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Related Experiment Video

Updated: Apr 22, 2026

Fabrication of White Light-emitting Electrochemical Cells with Stable Emission from Exciplexes

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Published on: November 15, 2016

Curved remote phosphor structure for phosphor-converted white LEDs.

Shang-Ping Ying, Han-Kuei Fu, Huang-Zong Tu

|October 17, 2014

Summary

This study improved phosphor-converted light emitting diodes by using a curved remote phosphor layer. This design enhances luminous efficacy and color uniformity for lighting applications.

Area of Science:

Solid-state lighting
Optoelectronics
Materials science

Background:

Conventional remote phosphor structures in light emitting diodes (LEDs) face limitations due to total internal reflection.
Optimizing light extraction efficiency and luminous efficacy is crucial for advanced LED applications.

Purpose of the Study:

To investigate the impact of a curved remote phosphor layer on the performance of phosphor-converted light emitting diodes.
To analyze the package extraction efficiency and luminous efficacy of novel curved remote phosphor structures.

Main Methods:

Fabrication of a phosphor-converted light emitting diode utilizing a curved remote phosphor layer.
Implementation of ray tracing simulations to analyze package extraction efficiency.
Experimental evaluation of luminous efficacy and color uniformity.

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Low-energy Cathodoluminescence for OxyNitride Phosphors

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Main Results:

The curved remote phosphor structure significantly reduced total internal reflection at the air-phosphor interface.
Package extraction efficiency and luminous efficacy were demonstrably improved compared to flat structures.
The convex remote phosphor structure exhibited high luminous efficacy and excellent color uniformity.

Conclusions:

A curved remote phosphor layer is an effective strategy for enhancing LED performance.
The developed convex remote phosphor structure shows great promise for practical lighting applications.
This design offers a pathway to more efficient and uniform solid-state lighting solutions.