近日，中山大学王静团队实现了激光驱动的发光陶瓷转换近红外II光源用于先进的成像和检测技术。该项研究成果发表在2025年9月11日出版的《光：科学与应用》杂志上。

由发光陶瓷组成的激光驱动近红外II （NIR-II）光强是一个很有前途的研究前沿，但其发展仍然受到当前发光材料的外量子效率（EQE）和热稳定性瓶颈的制约。

研究组提出了一种非等效阳离子取代策略来制备高效半透明MgO:Ni²⁺， Cr³⁺ NIR-II发光陶瓷。Cr³⁺的共掺杂诱导了Ni²⁺占据的八面体位点的结构畸变，有效地打破了奇偶禁止的d-d跃迁约束，同时实现了从Cr³⁺到Ni²⁺的有效能量转移。这些协同效应产生了显著的内部和外部量子效率，分别为61.06%和39.69%。开发的陶瓷具有出色的热管理能力，在478K下具有31.28W·m⁻¹·K⁻¹的导热系数和92.11%的发射保持率。

当集成到激光驱动的NIR-II光传感器中时，该系统达到了创纪录的214mW输出功率21.43W/mm²蓝色激光激发。实践证明，具有5.29 lp/mm的空间分辨率和0.97的对比度，具有优越的无损成像能力。这项工作为在先进成像和检测技术中开发高性能NIR-II光敏元件建立了新的范例。

附：英文原文

Title: Laser-driven luminescent ceramic-converted near-infrared II light source for advanced imaging and detection techniques

Author: Gu, Simin, Lian, Huiwang, Kuang, Rongyi, Lou, Bibo, Ma, Chonggeng, Liu, Gaochao, Wang, Jing

Issue&Volume: 2025-09-11

Abstract: Laser-driven near-infrared II (NIR-II) light sources comprising luminescent ceramics represent a promising research frontier, yet their development remains constrained by the external quantum efficiency (EQE) and thermal stability bottleneck of current luminescent materials. Herein, we present a non-equivalent cation substitution strategy to fabricate high-efficiency translucent MgO:Ni2+, Cr3+ NIR-II luminescent ceramics. The co-doping of Cr3+ induces structural distortion at Ni2+-occupied octahedral sites, effectively breaking the parity-forbidden d-d transition constraint while enabling efficient energy transfer from Cr3+ to Ni2+. These synergistic effects yield remarkable internal and external quantum efficiencies of 61.06% and 39.69%, respectively. The developed ceramic demonstrates exceptional thermal management capabilities with 31.28W·m1·K1 thermal conductivity and 92.11% emission retention at 478K. When integrated into laser-driven NIR-II light sources, the system achieves record-breaking performance of 214mW output power under 21.43W/mm2 blue laser excitation. Practical demonstrations showcase superior non-destructive imaging capabilities with 5.29 lp/mm spatial resolution and 0.97 contrast ratio. This work establishes a new paradigm for developing high-performance NIR-II light sources in advanced imaging and detection technologies.

DOI: 10.1038/s41377-025-01953-4

Source: https://www.nature.com/articles/s41377-025-01953-4