A Novel PiGF@Diamond Color Converter with a Record Thermal Conductivity for Laser‐Driven Projection Display
At a Glance
Section titled “At a Glance”| Metadata | Details |
|---|---|
| Publication Date | 2024-06-26 |
| Journal | Advanced Materials |
| Authors | Zikang Yu, Jiuzhou Zhao, Zezhong Yang, Yun Mou, Hongjin Zhang |
| Institutions | Fujian Normal University, Huazhong University of Science and Technology |
| Citations | 57 |
Abstract
Section titled “Abstract”Abstract High‐brightness laser lighting is confronted with crucial challenges in developing laser‐excitable color converting materials with effective heat dissipation and super optical performance. Herein, a novel composite of phosphor‐in‐glass film on transparent diamond (PiGF@diamond) is designed and fabricated via a facile low‐temperature co‐sintering strategy. The as‐prepared La 3 Si 6 N 11 :Ce 3+ (LSN:Ce) PiGF@diamond with well‐retained optical properties of raw phosphor shows a record thermal conductivity of ≈599 W m −1 K −1 , which is about 60 times higher than that of currently well‐used PiGF@sapphire (≈10 W m −1 K −1 ). As a consequence, this color converter can bear laser power density up to 40.24 W mm −2 and a maximum luminance flux of 5602 lm without luminescence saturation due to efficient inhibition of laser‐induced heat accumulation. By further supplementing red spectral component of CaAlSiN 3 :Eu 2+ (CASN:Eu), the PiGF@diamond based white laser diode is successfully constructed, which can yield warm white light with a high color rendering index of 89.3 and find practical LD‐driven applications. The findings will pave the way for realizing the commercial application of PiGF composite in laser lighting and display.