A method for enhancing the light out-coupling efficiency of organic light-emitting diodes (OLEDs) by incorporating microlens arrays (MLAs) is demonstrated. MLAs made of prepolymer NOA65 were fabricated on a substrate prepatterned by the microcontact printing of hydrophobic self-assembled monolayers (SAMs). Owing to the hydrophobic effect, the lens material was self-organized on the hydrophilic regions. After assembling the MLA onto an OLED, the optical measurement showed that the light out-coupling efficiency of the OLED with MLAs is increased without any apparent color shift.

No abstract

One method to enhance the light out‐coupling efficiency of organic light emitting diodes (OLEDs) by incorporating microlens arrays (MLAs) is demonstrated. The MLAs made of prepolymer NOA65 were fabricated on the substrate pre‐patterned by microcontact printing of hydrophobic self‐assembled monolayers (SAMs). Due to the hydrophobic effect, the lens material was self‐organized on the hydrophilic regions. After assembling the MLA onto the OLED, the optical measurement showed that the light out‐coupling efficiency of an OLED with MLAs is improved without any apparent color‐shift.