期刊
IEEE PHOTONICS TECHNOLOGY LETTERS
卷 25, 期 13, 页码 1290-1293出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2013.2263223
关键词
Gallium compounds; light-emitting diodes; arrays; flip-chip devices
资金
- Research Grants Council of the Hong Kong Special Administrative Region Government [T23-612/12-R]
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 8x8 LED array. The LED arrays are designed with 8x8 square pixels, 500x500 mu m(2) with a 50-mu m wide gap in between. A 24x24 large-scale blue LED panel is demonstrated with 0.06V (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 30x30 green LED micro-display with scaled pixel pitch shows excellent display uniformity.
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