容易合成稳定且高发光的甲基化纳米晶,用于高效发光设备
Yasser Hassan1, Olivia J Ashton1, Jong Hyun Park2
1Clarendon Laboratory, Department of Physics , University of Oxford , Parks Road , Oxford OX1 3PU , United Kingdom.
Journal of the American Chemical Society
|January 4, 2019
概括
研究人员开发了用于发光二极管 (LED) 的稳定,高度发光的甲基三化纳米晶体. 这一突破增强了红色和蓝色的发射能力,
科学领域:
- 材料科学
- 纳米技术
- 固态物理
背景情况:
- 由于可调色的颜色和高发光度,金属化物矿对发光二极管 (LED) 是有前途的.
- 与绿色和红外相比,目前的红色和蓝色矿发射器在外部量子效率 (EQE) 中落后.
研究的目的:
- 合成稳定,高度发光的甲基三化物 (CH3NH3PbI3) 晶.
- 为了实现红色和蓝色发光二极管 (LED) 的可调节发射.
主要方法:
- 使用乙酸/甲基胺溶剂和烯抗溶剂的联辅助沉技术.
- 调节连接物比率,连接物与多的比率,以及多结晶的温度.
- 与盐混合以获得红色的排放.
主要成果:
- 合成的立方CH3NH3PbI3矿纳米晶体,光发光量产量超过93%.
- 在660-705nm之间实现可调节的发射和635nm的红色发射.
- 开发的基于矿的LED具有2.75%的最大电解质EQE.
结论:
- 通过受控合成可以实现稳定,高发射度的矿纳米晶体.
- 这种方法有助于开发高效的红色和蓝色发射器,用于全彩显示器和白色LED.
- 进一步优化可能会提高基于矿的发光装置的性能.
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