发光学报2025，Vol.46Issue(9)：1627-1638,12.DOI:10.37188/CJL.20250111
Bi3+激活LaSr2SbO6双钙钛矿的宽带红光发射及其性能优化
Broad Red Emission and Luminescence Optimization of Bi3+Doped LaSr2 SbO6 Double Perovskite
摘要
Abstract
Red-emitting materials have significant applications in full-spectrum lighting,plant growth and medical health fields.Nevertheless,the development of thermally-stable broad-band red-emitting materials is still key issue.Due to the 6s2 outer electron configuration of Bi3+ions,the energy splitting can be controllably adjusted by the sur-rounding crystal field environment,further achieving the luminescence tuning over the visible and near-infrared re-gion.Herein,we successfully achieve the doping of Bi3+ions in LaSr2SbO6 double perovskite structure with broad-band orangish red emission.LaSr2SbO6∶Bi3+material exhibits broad excitation in the region of 300-450 nm,match-ing well with the commercial near-ultraviolet InGaN chip.Under 370 nm excitation,the optimal emission wavelength locates at 600 nm,with the full width at half maximum of 108 nm.The accurate structure analysis and theorical cal-culations confirm that Bi3+ions preferentially occupy at La3+site.Through adding H3BO3 as flux and designing het-erovalent substitution strategy,the luminescence efficiency optimization,spectral tuning and thermal stability en-hancement are further achieved.As a result,the luminescence efficiency can reach 46%,around 30 nm redshift can be adjusted.Meanwhile,LaSr2SbO6∶Bi3+material presents superior thermal stability.Even anti-thermal-quenching performance can be obtained in the region of 77-300 K,of which the luminescence intensity at 252 K can realize 141%of that at 77 K based on the addition of H3BO3 flux.Good thermal stability can be also achieved in the region of 298-523 K,the luminescence intensity at 423 K can keep 76%than that at room temperature.The above lumines-cence optimization can be attributed to the following reasons.First,the addition of H3BO3 flux reduces the generation of La3SbO7 impurities and increases the crystallizes of samples.Then,heterovalent substitution strategy can induce the localized structure modulation surrounding Bi3+ions.The proposed luminescence optimization strategy can pro-vide reference for the development and improvement of Bi-activated red-emitting materials.关键词
红光材料/Bi3+离子掺杂/双钙钛矿结构/异价取代Key words
red-emitting materials/Bi3+doped/double perovskite structure/heterovalent substitution分类
数理科学引用本文复制引用
孙瑾璇,廖寒蕊,李微,王威,魏忆,李国岗..Bi3+激活LaSr2SbO6双钙钛矿的宽带红光发射及其性能优化[J].发光学报,2025,46(9):1627-1638,12.基金项目
国家自然科学基金(12374386,52402207) （12374386,52402207）
中国博士后科学基金资助项目(2024M753024,GZC20241594) （2024M753024,GZC20241594）
湖北省博士后项目资助(2024HBBHJD098) （2024HBBHJD098）
深圳市科学技术创新委员会(JCYJ20240813114017022)Supported by National Natural Science Foundation of China(12374386,52402207) （JCYJ20240813114017022）
China Postdoctoral Science Foundation(2024M753024,GZC20241594) （2024M753024,GZC20241594）
Postdoctor Project of Hubei Province(2024HBBHJD098) （2024HBBHJD098）
Science and Technology In-novation Commission of Shenzhen(JCYJ20240813114017022) （JCYJ20240813114017022）
