Self-assembled two-dimensional surface structures for beam shaping of GaN-based vertical-injection light-emitting diodes

Min An Tsai; Pei-Chen Yu; C. H. Chiu; Hao-Chung Kuo; Tien-Chang Lu; Shiuan-Huei Lin

doi:10.1109/LPT.2009.2034470

Self-assembled two-dimensional surface structures for beam shaping of GaN-based vertical-injection light-emitting diodes

Min An Tsai^*, Pei-Chen Yu, C. H. Chiu, Hao-Chung Kuo, Tien-Chang Lu, Shiuan-Huei Lin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

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.

Original language	English
Article number	5291721
Pages (from-to)	12-14
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	22
Issue number	1
DOIs	https://doi.org/10.1109/LPT.2009.2034470
State	Published - 1 Jan 2010

Keywords

Biomimetic structure
Polystyrene (PS) nanospheres
Vertical-injection light-emitting diodes (VI-LEDS)

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10.1109/LPT.2009.2034470

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title = "Self-assembled two-dimensional surface structures for beam shaping of GaN-based vertical-injection light-emitting diodes",

abstract = "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.",

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AU - Tsai, Min An

AU - Yu, Pei-Chen

AU - Chiu, C. H.

AU - Kuo, Hao-Chung

AU - Lu, Tien-Chang

AU - Lin, Shiuan-Huei

PY - 2010/1/1

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N2 - 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.

AB - 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.

KW - Biomimetic structure

KW - Polystyrene (PS) nanospheres

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Self-assembled two-dimensional surface structures for beam shaping of GaN-based vertical-injection light-emitting diodes

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Keywords

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