首页> 外文期刊>Advanced Functional Materials >Efficient Blue Phosphorescent OLEDs with Improved Stability and Color Purity through Judicious Triplet Exciton Management
【24h】

Efficient Blue Phosphorescent OLEDs with Improved Stability and Color Purity through Judicious Triplet Exciton Management

机译:通过明智的三重态激子管理,具有改进的稳定性和色纯度的高效蓝色磷光OLED

获取原文
获取原文并翻译 | 示例
           

摘要

Highly efficient and stable blue phosphorescent organic light-emitting diodes are achieved by employing a step-wise graded doping of platinum(II) 9-(pyridin-2-yl)-2-(9-(pyridin-2-yl)-9H-carbazol-2-yloxy)-9H-carbazole (PtNON) in a device setting. A device employing PtNON demonstrates a high peak external quantum efficiency (EQE) of 17.4% with an estimated LT70 lifetime of over 1330 h at a brightness of 1000 cd m(-2). PtNON is then investigated as a "triplet sensitizer" in an alternating donor-acceptor doped emissive layer to further improve the device emission color purity by carefully managing an efficient Forster resonant energy transfer from PtNON to 2,5,8,11-tetra-tert-butylperylene as a selected acceptor material. Thus, such OLED devices demonstrate an EQE of 16.9% with color coordinates of (0.16, 0.25) and an estimated luminance (LT70) lifetime of 628 h at a high brightness of 1000 cd m(-2).
机译:通过逐步逐步掺杂铂(II)9-(吡啶-2-基)-2-(9-(吡啶-2-基)-9H),可以实现高效且稳定的蓝色磷光有机发光二极管-carbazol-2-yloxy)-9H-咔唑(PtNON)在设备设置中。使用PtNON的器件在1000 cd m(-2)的亮度下具有17.4%的高峰值外部量子效率(EQE),估计的LT70寿命超过1330 h。然后,通过仔细管理从PtNON到2,5,8,11-tetra的有效Forster共振能量转移,在交替的供体-受体掺杂的发光层中将PtNON作为“三重态感光剂”进行研究,以进一步提高器件的发射色纯度。 -叔丁基per作为选定的受体材料。因此,此类OLED器件在1000 cd m(-2)的高亮度下,色坐标为(0.16,0.25)的EQE为16.9%,估计的亮度(LT70)寿命为628 h。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号