Triple-layer remote phosphor: An improved structure with higher color quality and luminous flux of white LEDs

Tiến sĩLê Hùng TiếnTiến sĩPhan Xuân Lễ

Khoa Kỹ Thuật

Thể loại: Kỷ yếu

Sơ lược nội dung

This research suggests using triple-layer remote phosphor (TRP) to improve the color quality and luminous flux coming out of white LEDs (WLEDs). The TRP structure contains three different phosphor layers: beneath is the yellow phosphor YAG:Ce in within. Controlling the red-light composition with a red phosphor layer LiInO2:Eu 3+, a red phosphor LiInO2:Eu 3+ above, and a green phosphor Zn2GeO4:Mn 2+ leads to a higher color rendering index (CRI). Thus, increase the luminous efficacy (LE) of WLEDs using a green phosphor layer of CaLaB3O7:Ce 3+ to monitor green light composition. Additionally, when increasing these two phosphor concentrations, the yellow concentration YAG:Ce 3+ 2+ ,Mn 3+ decreases to keep the average correlated color temperatures (ACCTs) within 6000K - 8500K. Besides CRI and LE, controlling green and red phosphor concentration is also a way to analyze the color quality scale (CQS). The study result shows that the higher the LiInO2:Eu concentration, the greater the CRI value. However, CRI significantly reduces when increasing Zn2GeO4:Mn 3+ concentration. Meanwhile, CQS can raise a substantial amount in the concentration range of 10%-14% LiInO2:Eu 2+ concentration. Peculiarly, parallel with the improvement of CRI and CQS, LE also grows over 40% due to a decrease in backscattering light and added green light. This research may be valuable for manufactures for improving the color quality and luminous flux of WLEDs. 3+ , flout LiInO2:Eu 3+ Keywords: WLEDs, Triple-layer structure, Remote phosphor package, Color quality, Luminous flux

Thông tin chung
Thể loại
Kỷ yếu
Năm xuất bản
05 Thg11 2021
Ngôn ngữ gốc
Tiếng Anh
Tạp chí công bố
AIP Conference Proceedings
Ấn phẩm số
Vol. 2420, No. 010001 (2021)
Loại tạp chí
Danh mục Scopus
Mã ISBN
978-0-7354-4137-8
Chất lượng
Không phân Q

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