Energy extraction from dark Fe3+ in A2Sc2B4O11:Fe3+, Yb3+ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications

Dechao Yu; Haisheng Liu; Mengting Lv; Benchun Li; Yayun Zhou; Xinxin Han; Dawei Zhang

doi:10.1038/s41377-026-02284-8

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Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications

Original Articles

- Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications
- Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications
- Light: Science & Applications 2026年15卷第8期页码：2555-2570
- Affiliations：
  
  1.Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, China
  2.Guangdong-Hong Kong-Macao Joint Laboratory for Intelligent Micro-Nano Optoelectronic Technology, School of Physics and Optoelectronic Engineering, Foshan University, Foshan, China
  3.MOE Key Laboratory of New Processing Technology for Non-ferrous Metals and Materials, Guangxi Key Laboratory of Processing for Non-ferrous Metals and Featured Materials, Guangxi University, Nanning, China
- Author bio：
  
  Dechao Yu (d.yu@usst.edu.cn)
  Dawei Zhang (dwzhang@usst.edu.cn)
- Funds：
- DOI：10.1038/s41377-026-02284-8
  中图分类号：
- 收稿：2025-10-21，
  
  修回：2026-03-18，
  
  录用：2026-03-19，
  
  网络首发：2026-05-09，
  
  纸质出版：2026-08-31
- Accepted：
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Dechao Yu, Haisheng Liu, Mengting Lv, 等. Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications[J]. Light: Science & Applications, 2026,15(8):2555-2570. DOI: 10.1038/s41377-026-02284-8.

Yu, D. C. et al. Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications. Light: Science & Applications, 15, 2555-2570 (2026). DOI: 10.1038/s41377-026-02284-8.
Dechao Yu, Haisheng Liu, Mengting Lv, 等. Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications[J]. Light: Science & Applications, 2026,15(8):2555-2570. DOI: 10.1038/s41377-026-02284-8. DOI：

Yu, D. C. et al. Energy extraction from dark Fe³⁺ in A₂Sc₂B₄O₁₁:Fe³⁺, Yb³⁺ (A = Sr, Ba) toward promoted NIR luminescence and pc-LED light source for multifunctional applications. Light: Science & Applications, 15, 2555-2570 (2026). DOI: 10.1038/s41377-026-02284-8. DOI：

摘要

Abstract

New generation of Cr

-free ec

o-friendly phosphors (no risk of Cr

→ Cr

oxidization toxicity) are highly sought to develop broadband NIR light sources. As an essential element for body health

ion would be an exceptional alternative in strong octahedral crystal field. Here

the Fe

activators were utilized in orthoborate-pyroborate A

for creating novel NIR-emitting phosphors. A broad absorption over 240–450 nm due to O

→ Fe

charge transfer transition was recorded for Sr

:Fe

(SSBO:Fe

) at 370 nm and Ba

:Fe

(BSBO:Fe

) at 355 nm. Resultant NIR emissions with large full width at half maximum about 170 nm were obtained for SSBO:Fe

peaked at 975 nm and BSBO:Fe

at 930 nm. The unique excitation of Fe

doping towards near-ultraviolet (near-UV) region was initially achieved for potential advantage of coupling a mainstream UV chip. Codoping of Yb

into A

:Fe

made emission peak red-shift towards 1000 nm and ~ 160-fold enhancement in the integral intensity owing to a robust energy extraction from the major dark (nonluminous) Fe

. The optimized SSBO:0.02Fe

0.15Yb

exhibited considerable internal and external quantum efficiency ~ 78% and 48%

respectively. Compared to the luminescence thermal stability of ASBO:Fe

(32%@373 K

i.e.

sustaining 32% of its room-temperature emission intensity at 373 K)

the Yb

codoping endowed much superior stability

63%@373 K

and additional temperature sensing with relative sensitivity ~ 1.5% K

−1

at 423 K. Ultimately

by coating the novel phosphors onto UV ~ 365 nm chips

the home-made pc-LEDs were applied in night vision

food inspection

biomedical imagi

and spectroscopy analysis.

关键词

Keywords

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