Highly Deformable and See‐Through Polymer Light‐Emitting Diodes with All‐Conducting‐Polymer Electrodes

• DOI: 10.1002/adma.201703437
• Publication Date: 2017-12-06T06:52:42Z
• Authors: Seyoung Kee; Nara Kim; Byoungwook Park; Bong Seong Kim; Soonil Hong; Jong‐Hoon Lee; Soyeong Jeong; Ahryun Kim; Soo‐Young Jang; Kwanghee Lee
• Keywords: Opacity; Visible spectrum

Despite the high expectation of deformable and see-through displays for future ubiquitous society, current light-emitting diodes (LEDs) fail to meet desired mechanical optical properties, mainly because fragile transparent conducting oxides opaque metal electrodes. Here, by introducing a highly conductive nanofibrillated polymer (CP) as both anode cathode, ultraflexible LEDs (PLEDs) are demonstrated. The CP-based PLEDs exhibit outstanding dual-side light-outcoupling performance with transmittance 75% at wavelength 550 nm an excellent durability 9% bending strain. Moreover, fabricated on 4 µm thick plastic foils all-solution processing have extremely foldable functionality. This approach is expected open new avenue developing wearable attachable displays.