Degradation of optical materials in solid-state lighting systems
| Autor: | Guoqi Zhang, Xuejun Fan, Abbas Bahrami, M. Yazdan Mehr, W.D. van Driel, J. L. Davis |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Light emitting diodes (LEDs) 02 engineering and technology 01 natural sciences law.invention optical materials law Material Degradation Optical materials 0103 physical sciences Materials Chemistry colour maintenance 010302 applied physics material degradation business.industry Mechanical Engineering Metals and Alloys 021001 nanoscience & nanotechnology LED lamp Solid-state lighting Mechanics of Materials Degradation (geology) Optoelectronics 0210 nano-technology business discolouration lumen depreciation Light-emitting diode |
| Zdroj: | International Materials Reviews, 65(2) |
| ISSN: | 1743-2804 0950-6608 |
| DOI: | 10.1080/09506608.2019.1565716 |
| Popis: | In this paper, degradation mechanisms of optical materials, used in the light emitting diode (LED)-based products, are reviewed. The LED lighting is one of the fastest technology shifts in human history. Lighting accounts for almost 20% of the global electrical energy use, inferring that replacement of traditional lighting sources with LEDs with higher efficiencies will have major positive implications for the global energy consumption. Organic optical materials are key components in LEDs in the sense that they control the functionality of the device and they have decisive effects on the durability and reliability of LEDs. This paper aims at describing the influences of chemical structure and service conditions on the degradation mechanisms of organic optical materials in LEDs which lead to the lumen depreciation, discolouration, and colour shift of the LED light output. The contributions of different degradation mechanisms of optical and package materials in LED-based products to the lumen depreciation and colour shift are methodically reviewed. |
| Databáze: | OpenAIRE |
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