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Phosphor-in-glass for high-powered remote-type white AC-LED
1Key Laboratory of Design and Assembly of Functional Nanostructures, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou, Fujian 350002, P. R. China.
ACS Applied Materials & Interfaces
|October 21, 2014
Summary
Persistent phosphor-in-glass (PiG) technology reduces flicker in alternating current light-emitting diodes (AC-LEDs). This innovation uses PiG
Area of Science:
- Solid-state lighting
- Materials science
- Optoelectronics
Background:
- Alternating current light-emitting diodes (AC-LEDs) offer cost-effectiveness and efficiency but suffer from unhealthy flicker.
- Flicker in AC-LEDs poses risks to human vision and requires mitigation strategies.
Purpose of the Study:
- To develop a novel solution for mitigating flicker in remote-type AC-LEDs.
- To investigate the efficacy of persistent phosphor-in-glass (PiG) materials for flicker compensation.
Main Methods:
- Development of a persistent phosphor-in-glass (PiG) material activated by blue light.
- Experimental demonstration of PiG afterglow decay for AC time gap compensation.
- Evaluation of inorganic glass as an encapsulant for AC-LEDs.
Main Results:
- The developed PiG exhibits microsecond-range afterglow decay, effectively reducing AC-LED flicker.
- Inorganic glass encapsulation provides superior heat dissipation, reduced glare, and enhanced stability compared to organic alternatives.
- The PiG material demonstrates efficient activation by blue light, enabling flicker compensation.
Conclusions:
- Persistent phosphor-in-glass is a viable technology for suppressing flicker in AC-LEDs.
- Inorganic glass encapsulation offers significant technological advantages for AC-LED performance and longevity.
- This innovation contributes to healthier and more stable semiconductor lighting solutions.
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