Inkjet Printing Matrix Perovskite Quantum Dot Light-Emitting Devices

作者：Li, Danyang; Wang, Junjie; Li, Miaozi; Xie, Gancheng; Guo, Biao; Mu, Lan; Li, Haiyang; Wang, Jian; Yip, Hin-Lap; Peng, Junbiao^*

来源：Advanced Materials Technologies, 2020, 5(6): 2000099.

DOI：10.1002/admt.202000099

• inkjet printing
• light-emitting diodes
• perovskite quantum dots

Perovskite light emitting devices have been expected to be utilized in the field of displays. In this work, a stable FA(0.3)Cs(0.7)PbBr(3) perovskite quantum dot ink with optimized octane:dodecane cosolvent is obtained by introducing a trace amount of long-chain ligand of oleylamine (OAm) during the quantum dot purification process. A green electroluminescent matrix device with 120 pixels per inch (PPI) is realized from the ink by using an inkjet printing technique, exhibiting a luminance of 1233 cd m(-2), a peak current efficiency of 10.3 cd A(-1), and an external quantum efficiency of 2.8%. The results may suggest a possibility of making perovskite quantum dot displays by using the inkjet printing technique.