Fabrication of Solution-Processed Lithium-Doped Nickel Oxide in Perovskite Light Emitting Diodes with Improving the thin film quality by MA treatment Method

• Main Authors: Yun-YuHsiao, 蕭允毓
• Other Authors: Chiu Gao
• Format: Others
• Language: zh-TW
• Published: 2017
• Online Access: http://ndltd.ncl.edu.tw/handle/gtktc9

碩士 === 國立成功大學 === 航空太空工程學系 === 105 === The issue of this research is to improved the performance of perovskite light-emitting didoes (PeLED) based on Lithium-doped nickel oxide. The cell’s performance have a brightness over 78000cd/m2 and the luminous efficiency(LE) over 12cd/A, which have four times improved from the original sample. Firstly, the Lithium was chose as the doped metal, because it can decrease the resistance of the NiOx, and have more better LUMO to confine the charge carriers in the CH3NH3PbBr3 layer, so in this work we doped the Lithium into NiOx by solution processes. But the film quality of perovskite film shows the traps and holes, and the passivation of grain boundary, all of these might hinder the brightness and the efficiency of PeLED. To dissolved the problem ,we use the methylamine(MA) treatment to enhance the perovskite film quality, which significantly improves the crystallinity and the photoluminescence of the perovskite film. It also can modify the holes and traps caused by the Lithium doped NiOx. A Lithium-doped NiOx perovskite LED with the figuration of ITO/Lithium-doped nickel oxide/MA treated CH3NH3PbBr3 /TPBi/LiF /Al, display a max brightness of 73325cd/m2 at 7.5V and luminous efficiency of 12.3cd/A at 7.5V.