title: Temperature-dependent resonance energy transfer from semiconductor quantum wells to graphene.
abstract: Resonance energy transfer (RET) has been employed for interpreting the energy interaction of graphene combined with semiconductor materials such as nanoparticles and quantum-well (QW) heterostructures. Especially, for the application of graphene as a transparent electrode for semiconductor light emitting diodes, the mechanism of exciton recombination processes such as RET in graphene-semiconductor QW heterojunctions should be understood clearly. Here, we characterized the temperature-dependent RET behaviors in graphene/semiconductor QW heterostructures. We then observed the tuning of the RET efficiency from 5% to 30% in graphene/QW heterostructures with ∼60 nm dipole-dipole coupled distance at temperatures of 300 to 10 K. This survey allows us to identify the roles of localized and free excitons in the RET process from the QWs to graphene as a function of temperature.
authors.affiliation: Creative Research Center for Graphene Electronics, Electronics and Telecommunications Research Institute (ETRI) , 218 Gajeong-ro, Yuseong-gu, Daejeon 305-700, Korea.
authors.forename: Young-Jun
authors.initials: YJ
authors.lastname: Yu
authors.forename: Keun Soo
authors.initials: KS
authors.lastname: Kim
authors.forename: Jungtae
authors.initials: J
authors.lastname: Nam
authors.forename: Se Ra
authors.initials: SR
authors.lastname: Kwon
authors.forename: Hyeryoung
authors.initials: H
authors.lastname: Byun
authors.forename: Kwanjae
authors.initials: K
authors.lastname: Lee
authors.forename: Jae-Hyun
authors.initials: JH
authors.lastname: Ryou
authors.forename: Russell D
authors.initials: RD
authors.lastname: Dupuis
authors.forename: Jeomoh
authors.initials: J
authors.lastname: Kim
authors.forename: Gwanghyun
authors.initials: G
authors.lastname: Ahn
authors.forename: Sunmin
authors.initials: S
authors.lastname: Ryu
authors.forename: Mee-Yi
authors.initials: MY
authors.lastname: Ryu
authors.forename: Jin Soo
authors.initials: JS
authors.lastname: Kim
keywords: Resonance energy transfer; free exciton; graphene; localized exciton; semiconductor quantum well; temperature dependence