Self-Assembled Two-Dimensional Surface Structures for Beam Shaping of GaN-Based Vertical-Injection Light-Emitting Diodes
Self-Assembled Two-Dimensional Surface Structures for Beam Shaping of GaN-Based Vertical-Injection Light-Emitting Diodes
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DOI：
10.1109/lpt.2009.2034470
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发表时间：
2010
影响因子：
2.6
通讯作者：
M. Tsai;P. Yu;C. Chiu;H. Kuo;T. Lu;S.H. Lin
中科院分区：
文献类型：
--
作者：
M. Tsai;P. Yu;C. Chiu;H. Kuo;T. Lu;S.H. Lin
研究了利用仿生表面结构增强GaN基垂直注入发光二极管(VI-LED)的光提取和光束整形。利用自组装聚苯乙烯纳米球作为单层掩膜，然后进行各向异性感应耦合等离子体反应离子刻蚀，制备了仿生表面结构。在350 mA的驱动电流下，具有图案化结构的VI-LED的光输出功率比没有任何表面结构的VI-LED的效率提高了68%。该结构还产生了改进的心形辐射图案，其更适合于平板显示器中的背光应用。
Enhanced light extraction and beam shaping of GaN-based vertical-injection light-emitting diodes (VI-LEDs) employing biomimetic surface structures were demonstrated. The biomimetic surface structures were fabricated using self-assembled polystyrene nanospheres serving as a monolayer mask, and followed by anisotropic inductively coupled plasma reactive ion etching. The light output power of the VI-LEDs with the patterned structures exhibited an efficiency enhancement factor of 68% at a driving current of 350 mA, compared to those without any surface structures. The structures also resulted in a modified heart-shaped radiation pattern, which is preferable for backlight applications in flat panel displays.