Study of ZnS:Mn2+,Te2+ phosphor for improving the hue rendering indicator of WLEDs

Van Liem Bui, Nguyen Thi Phuong Loan, Phan Xuan Le

Abstract


This research combines a phosphor-in-glass (PiG) YAG:Ce3+ with a red liquid-type quantum dot (LQD) to invent high-quality white light-emitting diodes (WLEDs). When the PiG LQD-built WLEDs reach 100 mA, they provide heated white illumination offering an outstanding color rendering index (CRI) (Ra=93.9, R9=97.7, and R13=98.1). The luminescent efficiency (LE) and correlating chromatic temperature, correspondingly, are 62 lm/W and 3764 K. In comparison to PiG integrated with solid-kind quantum dot, it has great LE, remarkable CRI, and lower top layer temperature because of self-aggregation and impediment in the outside flaws in semiconductor quantum dots (QDs) of the solid-condition, as well as effective thermal dissipation. The findings suggest that the produced WLEDs could be potential in high-quality lighting applications.

Keywords


Colour rendered indice; Dual-layer remote; Mie-scattered hypothesis; Phosphor geometry WLEDs; Zns:Mn2+,Te2+

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DOI: https://doi.org/10.11591/eei.v11i4.4061

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