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

Van Liem Bui (Van Lang University)
Nguyen Thi Phuong Loan (Posts and Telecommunications Institute of Technology)
Phan Xuan Le (Van Lang University)

Bulletin of Electrical Engineering and Informatics
Vol 11, No 4: August 2022

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.