功能组件驱动的相位稳定和缺陷被动化,以实现高效和空气稳定的近红外发光二极管
Xinzhen Ji1, Yiping Yang1, Xiaoyang Xing1
1Key Laboratory of Materials Physics of Ministry of Education, School of Physics, Zhengzhou University, Daxue Road 75, Zhengzhou 450052, China.
Nano letters
|December 29, 2025
概括
这项研究提高了酸 (CsSnI3) 近红外发射器的空气稳定性,使用双离子替代. 这一突破使得稳定的矿设备可以用于诸如夜视和医学成像等应用.
科学领域:
- 材料科学 材料科学 材料科学
- 固态化学 固态化学
- 光电学是指光电子产品.
背景情况:
- 全无机CsSnI3是一种有前途的近红外发射器.
- 它的结构稳定性受到低容忍因子的限制,导致空气中的相位过渡.
研究的目的:
- 为了提高CsSnI3矿材料的结构稳定性和耐空性.
- 为实际应用开发稳定的近红外发光二极管 (LED).
主要方法:
- 开发了一种双离子替代策略,通过用关尼 (GA+) 替换Cs+和用酸 (SCN-) 替换I-.
- 通过组件工程研究了稳定B-γ阶段的结构和化学机制.
- 制造和特征近红外LED,包括修改后的CsSnI3.3.
主要成果:
- 优化了CsSnI3的耐受性因子 (t),使B-γ相在环境空气中稳定超过200分钟.
- 证明SCN-抑制了Sn2+的氧化,GA+通过H-结合抑制了V_I的形成.
- 取得了6.01%的峰值外部量子效率和2500分钟的运行寿命,用于开发的LED.
结论:
- 双离子替代有效地提高了CsSnI3近红外发射器的空气稳定性和性能.
- 基于CsSnI3的稳定LED显示了在夜视,医学成像和非破坏性测试中实际应用的潜力.
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