TY - JOUR
T1 - Experimental reorganization energies of pentacene and perfluoropentacene
T2 - Effects of perfluorination
AU - Kera, Satoshi
AU - Hosoumi, Shunsuke
AU - Sato, Kazushi
AU - Fukagawa, Hirohiko
AU - Nagamatsu, Shin Ichi
AU - Sakamoto, Youichi
AU - Suzuki, Toshiyasu
AU - Huang, Han
AU - Chen, Wei
AU - Wee, Andrew Thye Shen
AU - Coropceanu, Veaceslav
AU - Ueno, Nobuo
PY - 2013/10/31
Y1 - 2013/10/31
N2 - Electron-phonon coupling of the highest occupied molecular orbital (HOMO) state is studied by high-resolution ultraviolet photoelectron spectroscopy (UPS) for pentacene (PEN) and perfluoropentacene (PFP) monolayers on graphite. The reorganization energy and related coupling constants associated with the interaction between holes and molecular vibrations are obtained experimentally using a single mode analysis (SMA) of the observed vibronic-satellite intensities of the monolayers. The results are compared with those estimated by multimode analyses of UPS spectra and those derived by means of theoretical approaches, indicating that the purely experimental method with SMA is useful for studying the reorganization energy and the hopping mobility of organic systems. Furthermore, we found that the reorganization energy of PFP is significantly greater than that of PEN, which is ascribed to the extended HOMO distribution of PFP by perfluorination of PEN. The comparison with the results derived from gas-phase UPS measurements is also discussed.
AB - Electron-phonon coupling of the highest occupied molecular orbital (HOMO) state is studied by high-resolution ultraviolet photoelectron spectroscopy (UPS) for pentacene (PEN) and perfluoropentacene (PFP) monolayers on graphite. The reorganization energy and related coupling constants associated with the interaction between holes and molecular vibrations are obtained experimentally using a single mode analysis (SMA) of the observed vibronic-satellite intensities of the monolayers. The results are compared with those estimated by multimode analyses of UPS spectra and those derived by means of theoretical approaches, indicating that the purely experimental method with SMA is useful for studying the reorganization energy and the hopping mobility of organic systems. Furthermore, we found that the reorganization energy of PFP is significantly greater than that of PEN, which is ascribed to the extended HOMO distribution of PFP by perfluorination of PEN. The comparison with the results derived from gas-phase UPS measurements is also discussed.
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U2 - 10.1021/jp4032089
DO - 10.1021/jp4032089
M3 - Article
AN - SCOPUS:84887156909
SN - 1932-7447
VL - 117
SP - 22428
EP - 22437
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
IS - 43
ER -