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基于量子点的溶液加工,高性能发光二极管.

Xingliang Dai1, Zhenxing Zhang2, Yizheng Jin1

  • 1Center for Chemistry of High-Performance &Novel Materials, State Key Laboratory of Silicon Materials, Cyrus Tang Center for Sensor Materials and Applications, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China.

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概括

研究人员开发了一种高性能,经过溶液处理的量子点LED. 这种深红色发光二极管 (LED) 的效率和寿命可与真空设备相美,为先进显示器铺平了道路.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 光电学是指光电子产品.
  • 纳米技术纳米技术

背景情况:

  • 解决方案处理的光电子设备提供低成本的制造和灵活性.
  • 量子点 (QD) 和基于聚合物的发光二极管 (LED) 是有希望的,但面临性能限制.
  • 现有的溶液加工LED在效率,滚动和寿命方面落后于真空沉积的有机LED.

研究的目的:

  • 开发一种基于量子点的高性能,溶液处理的多层LED.
  • 为了实现与最先进的真空沉积有机LED可比的性能指标.
  • 为了实现下一代显示器和固态照明技术.

主要方法:

  • 使用溶液处理制造基于量子点的多层LED.
  • 在量子点和氧化物电子传输层之间插入一个绝缘层.
  • 光电子属性的表征,包括排放,开启电压,效率,滚动和运行寿命.

主要成果:

  • 实现了色彩和的深红色发射,子带隙启动电压为1.7V.
  • 已证明高外部量子效率 (EQE) 高达20.5%和低效率滚动 (15.1%的EQE在100 mA cm-2).
  • 在100cdm-2下显示了超过10万小时的长寿命,成为处理溶液的最佳性能红色LED.

结论:

  • 优化的设备结构和插入的绝缘层显著改善了电荷平衡,并保持了QD发射性能.
  • 这种溶液处理的量子点LED的性能与真空沉积的有机LED相提并论.
  • 这些发现代表了对未来显示和照明应用的高性能,全解决方案处理量子点LED的重大进步.