications