Light effective mass in the widely-dispersed valence band of single crystalline rubrene observed by high-resolution angle-resolved ultraviolet photoelectron spectroscopy

Yasuo Nakayama, Shin Ichi Machida, Steffen Duhm, Qian Xin, Akihiro Funakoshi, Naoki Ogawa, Satoshi Kera, Nobuo Ueno, Yutaka Noguchi, Hisao Ishii

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

High-resolution angle resolved ultraviolet photoelectron spectroscopy measurements were conducted on rubrene single crystals assisted by a laser illumination resulting in successful relief of the sample charging. Significant dispersion of the valence band was clearly resolved. The band width W and the hole effective mass mh were estimated to be 0.4 eV and 0.65mo, respectively, along the most conductive direction. The present results strongly suggest that the transport nature in rubrene single crystals should be described in the band transport of a delocalized charge carrier.

Original languageEnglish
Title of host publicationOrganic Materials for Printable Thin-Film Electronic Devices
Pages31-36
Number of pages6
Publication statusPublished - 15 Oct 2010
Event2009 MRS Fall Meeting - Boston, MA, United States
Duration: 30 Nov 20094 Dec 2009

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1197
ISSN (Print)0272-9172

Conference

Conference2009 MRS Fall Meeting
Country/TerritoryUnited States
CityBoston, MA
Period30/11/094/12/09

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