Crystal-field induced tuning of luminescence properties of Na<sub>3</sub>Ga<sub><i>x</i></sub>Al<sub>1−<i>x</i></sub>F<sub>6</sub>:Cr<sup>3+</sup> phosphors with good thermal stability for NIR LEDs
Jianbang Zhou, Pengyun Chen, Junhao Li, Mingming Yang, Wei Jiang, Qiuhong Zhang, Haiyong Ni, Jiansheng Huo
Abstract
exhibited high luminous efficiency and the emission intensity remained 81% at 423 K compared with the initial value at 298 K. The structural confinement and the electron-phonon coupling (EPC) effect may account for its good thermal stability. Finally, a pc-NIR-LED device with a photoelectric conversion efficiency of 6.53% at 350 mA was fabricated by combining the as-prepared NIR phosphor and a blue InGaN chip, and its applications in night vision and medical fields were further investigated. This work will promote the development of NIR phosphors with tunable luminescence properties.
Topics & Concepts
LuminescencePhosphorMaterials scienceFull width at half maximumPhotoelectric effectCrystal (programming language)OptoelectronicsThermal stabilityAnalytical Chemistry (journal)ChemistryProgramming languageOrganic chemistryChromatographyComputer scienceLuminescence Properties of Advanced MaterialsInorganic Fluorides and Related CompoundsPerovskite Materials and Applications