Gong, Z. and Zhang, H.X. and Gu, Erdan and Griffin, C. and Dawson, Martin D. and Poher, V. and Kennedy, G.T. and French, P.M.W. and Neil, M.A.A. (2007) Matrix-addressable micropixellated InGaN light-emitting diodes with uniform emission and increased light output. IEEE Transactions on Electron Devices, 54 (10). pp. 2650-2658. ISSN 0018-9383Full text not available in this repository. (Request a copy from the Strathclyde author)
Micropixellated InGaN light-emitting diodes (micro- LEDs) have a wide number of potential applications in areas including microdisplays, fluorescence-based assays and microscopy, and cell micromanipulation. Here, we present fabrication and performance details of matrix-addressable micro-LED devices which show significant improvements over their earlier counterparts. Devices with 64 × 64 micropixel elements, each of them having a 16-μm-diameter emission aperture on a 50-μm pitch, have been fabricated at blue (470 nm), green (510 nm), and UV (370 nm) wavelengths, respectively. Importantly, we have adopted a scheme of running n-metal tracks adjacent to each n-GaN mesa, so that resistance variation between the devices is reduced to below 8%, in contrast to the earlier fivefold resistance variation encountered. We have also made improvements to the spreading-layer formation scheme, resulting in significant increases in output power per element, improved current handling, and reduced turn-on voltages. These devices have been combined with a computerdriven programmable driver interface operating in constantcurrent mode, and representative microdisplay outputs are presented.
|Keywords:||InGaN, micropixellated light-emitting diode, Optics. Light, Electronic, Optical and Magnetic Materials, Electrical and Electronic Engineering|
|Subjects:||Science > Physics > Optics. Light|
|Department:||Faculty of Science > Physics > Institute of Photonics|
|Depositing user:||Strathprints Administrator|
|Date Deposited:||09 Feb 2008|
|Last modified:||22 Mar 2017 09:52|