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在热和水分下异常稳定

Hwea Yoon Kim¹, Da-Eun Yoon², Junho Jang¹

¹Department of Materials Science and Engineering, KAIST Institute for the Nanocentury, Korea Advanced Institute of Science and Technology (KAIST) , Daejeon 34141, Korea.

Journal of the American Chemical Society

|December 13, 2016

概括

我们开发了一种稳定的素封装量子点 (QD) 膜, 这种新型的QD-silox薄膜为显示应用提供了更高的耐用性.

科学领域:

材料科学
纳米技术
光电子产品

背景情况:

量子点 (QD) 具有独特的光学特性,但在实际应用中经常存在不良稳定性.
现有的封装QD方法可能会随着时间的推移导致降解,化和沉积.
开发基于QD的强大材料对于推进显示和照明技术至关重要.

研究的目的:

使用西洛封装方法制造高度稳定的量子点 (QD) 薄膜.
在各种环境压力下评估QD-silox膜的光发光 (PL) 稳定性
探索QD-silox薄膜在显示应用中的潜力,特别是作为下转换层.

主要方法:

通过混合QDs的西兰前体的sol-gel凝结制造QD-silox薄膜,然后进行自由基添加反应.
在40天内评估QD-oligosiloxane树脂的光学清晰度和QD分散.
在高温,湿度,酸性和基本条件下40天测试PL量子产量 (QY) 的稳定性.
在沸水中浸泡后的排放性能评估.

主要成果:

在一个多月的时间里,即使在高温和湿度下,QD-silox膜也表现出稳定的排放强度.
在没有沉的情况下,QD- 氧化树脂在光学上保持清晰40天.
在恶劣条件下 (85°C/85%RH,酸性,基性),甚至在沸水中,QD-膜的PL QY表现出了显著的稳定性.
发现暴露于水分会增加 QD-silox 薄膜的 PL QY,从而提供一种恢复色薄膜的方法.

结论:

素封装的量子点 (QD) 膜具有特殊的环境和操作稳定性.
这种制造方法避免了连接物交换,简化了过程,提高了树脂的清晰度.
QD-silox膜的强大性能使其非常适合用于显示应用,特别是作为光发光下转换层.

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