title: Electroluminescence from nanoscale materials via field-driven ionization.
abstract: The high degree of morphological and energetic disorder inherent to many nanosized materials places limitations on charge injection into and transport rates through thin films of these materials. We demonstrate electroluminescence achieved by local generation of charge that eliminates the need for injection of charge carriers from the device electrodes. We show electroluminescence from thin films of nanoscale materials that do not support direct current excitation and suggest a mechanism for the charge generation and electroluminescence that is consistent with our time-averaged and time-resolved observations.
authors.affiliation: Department of Information Technology and Electrical Engineering ETH Zurich, 35 Gloriastrasse, 8092 Zurich Switzerland.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Wood
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Panzer
authors.forename: Deniz
authors.initials: D
authors.lastname: Bozyigit
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Shirasaki
authors.forename: Ian
authors.initials: I
authors.lastname: Rousseau
authors.forename: Scott
authors.initials: S
authors.lastname: Geyer
authors.forename: Moungi G
authors.initials: MG
authors.lastname: Bawendi
authors.forename: Vladimir
authors.initials: V
authors.lastname: Bulović
mesh_terms: D004563:Electrochemistry; D049449:Luminescence; D008567:Membranes, Artificial; D049329:Nanostructures / Q000737:chemistry*; D036103:Nanotechnology; D010316:Particle Size; D013499:Surface Properties
chemical_list: D008567:Membranes, Artificial