Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence

Yasuo Nakayama; Yuta Mizuno; Masataka Hikasa; Masayuki Yamamoto; Masaharu Matsunami; Shinichiro Ideta; Kiyohisa Tanaka; Hisao Ishii; Nobuo Ueno

doi:10.1021/acs.jpclett.7b00082

Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence

Yasuo Nakayama, Yuta Mizuno, Masataka Hikasa, Masayuki Yamamoto, Masaharu Matsunami, Shinichiro Ideta, Kiyohisa Tanaka, Hisao Ishii, Nobuo Ueno

Department of Pure and Applied Chemistry

Research output: Contribution to journal › Article › peer-review

38 Citations (Scopus)

Abstract

The electronic structures of the highest occupied molecular orbital (HOMO) or the HOMO-derived valence bands dominate the transport nature of positive charge carriers (holes) in organic semiconductors. In the present study, the valence-band structures of single-crystal pentacene and the temperature dependence of their energy-momentum dispersion relations are successfully demonstrated using angle-resolved ultraviolet photoelectron spectroscopy (ARUPS). For the shallowest valence band, the intermolecular transfer integral and effective mass of the holes are evaluated as 43.1 meV and 3.43 times the electron rest mass, respectively, at room temperature along the crystallographic direction for which the widest energy dispersion is expected. The temperature dependence of the ARUPS results reveals that the transfer integral values (hole effective mass) are enhanced (reduced) by ∼20% on cooling the sample to 110 K.

Original language	English
Pages (from-to)	1259-1264
Number of pages	6
Journal	Journal of Physical Chemistry Letters
Volume	8
Issue number	6
DOIs	https://doi.org/10.1021/acs.jpclett.7b00082
Publication status	Published - 16 Mar 2017

Access to Document

10.1021/acs.jpclett.7b00082

Cite this

@article{1ce197e928a54bdb9adc001fa24e5d10,

title = "Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence",

abstract = "The electronic structures of the highest occupied molecular orbital (HOMO) or the HOMO-derived valence bands dominate the transport nature of positive charge carriers (holes) in organic semiconductors. In the present study, the valence-band structures of single-crystal pentacene and the temperature dependence of their energy-momentum dispersion relations are successfully demonstrated using angle-resolved ultraviolet photoelectron spectroscopy (ARUPS). For the shallowest valence band, the intermolecular transfer integral and effective mass of the holes are evaluated as 43.1 meV and 3.43 times the electron rest mass, respectively, at room temperature along the crystallographic direction for which the widest energy dispersion is expected. The temperature dependence of the ARUPS results reveals that the transfer integral values (hole effective mass) are enhanced (reduced) by ∼20% on cooling the sample to 110 K.",

author = "Yasuo Nakayama and Yuta Mizuno and Masataka Hikasa and Masayuki Yamamoto and Masaharu Matsunami and Shinichiro Ideta and Kiyohisa Tanaka and Hisao Ishii and Nobuo Ueno",

note = "Publisher Copyright: {\textcopyright} 2017 American Chemical Society.",

year = "2017",

month = mar,

day = "16",

doi = "10.1021/acs.jpclett.7b00082",

language = "English",

volume = "8",

pages = "1259--1264",

journal = "Journal of Physical Chemistry Letters",

issn = "1948-7185",

publisher = "American Chemical Society",

number = "6",

}

TY - JOUR

T1 - Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence

AU - Nakayama, Yasuo

AU - Mizuno, Yuta

AU - Hikasa, Masataka

AU - Yamamoto, Masayuki

AU - Matsunami, Masaharu

AU - Ideta, Shinichiro

AU - Tanaka, Kiyohisa

AU - Ishii, Hisao

AU - Ueno, Nobuo

PY - 2017/3/16

Y1 - 2017/3/16

N2 - The electronic structures of the highest occupied molecular orbital (HOMO) or the HOMO-derived valence bands dominate the transport nature of positive charge carriers (holes) in organic semiconductors. In the present study, the valence-band structures of single-crystal pentacene and the temperature dependence of their energy-momentum dispersion relations are successfully demonstrated using angle-resolved ultraviolet photoelectron spectroscopy (ARUPS). For the shallowest valence band, the intermolecular transfer integral and effective mass of the holes are evaluated as 43.1 meV and 3.43 times the electron rest mass, respectively, at room temperature along the crystallographic direction for which the widest energy dispersion is expected. The temperature dependence of the ARUPS results reveals that the transfer integral values (hole effective mass) are enhanced (reduced) by ∼20% on cooling the sample to 110 K.

AB - The electronic structures of the highest occupied molecular orbital (HOMO) or the HOMO-derived valence bands dominate the transport nature of positive charge carriers (holes) in organic semiconductors. In the present study, the valence-band structures of single-crystal pentacene and the temperature dependence of their energy-momentum dispersion relations are successfully demonstrated using angle-resolved ultraviolet photoelectron spectroscopy (ARUPS). For the shallowest valence band, the intermolecular transfer integral and effective mass of the holes are evaluated as 43.1 meV and 3.43 times the electron rest mass, respectively, at room temperature along the crystallographic direction for which the widest energy dispersion is expected. The temperature dependence of the ARUPS results reveals that the transfer integral values (hole effective mass) are enhanced (reduced) by ∼20% on cooling the sample to 110 K.

UR - http://www.scopus.com/inward/record.url?scp=85015167473&partnerID=8YFLogxK

U2 - 10.1021/acs.jpclett.7b00082

DO - 10.1021/acs.jpclett.7b00082

M3 - Article

C2 - 28240895

AN - SCOPUS:85015167473

SN - 1948-7185

VL - 8

SP - 1259

EP - 1264

JO - Journal of Physical Chemistry Letters

JF - Journal of Physical Chemistry Letters

IS - 6

ER -

Single-Crystal Pentacene Valence-Band Dispersion and Its Temperature Dependence

Abstract

Access to Document

Other files and links

Fingerprint

Cite this