Efficient flip-chip InGaN micro-pixellated light-emitting diode arrays: promising candidates for micro-displays and colour conversion
Efficient flip-chip InGaN micro-pixellated light-emitting diode arrays: promising candidates for micro-displays and colour conversion
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DOI：
10.1088/0022-3727/41/9/094002
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发表时间：
2008-04
期刊：
影响因子：
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通讯作者：
Z. Gong;E. Gu;S. Jin;D. Massoubre;B. Guilhabert;H. Zhang;M. Dawson;V. Poher;G. Kennedy;
中科院分区：
文献类型：
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作者：
Z. Gong;E. Gu;S. Jin;D. Massoubre;B. Guilhabert;H. Zhang;M. Dawson;V. Poher;G. Kennedy;
给出了具有高像素密度和改进的设备性能的Flip-Chip Ingan微像素的LED阵列，每个设备都具有64×64个元素，在50 µm的螺距上具有20 µm的发射孔，并在蓝色（470 nm）和UV（370 nm）上制造了可达的。图标坐骑。证明，可以归因于每个N-GAN MESA的n-金属轨道，并且在平行列中运行的P接触线，通过翻转芯片配置，光输出和这些新设备的当前处理能力大大提高了效果。 LED阵列可以在极高的电流密度（分别为6.5 w cm-2）上提供最高的电流密度，然后将这些翻转芯片设备与计算机可编程的驱动程序电路界面相结合，以产生其他有望的LED，例如，这些FLIP-CHIP设备与计算机可编程的驱动程序界面相结合。
Flip-chip InGaN micro-pixellated LED arrays with high pixel density and improved device performance are presented. The devices, with 64 × 64 elements, each of which have a 20 µm emission aperture on a 50 µm pitch, are fabricated with a matrix-addressable scheme at blue (470 nm) and UV (370 nm) wavelengths, respectively. These devices are then flip-chip bonded onto silicon mounts. Good emission uniformity across the LED array is demonstrated, which can be attributed to the introduced n-metal tracks adjacent to each n-GaN mesa and the p-contact lines running across parallel columns. More importantly, with a flip-chip configuration, the optical power output and the current-handling capability of these new devices are substantially enhanced, due to the improved heat dissipation capability and the increased light extraction efficiency. For instance, each pixel in the flip-chip blue (respectively UV) LED arrays can provide a maximum power density 43 W cm−2 (respectively 6.5 W cm−2) at an extremely high current density up to 4000 A cm−2 before breakdown. These flip-chip devices are then combined with a computer-programmable driver circuit interface to produce high-quality micro-scale displays. Other promising applications of these LEDs, such as colour conversion with quantum dots, are also demonstrated.