Micro organic light-emitting diodes fabricated through area-selective growth

Zhu J, Fontein F, Wang H, Zhong Q, Li C, Li J, Wang B, Liao L, Wang Y, Huang L, Fuchs H, Wang W, Chi L

Abstract

Developments in micro-displays have led to great interest in patterning OLEDs on the microscale. However{,} because organic molecules are fragile in adverse environments{,} patterning OLEDs on the microscale remains underdeveloped. In this work{,} the fabrication of Micro-OLEDs via the area-selective growth of hole-transporting material is reported. The active material is selectively deposited on pre-determined areas{,} and this technique is compatible with photolithography. High-resolution OLEDs with feature sizes as low as sub-micrometer and green-{,} orange-red- and deep-blue-emitting devices are demonstrated. This technique provides a promising method for the fabrication of high-resolution OLED devices over large areas.