NIMTE OpenIR  > 2018专题
Comparative study on luminescence extraction strategies of LED by large-scale fabrication of nanopillar and nanohole structures
Guo, Wei; Li, Junmei; Sheikh, Moheb; Jiang, Jie'an; Yang, Zhenhai; Li, Hongwei; Guo, Shiping; Sheng, Jiang; Sun, Jie; Bo, Baoxue; Ye, Jichun
2018
Source PublicationJOURNAL OF PHYSICS D-APPLIED PHYSICS
Volume51Issue:24
AbstractLight extraction and current injection are two important considerations in the development of high efficiency light-emitting-diodes (LEDs), but usually cannot be satisfied simultaneously in nanostructure patterned devices. In this work, we investigated near-LW LEDs with nanopillar and nanohole patterns to improve light extraction efficiency. Photoluminescence (PL) intensities were enhanced by 8.0 and 4.1 times for nanopillar and nanohole LEDs compared to that of planar LED. Nanopillar LED exhibits higher PL emission than that of the nanohole LED, attributing to a convex shape sidewall for more effective outward light scattering, and reduction of quantum-confined-stark-effect owing to strain relaxation. However, nanopillar LED exhibits lower electroluminescence intensity than the nanohole sample, which calls for further optimization in carrier distributions. Experimental results were further supported by near-field electric field simulations. This work demonstrates the difference in optical and electrical behaviors between the nanopillar and nanohole LEDs, paving the way for detailed understanding on luminescence extraction mechanisms of nanostructure patterned UV emitters.
KeywordLight-emitting-diodes Photonic Crystal-structure Multiple-quantum Wells Optical-properties Output Power Efficiency Arrays Improvement Wavelength Bandgap
Subject AreaMaterials Science ; Physics
Language英语
Document Type期刊论文
Identifierhttp://ir.nimte.ac.cn/handle/174433/17387
Collection2018专题
Recommended Citation
GB/T 7714
Guo, Wei,Li, Junmei,Sheikh, Moheb,et al. Comparative study on luminescence extraction strategies of LED by large-scale fabrication of nanopillar and nanohole structures[J]. JOURNAL OF PHYSICS D-APPLIED PHYSICS,2018,51(24).
APA Guo, Wei.,Li, Junmei.,Sheikh, Moheb.,Jiang, Jie'an.,Yang, Zhenhai.,...&Ye, Jichun.(2018).Comparative study on luminescence extraction strategies of LED by large-scale fabrication of nanopillar and nanohole structures.JOURNAL OF PHYSICS D-APPLIED PHYSICS,51(24).
MLA Guo, Wei,et al."Comparative study on luminescence extraction strategies of LED by large-scale fabrication of nanopillar and nanohole structures".JOURNAL OF PHYSICS D-APPLIED PHYSICS 51.24(2018).
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