Enhanced Extraction Efficiency of InGaN/GaN Light-Emitting Diodes by Liquid Phase-Deposited Zinc-Oxide-Textured Window Layer


This paper proposes a method of improving the extraction efficiency of InGaN/GaN light-emitting diodes (LEDs) using textured zinc oxide (ZnO) prepared by liquid phase deposition (LPD). The treatment solution for liquid-phase-deposited ZnO (LPD-ZnO) consisted of hydrochloric acid (HCl) saturated with ZnO powder. The deposition temperature was maintained at 30 $^{circ}hbox{C}$ using a temperature-controlled water bath system. Atomic force microscope images of the LPD-ZnO indicate that the root-mean-square (RMS) roughness of the LPD-ZnO is dependent on the HCl concentration. As compared with conventional the InGaN/GaN LED, the extraction efficiency of the InGaN/GaN LED with the LPD-ZnO-textured layer increases in conjunction with RMS roughness. The maximum light output intensity enhancement of 48% for the InGaN/GaN LED with an RMS roughness of 16.26 nm occurred under a driving current of 20 mA. The calculated optical intensity of the InGaN/GaN LED with a bumplike LPD-ZnO-textured surface indicates that the optimum RMS roughness of the textured surface layer applied to InGaN/GaN LEDs is approximately 16 nm, which agrees with the experimental results. The InGaN/GaN LED with LPD-ZnO with an RMS roughness of 16.26 nm shows a wide light output divergence angle, which satisfies the requirement of the applications of a backlight source.

Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here

PROJECT TITLE :An Enhanced Visualization Method to Aid Behavioral Trajectory Pattern Recognition Infrastructure for Big Longitudinal Data - 2018ABSTRACT:Big longitudinal knowledge offer a lot of reliable data for call creating
PROJECT TITLE :Repeated MCIK-OFDM With Enhanced Transmit Diversity Under CSI Uncertainty - 2018ABSTRACT:This Project investigates the opportunity for a repetition coded multi-carrier index keying-orthogonal frequency division
PROJECT TITLE :Node-Based Distributed Channel Access With Enhanced Delay Characteristics - 2018ABSTRACT:Recent studies in wireless scheduling have shown that carrier-sense multiple access (CSMA) can be created throughput optimal
PROJECT TITLE :Enhanced Ultrasound Image Reconstruction Using A Compressive Blind Deconvolution Approach - 2017ABSTRACT:Compressive deconvolution, combining compressive sampling and image deconvolution, represents an fascinating
PROJECT TITLE :Enhanced Independent Pole Control of Hybrid MMC-HVDC System - 2017ABSTRACT:This paper presents an enhanced independent pole management theme for hybrid modular multilevel converter based on a full-bridge submodule

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry