Solution-processed diarylfluorene derivatives for violet-blue amplified spontaneous emission and electroluminescence,Journal of Materials Chemistry C

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Solution-processed diarylfluorene derivatives for violet-blue amplified spontaneous emission and electroluminescence
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2017-09-05 00:00:00 , DOI: 10.1039/c7tc03536e
Ya-Min Han _{1,

2,

3,

4,

5} , Lu-Bing Bai _{1,

2,

3,

4,

5} , Cheng-Rong Yin _{1,

2,

3,

4,

5} , Chang-Jin Ou _{1,

2,

3,

4,

5} , Xin-Wen Zhang _{2,

4,

5,

6,

7} , Zong-Yan Zuo _{2,

4,

5,

6,

7} , Bin Liu _{2,

4,

5,

6,

7} , Meng-Na Yu _{2,

4,

5,

6,

7} , Jin-Yi Lin _{1,

2,

3,

4,

5} , Jian-Feng Zhao _{1,

2,

3,

4,

5} , Wen-Sai Zhu _{1,

2,

3,

4,

5} , Yu-Yu Liu _{2,

4,

5,

6,

7} , Jie-Wei Li _{1,

2,

3,

4,

5} , Jian-Pu Wang _{1,

2,

3,

4,

5} , Ling-Hai Xie _{2,

4,

5,

6,

7} , Wei Huang _{1,

2,

3,

4,

5}

Affiliation

A series of solution-processable diarylfluorene-based materials with pendent 4-(hexyloxy carbazole)-9,9-diphenyl-9H-fluorene (MC₆Cz) or 4-(octyloxy)-9,9-diphenyl-9H-fluorene (MC₈) as the core and endcapped with different charge transport moieties such as phenylcarbazole (NPC) or triphenylemine (TPA) have been synthesized and investigated systemically. These materials exhibited bright fluorescence emission from violet-blue to deep blue without molecular aggregation in diluted solutions and films. Furthermore, these materials also displayed prominent virtues including superior solution-processability and amorphous characteristics. Consequently, the EL spectra of the solution-processed organic light-emitting diodes (OLEDs) are expected to be similar to the corresponding PL spectra, suggesting intramolecular photophysical behavior. MC₆Cz-9-NPC as an emitting layer presented the highest maximum luminance of about 1560 cd m⁻² with a lower turn on voltage of 3.5 V. In contrast, the ASE results revealed that the MC₈ core-containing compounds exhibited relatively lower thresholds comparable with traditional conjugated or star type polymers, which could be promising optical gain media. We proposed a novel molecular design strategy to construct high-performance solution-processed violet-blue fluorophores.

中文翻译：

溶液处理的二芳基芴衍生物，用于紫蓝色放大的自发发射和电致发光

具有侧4-（己氧基咔唑）-9,9-二苯基- 9一系列溶液处理的基于二芳基的材料的ħ芴（MC ₆ CZ）或4-（辛氧基）-9,9-二苯基- 9 ħ -芴（MC ₈）合成并系统研究了以）为核心并封端有不同电荷传输部分的化合物，例如苯基咔唑（NPC）或三苯胺（TPA）。这些材料在稀释的溶液和薄膜中显示出从紫蓝色到深蓝色的明亮荧光发射，而没有分子聚集。此外，这些材料还显示出突出的优点，包括优异的溶液加工性和无定形特性。因此，预计溶液处理的有机发光二极管（OLED）的EL光谱类似于相应的PL光谱，表明分子内的光物理行为。作为发射层的MC ₆ Cz-9-NPC呈现出最高的最大亮度，约为1560 cd m ^-2ASE的结果表明，含MC ₈核的化合物的阈值较低，可与传统的共轭或星形聚合物相比，阈值较低，而传统的共轭或星形聚合物的光阈值可能为光增益介质。我们提出了一种新颖的分子设计策略，以构建高性能溶液处理的紫蓝荧光团。

更新日期：2017-09-18

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