title: Inorganic Nano Light-Emitting Transistor: p-Type Porous Silicon Nanowire/n-Type ZnO Nanofilm.
abstract: An inorganic nano light-emitting transistor (INLET) consisting of p-type porous Si nanowires (PoSiNWs) and an n-type ZnO nanofilm was integrated on a heavily doped p-type Si substrate with a thermally grown SiO2 layer. To verify that modulation of the Fermi level of the PoSiNWs is key for switchable light emitting, I-V and electroluminescent characteristics of the INLET are investigated as a function of gate bias (V g ). As the V g is changed from 0 V to -20 V, the current level and light-emission intensity in the orange-red range increase by three and two times, respectively, with a forward bias of 20 V in the p-n junction, compared to those at a V g of 0 V. On the other hand, as the V g approaches 10 V, the current level decreases and the emission intensity is reduced and then finally switched off. This result arises from the modulation of the Fermi level of the PoSiNWs and the built-in potential at the p-n junction by the applied gate electric field.
authors.affiliation: Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Republic of Korea.
authors.forename: Sang Hoon
authors.initials: SH
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Republic of Korea.
authors.forename: Jong Woo
authors.initials: JW
authors.lastname: Kim
authors.affiliation: Department of BioNano Technology, Gachon University, Seongnam, 461-701, Republic of Korea.
authors.forename: Tae Il
authors.initials: TI
authors.lastname: Lee
authors.affiliation: Department of Materials Science and Engineering, Yonsei University, Seoul, 120-749, Republic of Korea.
authors.forename: Jae Min
authors.initials: JM
authors.lastname: Myoung
keywords: inorganic materials; light-emitting devices; nanostructures; porous Si; self-switching transistors; transistors