title: A high-performance white-light-emitting-diodes based on nano-single crystal divanadates quantum dots.
abstract: We report a high-performance phosphors-free white light-emitting-diodes (w-LEDs) using Ba2V2O7 or Sr2V2O7 quantum dots that directly heteroepitaxially grown on common quartz substrates by polymer assisted deposition (PAD). The quantum efficiency of quantum dots is as high as 95%. More importantly, electronic local functions, band structure and partial density of states have been firstly calculated to study the luminescent and heteroepitaxial growth mechanisms by the Ab-initio Simulation. Additionally, the glaring white light excited at a wavelength of 325 nm was experimentally observed, which unambiguously demonstrated that such quantum dots can be efficient w-LEDs for solid state lighting.
authors.affiliation: 1] State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China [2] Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
authors.forename: Weiqing
authors.initials: W
authors.lastname: Yang
authors.affiliation: College of Physics and Electronic Information, Luoyang Normal University, Luoyang 471022, China.
authors.forename: Zhongli
authors.initials: Z
authors.lastname: Liu
authors.affiliation: School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.
authors.forename: Jun
authors.initials: J
authors.lastname: Chen
authors.affiliation: National Synchrotron Radiation Laboratory and Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui 230029, China.
authors.forename: Li
authors.initials: L
authors.lastname: Huang
authors.affiliation: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Advanced Technologies of Materials (Ministry of Education), School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Pan
authors.affiliation: State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.
authors.forename: Bo
authors.initials: B
authors.lastname: Wu
authors.affiliation: State Key Laboratory of Electronic Thin films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054, China.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Lin