Beijing Advanced Innovation Center for Soft Matter Science and Engineering, State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
Key Laboratory of Luminescence and Optical Information, Ministry of Education, School of Physical Science and Engineering, Beijing JiaoTong University, Beijing, 100044, China.
Angew Chem Int Ed Engl. 2023 May 22;62(22):e202301651. doi: 10.1002/anie.202301651. Epub 2023 Apr 21.
Two kinds of triphenylamine-derived solid-state emissive carbon dots (CDs) with orange and yellow color are facilely synthesized through solvothermal treatment, taking advantage of the nonplanar structure and good carrier mobility of triphenylamine unit. Theoretical calculations show that the triphenylamine structure could greatly inhibit the direct π-π stacking of aromatic skeletons and enhance the fluorescence properties of CDs in aggregation state. By adopting the CDs as single emissive layer, high-performance orange-color and green-color electroluminescent light-emitting diodes (LEDs) are successfully fabricated, with maximum brightness of 9450/4236 cd m , high current efficiency of 1.57/2.34 cd A and low turn-on voltage of 3.1/3.6 eV are respectively achieved. Significantly, white-color LED device is further prepared. This work provides a universal platform for the construction of novel solid-state emissive CDs with significant applications in photoelectric device.
两种基于三苯胺的固态荧光碳点（CDs）通过溶剂热法合成，具有橙色和黄色两种颜色，该方法利用了三苯胺单元的非平面结构和良好的载流子迁移率。理论计算表明，三苯胺结构可以极大地抑制芳香骨架的直接π-π堆积，增强 CDs 在聚集态下的荧光性质。通过采用 CDs 作为单一发射层，成功制备了高性能的橙色和绿色电致发光二极管（LED），其最大亮度分别为 9450/4236 cd m ，电流效率分别为 1.57/2.34 cd A ，开启电压分别为 3.1/3.6 eV。值得注意的是，进一步制备了白色 LED 器件。这项工作为构建具有显著光电应用的新型固态荧光 CDs 提供了一个通用平台。
