Highly Reliable and Low-Cost Fabrication of Warm-White LEDs Using Composite Silica Photonic Crystals
| Autor: | Yu-Chun Lee, Chung-Chieh Chang, Tzong-Liang Tsai, Chun-Feng Lai, Mau-Kuen Wu |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Fabrication Article Subject Renewable Energy Sustainability and the Environment business.industry Composite number lcsh:TJ807-830 lcsh:Renewable energy sources Phosphor General Chemistry Atomic and Molecular Physics and Optics law.invention Luminous flux law Optoelectronics General Materials Science Luminous efficacy business Diode Photonic crystal Light-emitting diode |
| Zdroj: | International Journal of Photoenergy, Vol 2014 (2014) |
| Popis: | We demonstrated a technique requiring little phosphor that used white light-emitting diodes (WLEDs) containing composite silica colloidal photonic crystals (c-SCPhCs) for developing the warm-WLEDs (w-WLEDs). WLEDs containingc-SCPhCs enhanced luminous efficacy 5.6% more than commercialw-WLEDs did. We used a UV adhesive curing method to improve the adhesion properties of thec-SCPhCs. A reliability analysis (RA) test was performed on the WLEDs containingc-SCPhCs, applying a high temperature and high relative humidity (85°C/85 RH) during WLEDs operation at 120 mA. During a RA test of 2500 h, no visible degradation in optical performance was observed. We implemented a novel, inexpensive technique for producing high luminous fluxw-WLEDs that can be used in residential light. |
| Databáze: | OpenAIRE |
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