High-brightness perovskite quantum dot light-emitting devices using inkjet printing

被引:31
作者
Zheng, Chunbo [1 ]
Zheng, Xin [1 ]
Feng, Chen [1 ]
Ju, Songman [1 ]
Xu, Zhongwei [1 ]
Ye, Yuliang [1 ]
Guo, Tailiang [1 ]
Li, Fushan [1 ]
机构
[1] Fuzhou Univ, Inst Optoelect Technol, Fuzhou 350002, Peoples R China
基金
中国国家自然科学基金;
关键词
Perovskite; PeLEDs; Inkjet printing; Coffee ring; DIODES; EFFICIENT;
D O I
10.1016/j.orgel.2021.106168
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The performance of perovskite quantum dot light-emitting diodes (PeQLEDs) has been rapidly enhanced recently, but the devices are still stuck in the stage of using small-scale solution processes, such as spin-coating. In this work, we report the realization of high performance PeQLEDs by using inkjet printing technique. We demonstrate the preparation of a printable perovskite quantum dot ink by using a hybrid solvent consisting of high boiling solvent dodecane and low boiling solvent n-octane. A universal strategy for eliminating coffee rings during inkjet printing of perovskite inks is developed based on the modulation of ink formulation, and the stacking model of perovskite quantum dot in a pixel pit structure is proposed. The inkjet-printed PeLEDs exhibit a low turn-on voltage of 2.7 V, a brightness of 10992 cd/m2 at 6.6 V and a maximum current efficiency of 8.67 cd/ A, which is by far the highest value reported for inkjet-printed PeLEDs. The results pave a way for future realization of high performance pixelated PeLED displays with inkjet printing technique.
引用
收藏
页数:6
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