LEDs based on p‐type ZnO nanowires synthesized by electrochemical deposition method

Abstract

The data concerning the light‐emitting diodes based on ZnO homojunction with ITO/n ‐ZnO/p ‐ZnO+photoresist/Au/Ti and ITO/n ‐ZnO/p ‐ZnO+pho‐toresist+PEDOT:PSS/Au/Ti structures are reported. The p ‐ZnO nanowires were grown by electrochemical deposition method. It is suggested that the p ‐type conductivity first of all is connected with the zinc vacancies VZn. The clear rectifying behavior was observed on the current‐voltage curve of the ZnO p ‐n homojunction. The broad electroluminescence (EL) emission bands in the blue, green and red regions lead to observation of the white light by a naked eye under forward bias. The intrinsic defects such as Zni, VZn, Vo and Oi would be responsible for occurrence of these bands. (© 2014 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Effect of ZnO Layers on Transport and Relaxation of Charge in Porous Silicon–Silicon Structures

“…In order to obtain ZnO layers on the PS surface, electrochemical deposition method was used. The method has proven itself effective in the growth of ZnO nanostructures on Si and other electrically conductive substrates [5,8]. Two-electrode electrochemical cell with water solution of 0.05 M Zn(NO 3 ) 2 •6H 2 O and 0.1 M NaNO 3 was used in the deposition process.…”

“…ZnO with its wide direct bandgap of 3.37 eV and large exciton binding energy of 60 meV is a prospective material for use in various electronic and optoelectronic applications [1][2][3]. As far as optoelectronics is considered, ZnO main benefits are green and blue luminescence, transparency of nanostructured ZnO layers in the visible, efficient photoelectric conversion in the UV, antireflective properties and compatibility with traditional electrode materials [4][5][6][7][8]. ZnO also shows interesting catalytic [9], sensor [10,11] and piezoelectric properties [3,12].…”

“…Diverse morphologies of ZnO nanostructures such as nanorods, nanowires, nanosheets, nanocombs and nanoribbons have been synthesized by different physical and chemical fabrication techniques. These fabrication methods include chemical vapor deposition [14], thermal evaporation [15,16], magnetron sputtering [17], hydrothermal [18], pulsed laser deposition [19,20], sol-gel [21,22], chemical bats deposition [23], flame transport synthesis [24] and electrochemical deposition [5,8,25]. Many reports have thoroughly discussed the growth mechanism and explained the differences in the structures obtained via different technological routes.…”

Optical Properties of Composite Structure Based on ZnO Microneedles and Alq3 Thin Film

“…This material is also light emitting [7]. There are many companies in the world involved into production of transparent and electrically conductive ZnO-based oxides for the needs of electronics [8].…”

Photoluminescence Study of ZnO Nanostructures Grown by Hydrothermal Method

“…The most challenging problem of ZnO based electrooptic devices is the lack of stable and reliable p-type doping; mainly due to the selfcompensation property of ZnO [1]. For this reason ZnObased LEDs were fabricated by combining n-type ZnO with a p-type semiconductor other than ZnO, for example, Cu2O, ZnTe, SrCu2O2, AlGaN, GaN or p-type conduction polymers [2].…”