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Please use this identifier to cite or link to this item: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41312

Title: Conversion of biowaste Asian hard clam (Meretrix lusoria) shells into white-emitting phosphors for use in neutral white LED
Authors: Tsung-Yuan Chang
Chih-Min Wang
Tai-Yuan Lin
Hsiu-Mei Lin
Contributors: 國立臺灣海洋大學:光電科學研究所
Keywords: near-UV
shell waste
solid-state reaction
carbothermic reaction
Date: 2016
Issue Date: 2017-02-14T03:48:32Z
Publisher: Materials
Abstract: Abstract: The increasing volume and complexity of waste associated with the modern economy poses a serious risk to ecosystems and human health. However, the remanufacturing and recycling of waste into usable products can lead to substantial resource savings. In the present study, clam shell waste was first transformed into pure and well-crystallized single-phase white light-emitting phosphor Ca9Gd(PO4)7:Eu2+,Mn2+ materials. The phosphor Ca9Gd(PO4)7:Eu2+,Mn2+ materials were synthesized by the solid-state reaction method and the carbothermic reduction process, and then characterized and analyzed by means of X-ray diffraction (XRD) and photoluminescence (PL) measurements. The structural and luminescent properties of the phosphors were investigated as well. The PL and quantum efficiency measurements showed that the luminescence properties of clam shell-based phosphors were comparable to that of the chemically derived phosphors. Moreover, white light-emitting diodes were fabricated through the integration of 380 nm chips and single-phase white light-emitting phosphors (Ca0.979Eu0.006Mn0.015)9Gd(PO4)7 into a single package of a white light emitting diode (WLED) emitting a neutral white light of 5298 K with color coordinates of (0.337, 0.344).
Relation: 9(16)
URI: http://ntour.ntou.edu.tw:8080/ir/handle/987654321/41312
Appears in Collections:[光電科學研究所] 期刊論文

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