发光学报2026，Vol.47Issue(8)：1412-1424,13.DOI:10.37188/CJL.20260125
Cs2ZrCl6∶Pt4+/Ln3+的蓝光激发近红外发光及机理
Blue Light Excitation Near-infrared Luminescence and Mechanism of Cs2ZrCl6∶Pt4+/Ln3+
摘要
Abstract
Efficient blue-light-excited near-infrared(NIR)phosphors are of great significance for bioimaging and night vision.We synthesized Ln3+(Cr3+,Yb3+,Nd3+,Er3+)and Pt4+co-doped Cs2ZrCl6 NIR phosphors via the copre‑cipitation method.Based on the Cs2ZrCl6 double perovskite structure,Ln3+doping led to various NIR-Ⅰ and NIR-Ⅱ emissions(Cr3+:900 nm,Yb3+:1 002 nm,Nd3+:1 070 nm,Er3+:1 539 nm).Pt4+sensitization enables blue-light excitation,which can match blue chips.Through the analysis of the decay curve,this process can be ascribed to the combined effects of energy transfer and energy migration.Notably,the Nd3+-doped sample achieved a photolumines‑cence quantum yield of 16.0％.A NIR phosphor-converted LED device was fabricated using this phosphor and a blue chip,demonstrating its potential in night vision applications.By comparing the photoluminescence and other properties of Bi3+,Sb3+,Te4+and Pt4+doped Cs2ZrCl6 phosphors and combining with first-principles calculations,the intrinsic mechanism of the unique blue light absorption ability of Pt4+was analyzed.It was hypothesized that this mainly stemmed from the larger exciton binding energy caused by the smaller ionic radius,thus reducing the energy required for excitation.These findings reveal how the structure influences the self-trapped exciton(STE)binding energy,providing guidance for the design of blue-excited STE phosphors.关键词
近红外发光材料/自陷激子/能量传递/第一性原理计算Key words
near-infrared luminescent materials/self-trapped excitons/energy transfer/first-principles calculations分类
数理科学引用本文复制引用
高明远,王逸超,唐丽阳,程晓敏,唐铭远,陈宝玖..Cs2ZrCl6∶Pt4+/Ln3+的蓝光激发近红外发光及机理[J].发光学报,2026,47(8):1412-1424,13.基金项目
国家自然科学基金(52473291) （52473291）
中央高校基本科研业务费(3132025195)Supported by National Natural Science Foundation of China(52473291) （3132025195）
Fundamental Research Funds for the Central Univer‑sities(3132025195) （3132025195）
