title: Effect of Electron-Beam Irradiation on Organic Semiconductor and Its Application for Transistor-Based Dosimeters.
abstract: The effects of electron-beam irradiation on the organic semiconductor rubrene and its application as a dosimeter was investigated. Through the measurements of photoluminescence and the ultraviolet photoelectron spectroscopy, we found that electron-beam irradiation induces n-doping of rubrene. Additionally, we fabricated rubrene thin-film transistors with pristine and irradiated rubrene, and discovered that the decrease in transistor properties originated from the irradiation of rubrene and that the threshold voltages are shifted to the opposite directions as the irradiated layers. Finally, a highly sensitive and air-stable electron dosimeter was fabricated based on a rubrene transistor.
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Republic of Korea.
authors.forename: Jae Joon
authors.initials: JJ
authors.lastname: Kim
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Republic of Korea.
authors.forename: Jun Mok
authors.initials: JM
authors.lastname: Ha
authors.affiliation: Department of Informative Electronic Materials, LG Chemistry Research Park , Daejeon 305-738, Republic of Korea.
authors.forename: Hyeok Moo
authors.initials: HM
authors.lastname: Lee
authors.affiliation: Safety Analysis Center (SAC), Pakistan Nuclear Regulatory Authority 42-C , 24th Commercial Street, Phase-II Ext., DHA, Karachi 75500, Pakistan.
authors.forename: Hamid Saeed
authors.initials: HS
authors.lastname: Raza
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Republic of Korea.
authors.forename: Ji Won
authors.initials: JW
authors.lastname: Park
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 305-701, Republic of Korea.
authors.forename: Sung Oh
authors.initials: SO
authors.lastname: Cho
keywords: dosimeter; electron-beam irradiation; organic thin-film transistor; rubrene; semiconductor doping