Highly efficient blue‐emitting phosphor via charge compensation strategy and its application for white LED lighting
Year: 2023
Type: article
Abstract: Highly efficient phosphors are indispensable for near‐ultraviolet (n‐UV) pumped white light emitting diodes (WLEDs). In this work, a novel blue emitting Sr 6 GdSc(BO 3 ) 6 :0.08Ce 3+ phosphor was synthesized, exhibiting a broadband blue emission (full width at half‐maximum (FWMH) = 133 nm) excited by 375 nm. Furthermore, the blue emission of Sr 6 GdSc(BO 3 ) 6 :0.08Ce 3+ was enhanced by 3.9 times through codoping Na + ions due to the influence of charge compensation and micromorphology and size of phosphor particles. At the same time, the internal quantum efficiency was improved from 45.4% to 98.6% and the external quantum efficiency up to 75.0%. Finally, the 365 nm excited two WLED devices were constructed by integrating Sr 6 GdSc(BO 3 ) 6 :0.08Ce 3+ , Sr 6 GdSc(BO 3 ) 6 :0.08Ce 3+ ,0.08Na + , commercial green and red phosphors with high color rendering index. These results reveal that the phosphors have prospective application in high‐quality warm white lighting.
DOI: 10.1111/jace.19474
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4387139404