一种独特的方法,通过反向缺陷能量水平控制方法显著提高Cr3+的排放强度
Chengyu Cai1, Chuang Wang1, Nana Jia1
1College of Materials and Environmental Engineering, Bohai University, Jinzhou 121000, PR China.
Journal of colloid and interface science
|January 21, 2026
概括
研究人员开发了一种新的缺陷控制方法,通过防止Cr3+和Cr4+离子之间的能量转移来增强近红外 (NIR) 辐射. 这大大提高了LED和太阳能电池中的发光强度和效率.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 发光的光度是非常的低.
背景情况:
- 在各种应用中,Cr3+化近红外 (NIR) 极为重要.
- 在中存在的Cr3+和Cr4+离子往往会降低光强度和NIR效率.
- 现有的方法很难有效地管理离子相互作用以获得最佳性能.
研究的目的:
- 引入一种新的反向缺陷能量水平控制方法,以提高Cr3+排放.
- 为了阻断从Cr3+到Cr4+离子的能量传输路径.
- 为了提高Cr3+合光体的发光强度和NIR效率.
主要方法:
- 化Sr2+离子变成Ba9Sc2Si6O24:Cr3+/Cr4+.
- 使用发光动力学测试,热发光 (TL) 频谱分析和理论计算.
- 合成NIR光转换发光二极管 (pc-LED) 并将光与c-Si太阳能电池集成.
主要成果:
- 实现了发光强度增加10倍,量子效率从2.9%提高到25.6%.
- 将半最大全宽度 (FWHM) 从461nm减少到180nm,这是一个创纪录的成就.
- 通过精确的缺陷调节,Cr3+和Cr4+之间的能量传输效率从76.85%降至0%.
- NIR pc-LED显示了8.5%的光电效率和28mW的NIR输出功率.
- 将c-Si太阳能电池的相对转换效率提高了31.2%.
结论:
- 反向缺陷能量水平控制方法有效地通过抑制Cr3+到Cr4+的能量传输来增强Cr3+的发光.
- 这一战略为优化光电子设备中的NIR光体提供了一条新的途径.
- 开发的光体显示出提高NIR pc-LED和太阳能电池性能的巨大潜力.
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