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University of Zilina, Slovakia

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The University of Sydney, Australia

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University of Zilina, Slovakia

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National Taiwan University of Science and Technology, Taiwan, Province of China

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UPC Broadband Slovakia, Slovakia

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University of Defence, Czech Republic

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University College Dublin, Ireland

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VSB - Technical University of Ostrava, Czech Republic

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Brno University of Technology, Czech Republic

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Brno University of Technology, Czech Republic

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Brno University of Technology, Czech Republic

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University of Zilina, Slovakia

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Ankara University, Turkey

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VSB - Technical University of Ostrava, Czech Republic

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Academy of Sciences of the Czech Republic, Czech Republic

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University of Defence, Czech Republic

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Brno University of Technology, Czech Republic

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Technical University of Radom, Poland

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Technical University of Kosice, Slovakia

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University of Rome "La Sapienza", Italy

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University of Economics in Katowice, Katowice, Poland

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Honeywell International, Czech Republic

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Brno University of Technology, Czech Republic

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Sutcu Imam University, Turkey

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Slovak University of Technology, Slovakia

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VSB - Technical University of Ostrava, Czech Republic

Wasiu Oyewole Popoola
The University of Edinburgh, United Kingdom

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Tomas Bata University in Zlin, Czech Republic

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University of Zilina, Slovakia

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University of Defence, Czech Republic

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Technical University of Cluj Napoca, Romania

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National Research University "MPEI", Russian Federation

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Guanajuato University, Mexico

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University of Pardubice, Czech Republic

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University of West Bohemia in Plzen, Czech Republic

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Technical University of Cluj Napoca, Romania

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Warsaw University of Technology, Poland

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Isfahan University of Technology, Iran, Islamic Republic Of

Mauro Tropea
DIMES Department of University of Calabria, Italy

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Brno University of Technology, Czech Republic

Martin Vaculik
University of Zilina, Slovakia

Viktor Valouch
Academy of Sciences of the Czech Republic, Czech Republic

Vladimir Vasinek
VSB - Technical University of Ostrava, Czech Republic

Jiri Vodrazka
Czech Technical University in Prague, Czech Republic

Miroslav Voznak
VSB - Technical University of Ostrava, Czech Republic

Otakar Wilfert
Brno University of Technology, Czech Republic

Jan Zidek
VSB - Technical University of Ostrava, Czech Republic


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Enhancing Lighting Performance of White LED Lamps by Green Emitting Ce,Tb Phosphor

Nguyen Doan Quoc Anh, Tran Hoang Quang Minh, Nguyen Huu Khanh Nhan

DOI: 10.15598/aeee.v14i5.1795


Abstract

With the development of high-efficiency and high-power Light-Emitting Diodes (LEDs), it has become possible to use LEDs in lighting and illumination. In last decades, developing a new method for improving lumen output and Angular Color Uniformity (ACU) is the main direction in LED technology. In this paper, an innovative approach for enhancing lighting performance (lumen output and angular color uniformity) of Multi-Chip White LED lamps (MCW-LEDs) was proposed and demonstrated by mixing the green Ce0.67Tb0.33MgAl11O19: Ce,Tb (CeTb) phosphor into their phosphor compounding. With varying CeTb concentration, ACU and lumen output with Conformal Phosphor Package (CPP) and In-cup Phosphor Package (IPP) are calculated, displayed and analyzed. The results show that the lumen output and the ACU of 7000 K and 8500 K MCW-LEDs increased remarkably in comparison with the older works. Using green CeTb is a prospective method for improving lighting performance of MCW-LEDs in future.

Keywords


Angular color uniformity; Ce0.67Tb0.33MgAl11O19: CeTb; lighting performance; lumen output; multi-chip white LED lamps.

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