Investigation of forward voltage uniformity in monolithic light-emitting diode arrays

Liu, Zhao Jun, Chong, Wing Cheung, Wong, Ka Ming ORCID: https://orcid.org/0000-0003-3770-1380, Keung, Chi Wing and Lau, Kei May 2013. Investigation of forward voltage uniformity in monolithic light-emitting diode arrays. IEEE Photonics Technology Letters 25 (13) , pp. 1290-1293. 10.1109/LPT.2013.2263223

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Abstract

This letter reports the design and fabrication of optimized electrode structures for matrix addressable monolithic light-emitting diode arrays. The variation of forward voltages of LED pixels in the same row are greatly reduced from 2.62 V (81.9%) to 0.02 V (0.6%) in an 8×,8 LED array. The LED arrays are designed with 8×8 square pixels, 500× 500μ m2 with a 50-μ m wide gap in between. A 24×,24 large-scale blue LED panel is demonstrated with 0.06 V (1.8%) forward voltage variation by integrating nine LED array modules on a 2.2-cm diagonal silicon-based substrate. With a similar concept, a 30,×,30 green LED micro-display with scaled pixel pitch shows excellent display uniformity.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	Institute of Electrical and Electronics Engineers
ISSN:	1041-1135
Last Modified:	05 Jun 2023 09:09
URI:	https://orca.cardiff.ac.uk/id/eprint/155657

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