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Related Experiment Video

Updated: May 14, 2026

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Local Field Fluorescence Microscopy: Imaging Cellular Signals in Intact Hearts

Published on: March 8, 2017

GaN light emitting diodes with wing-type imbedded contacts.

Ray-Hua Horng¹, Kun-Ching Shen, Yu-Wei Kuo

¹Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung 402, Taiwan. huahorng@nchu.edu.tw

|February 8, 2013

Summary

Wing-type imbedded electrodes (WTIE-LEDs) significantly enhance light output in light-emitting diodes by reducing electrode shading. This novel design boosts light extraction and output power compared to conventional sapphire-based LEDs (CSB-LEDs).

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Area of Science:

Optoelectronics
Materials Science

Background:

Conventional sapphire-based LEDs (CSB-LEDs) suffer from light shading caused by embedded electrodes, limiting light extraction efficiency.
Electrode shading reduces the overall light output power and performance of LED devices.

Purpose of the Study:

To introduce a novel wing-type imbedded electrodes in lateral light emitting diode (WTIE-LED) configuration.
To mitigate light shading issues in LEDs and enhance light extraction and output power.

Main Methods:

Fabrication of WTIE-LEDs with double-side roughened surface structures.
Comparison of optical performance between WTIE-LEDs and CSB-LEDs under various injection currents.

Main Results:

WTIE-LEDs effectively eliminate light shading from electrodes and bonding wires.
A 79% enhancement in output intensity was observed for WTIE-LEDs compared to CSB-LEDs at 100 mA injection current.
Packaged WTIE-LEDs demonstrated a 59% higher output power than packaged CSB-LEDs.

Conclusions:

The imbedded contact design in WTIE-LEDs is a promising approach to overcome light shading limitations.
WTIE-LEDs offer a significant pathway to achieving high output power in light-emitting diode technology.