The impacts of Ba2Li2Si2O7:Sn2+,Mn2+ and CaMgSi2O6:Eu2+,Mn2+ particles on the optical properties of remote phosphor LED

• Autorzy: Chen Ming-Jui , Loan Nguyen Thi Phuong , Tho Le Van , Bui Thuc Minh , Le Phan Xuan , Anh Nguyen Doan Quoc , Liao Hsing-Yuan , Chang Jui-Chen , Lee Hsiao-Yi

Identyfikatory

DOI

10.2478/msp-2020-0002

• Języki publikacji: EN

Abstrakty

EN

As implied in the title, the triple-layer remote phosphor (TRP), constructed with the yellow YAG:Ce³⁺ layer at the bottom, the red CaMgSi₂O₆:Eu²⁺,Mn²⁺ phosphor layer on the top, and the green Ba₂Li₂Si₂O₇:Sn²⁺,Mn²⁺ phosphor layer between these two layers, is suggested in this paper to improve the color and luminescence of white LEDs (WLEDs). In order to control the red light for the purpose of increasing the color rendering index (CRI), it is suggested that the red CaMgSi₂O₆:Eu²⁺,Mn²⁺ phosphor should be applied in the TRP structure. Simultaneously, the structure uses the green Ba₂Li₂Si₂O₇:Sn²⁺,Mn²⁺ phosphor layer to control the green light, which increases the luminous efficacy (LE) of WLEDs. In addition, when the concentration of these two phosphors increases, the yellow YAG: Ce³⁺ concentration must be reduced to keep the average correlated color temperatures (ACCTs) stable at 6000 K to 8500 K. Besides, appropriate adjusting of CRI, LE, and color quality scale (CQS) is also analyzed by modifying the concentration of the green phosphor and red phosphor. The results show that the CRI can get better values if CaMgSi₂O₆:Eu²⁺,Mn²⁺ concentration is higher. In contrast, the CRI decreases dramatically when the concentration of Ba₂Li₂Si₂O₇:Sn²⁺,Mn²⁺ increases. Meanwhile, CQS can be significantly increased in the range of 10 % to 14 % CaMgSi₂O₆:Eu²⁺,Mn²⁺, regardless of the concentration of Ba₂Li₂Si₂O₇:Sn²⁺,Mn²⁺. In particular, along with the improvement of CRI and CQS, LE can also be increased by more than 40 % by reducing the scattered light and adding the green light. Obtained results are a valuable reference for manufacturers for improving WLEDs color and luminescence quality to produce a broader range of WLEDs with better quality fulfilling social needs.

Słowa kluczowe

EN

WLEDs; triple-layer structure; remote phosphor package; color quality; luminous flux

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 1
• Strony: 197--205
• Opis fizyczny: Bibliogr. 22 poz., tab., rys.

Twórcy

autor

Chen Ming-Jui

• Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, Taiwan

autor

Loan Nguyen Thi Phuong

• Faculty of Fundamental 2, Posts and Telecommunications Institute of Technology, Ho Chi Minh City, Vietnam

autor

Tho Le Van

• Institute of Tropical Biology, Vietnam Academy of Science and Technology, Ho Chi Minh City, Vietnam Bui Thuc Minh

autor

Bui Thuc Minh

• Faculty of Electrical and Electronics Engineering, Nha Trang University, Nha Trang City, Vietnam

autor

Le Phan Xuan

• Faculty of Electrical and Electronics Engineering, HCMC University of Food Industry, Ho Chi Minh city, Vietnam

autor

Anh Nguyen Doan Quoc

• Faculty of Electrical and Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam

autor

Liao Hsing-Yuan

• Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, Taiwan

autor

Chang Jui-Chen

• Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, Taiwan

autor

Lee Hsiao-Yi

• Department of Electrical Engineering, National Kaohsiung University of Sciences and Technology, Kaohsiung, Taiwan

Bibliografia

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).