在环境条件下,在SbBr3后处理的CsPbBr3量子点中提高光发光稳定性和缺陷被动化
Sruthi S1, Swapnika Suresh1, Mohan Raj Subramaniam1
1Department of Physics, Amrita School of Physical Sciences, Amrita Vishwa Vidyapeetham, Coimbatore, Tamil Nadu, India.
概括
反三化物后处理显著增强化量子点,提高光发光量子产量到91%,并改善光电子应用的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 纳米技术 纳米技术
- 固态物理 固态物理
背景情况:
- 无机合物化 Perowskites 由于其优良的性能,在光电子设备中很受欢迎.
- 化 (CsPbBr3) 量子点 (QD) 呈现出高光发光 (PL) 量子产量 (PLQY) 和窄带发射.
研究的目的:
- 为了合成CsPbBr3 QDs使用联结体辅助的再沉.
- 通过用抗三胺进行合成后处理,增强CsPbBr3 QDs的PL稳定性和光电子特性.
主要方法:
- 对于CsPbBr3 QD合成的联体辅助再沉方法.
- 合成后使用抗氧化三胺进行治疗.
- 使用高分辨率传输电子显微镜 (HRTEM),X射线衍射 (XRD) 和X射线光电子光谱 (XPS) 的表征.
主要成果:
- 用抗氧三胺进行后处理,改善了PL的稳定性和光电子特性.
- 实现了91%的PLQY,并保持了8天的发光.
- HRTEM显示了更有序的,大小均的QD;XRD显示混合晶相;XPS证实了的存在和缺陷被动化.
结论:
- 抗三胺后处理有效地使缺陷无效,并提高了CsPbBr3 QDs的稳定性.
- 由于高的PLQY和延长寿命,改进的CsPbBr3 QD对光电子应用如光探测器和LED有很大的希望.
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