Triple-layer remote phosphor structure: a novel option for the enhancement of WLEDs’ color quality and luminous flux

• Autorzy: Thi My Hanh Nguyen , That Phung Ton , Anh Nguyen Doan Quoc , Thanh Trang Tran

Identyfikatory

DOI

10.2478/msp-2020-0076

• Języki publikacji: EN

Abstrakty

EN

The remote phosphor as a lighting structure has outstanding luminous efficiency compared to other options, such as conformal or in-cup. However, the lack of uniformity in distributed color has prevented remote phosphor from wider development. The answer to the chromatic performance enhancement that has been suggested by numerous researchers is the multi-layer configuration with two or three different types of chromatic phosphor. The research purpose is to select the best configuration for multi-chip white LEDs (WLEDs) to achieve optimal results in color quality scale (CQS), color rendering index (CRI), light output and color homogeneity. WLEDs mentioned in this paper have two distinct color temperatures, 6600 K and 7700 K. Experimental results show that the remote phosphor structure with three phosphor layers is superior in terms of color rendering, chromatic performance, and emitted light. The deviation of correlated color measured in this structure is also low, which means that the color uniformity is greatly enhanced in this multi-layer lighting structure. This result can be demonstrated by analyzing the scattering characteristics of the phosphoric layers using the Mie theory. The research findings have proven the effectiveness of the multi-phosphor configuration and can serve as a guideline to fabricate WLEDs with better performance.

Słowa kluczowe

EN

remote-phosphor; dual-layer phosphor; triple-layer phosphor; color rendering index; luminous efficacy; Mie-scattering theory

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2020
• Tom: Vol. 38, No. 4
• Strony: 654--660
• Opis fizyczny: Bibliogr. 22 poz., rys.

Twórcy

autor

Thi My Hanh Nguyen

• Faculty of Mechanical Engineering, Industrial University of Ho Chi Minh City, Viet Nam

autor

That Phung Ton

• Faculty of Electronics Technology, Industrial University of Ho Chi Minh City, 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

Thanh Trang Tran

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

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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 (2021).