| 苏文涛,胡鉴勇.弯曲型双蒽类深蓝荧光材料的设计合成及其电致发光性能研究[J].井冈山大学自然版,2025,46(4):24-37 |
| 弯曲型双蒽类深蓝荧光材料的设计合成及其电致发光性能研究 |
| DESIGN, SYNTHESIS AND ELECTROLUMINESCENT PROPERTIES OF BENT DUAL-ANTHRACENE BASED DEEP BLUE FLUORESCENT MATERIALS |
| 投稿时间：2025-03-03 修订日期：2025-05-06 |
| DOI：10.3969/j.issn.1674-8085.2025.04.004 |
| 中文关键词: 深蓝光OLEDs 三线态-三线态湮灭（TTA） 蒽 |
| 英文关键词: deep-blue OLEDs triplet-triplet annihilation (TTA) anthracene |
| 基金项目:国家自然科学基金面上项目(62374106) |
|
| 摘要点击次数: 137 |
| 全文下载次数: 257 |
| 中文摘要: |
| 本研究设计了一种新型弯曲的p-共轭桥链分子结构，以苯环作为中心的p共轭桥链，在其间位分别引入两个蒽单元，成功制备了两个弯曲型双蒽类深蓝荧光材料分子BD1-MH和BD3-MH。通过该分子设计有效调控了荧光分子的p共轭形态分布，并使蒽单元与邻近苯环的二面角显著增大，由此抑制了分子间π-π堆积作用引发的荧光猝灭效应，最终获得高达85%~87%的荧光量子产率。基于BD1-MH的非掺杂OLED器件表现出422 nm的电致发光峰，实现了材料分子的深蓝发光，对应的CIE色坐标为（0.16,0.08），接近美国国家电视系统委员会（NTSC）规定的标准蓝光坐标（0.14，0.08）。相较于已报道的BD系列分子，仅通过连接位置的调整，就使非掺杂器件电致发光峰发生蓝移。此外，BD3-MH基非掺杂器件也展现出优异的光电性能，最大外量子效率（EQE）达3.66%，且电流效率（CE）达到4.02 cd/A，其实测的EQE值远超理论预测值，这可归因于三线态-三线态湮灭（TTA）的贡献。本研究结果将为开发高效深蓝色OLED材料提供创新思路。 |
| 英文摘要: |
| This study designed a novel curved π-conjugated bridge molecular structure. Utilizing a benzene ring as the central π-conjugated bridge, two anthracene units were introduced at the meta positions of the benzene ring, two bent bianthracene-based deep-blue fluorescent emitters, BD1-MH and BD3-MH, were successfully synthesized. This molecular engineering effectively modulates the π-conjugation distribution and significantly enlarges dihedral angles between anthracene units and adjacent benzene rings, thereby suppressing fluorescence quenching induced by intermolecular π-π stacking and achieving high photoluminescence quantum yields of 85%~87%. The BD1-MH-based non-doped OLED device exhibits an electroluminescence peak at 422 nm with CIE coordinates of (0.16, 0.08), approaching the National Television System Committee (NTSC) standard blue specification (0.14, 0.08). Notably, compared to previously reported BD-series analogues, a blue-shifted electroluminescence peak is achieved in non-doped architecture solely through positional isomerism of branched-chain connections. Furthermore, the BD3-MH-based device demonstrates exceptional optoelectronic performance, achieving a maximum external quantum efficiency (EQE) of 3.66% and current efficiency (CE) of 4.02 cd/A. The experimentally observed EQE substantially exceeds theoretical predictions, attributed to triplet-triplet annihilation (TTA) contributions. This work provides innovative strategies for developing high-efficiency deep-blue OLED emitters. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
