title: A multilayered approach of Si/SiO to promote carrier transport in electroluminescence of Si nanocrystals.
abstract: The electroluminescence (EL) and photoluminescence of Si nanocrystals (Si-nc) from multilayered samples of Si/SiO are investigated. Si-nc are formed within Si and SiO layers after furnace annealing. It is found that the presence of Si interlayers creates extra carrier paths for EL emission. A comparative study is further performed on a multilayered Si/SiO sample and a single-layered one with Si and SiO homogeneously mixed. Both samples have the same ratio of Si to O and the same contents of Si and O. The multilayered sample is found to have higher EL intensity, less turn-on voltage, lower resistance, and higher current efficiency than the single-layered one. The results indicate that Si interlayers in Si/SiO may act as carrier channels, which promote carrier transport and enhance the EL emission of Si-nc.
authors.affiliation: Department of Optical Science and Engineering, and Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai, 200433, China. minglu@fudan.ac.cn.
authors.forename: Ding
authors.initials: D
authors.lastname: Li
authors.forename: Yong-Bin
authors.initials: YB
authors.lastname: Chen
authors.forename: Yong
authors.initials: Y
authors.lastname: Ren
authors.forename: Jiang
authors.initials: J
authors.lastname: Zhu
authors.forename: You-Yuan
authors.initials: YY
authors.lastname: Zhao
authors.forename: Ming
authors.initials: M
authors.lastname: Lu