The Lu-PiG was prepared by a one-step low-temperature co-sintering technique.
A red phosphor layer was screen-printed on the Lu-PiG substrate.
The R&Lu-PiG color-converter exhibits excellent thermal stability.
The R&Lu-PiG based WLED realizes a facile chromaticity tuning.
The R&Lu-PiG is a candidate of color converter in high-power warm WLED.