Nano-honeycomb structured transparent electrode for enhanced light extraction from organic light-emitting diodes

作者：Shi, Xiao-Bo; Qian, Min; Wang, Zhao-Kui^*; Liao, Liang-Sheng

来源：Applied Physics Letters, 2015, 106(22): 223301.

DOI：10.1063/1.4922040

• EXTERNAL QUANTUM EFFICIENCY
• MICROLENS ARRAYS
• PHOSPHORESCENT OLEDS
• DEVICES
• 30-PERCENT
• DERIVATIVES
• STABILITY
• OXIDE

A universal nano-sphere lithography method has been developed to fabricate nano-structured transparent electrode, such as indium tin oxide (ITO), for light extraction from organic light-emitting diodes (OLEDs). Perforated SiO2 film made from a monolayer colloidal crystal of polystyrene spheres and tetraethyl orthosilicate sol-gel is used as a template. Ordered nano-honeycomb pits on the ITO electrode surface are obtained by chemical etching. The proposed method can be utilized to form large-area nano-structured ITO electrode. More than two folds' enhancement in both current efficiency and power efficiency has been achieved in a red phosphorescent OLED which was fabricated on the nano-structured ITO substrate.

• 出版日期2015-6-1
• 单位苏州大学