title: Intrinsic Photoluminescence Emission from Subdomained Graphene Quantum Dots.
abstract: The photoluminescence (PL) origin of bright blue emission arising from intrinsic states in graphene quantum dots (GQDs) is investigated. The bright PL of intercalatively acquired GQDs is attributed to favorably formed subdomains composed of four to seven carbon hexagons. Random and harsh oxidation which hinders the energetically favorable formation of subdomains causes weak and redshifted PL.
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Hyewon
authors.initials: H
authors.lastname: Yoon
authors.affiliation: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Yun Hee
authors.initials: YH
authors.lastname: Chang
authors.affiliation: Division of Advanced Materials Engineering, Kongju National University, Chungnam, 31080, Republic of Korea.
authors.forename: Sung Ho
authors.initials: SH
authors.lastname: Song
authors.affiliation: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Eui-Sup
authors.initials: ES
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Sung Hwan
authors.initials: SH
authors.lastname: Jin
authors.affiliation: Department of Physics, Chungbuk National University, Cheongju, 28644, Republic of Korea.
authors.forename: Chanae
authors.initials: C
authors.lastname: Park
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Jinsup
authors.initials: J
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Bo Hyun
authors.initials: BH
authors.lastname: Kim
authors.affiliation: Department of Physics, Chungbuk National University, Cheongju, 28644, Republic of Korea.
authors.forename: Hee Jae
authors.initials: HJ
authors.lastname: Kang
authors.affiliation: Graduate School of Nanoscience and Technology, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Yong-Hyun
authors.initials: YH
authors.lastname: Kim
authors.affiliation: Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Republic of Korea.
authors.forename: Seokwoo
authors.initials: S
authors.lastname: Jeon
keywords: band gap; graphene quantum dots; intrinsic photoluminescence; luminescence mechanism; subdomains