AMOLED panel driven by OTFTs on polyethylene fabric substrate

作者：Kim Jae Seon; Song Chung Kun^*

来源：Organic Electronics, 2016, 30: 45-51.

DOI：10.1016/j.orgel.2015.12.007

• AMOLED
• Fabric substrate
• OTFT
• OLED
• Electronic textile

In this study, AMOLED display panel was fabricated on polyethylene (PET) fabric substrate. By considering flexibility of the PET fabric, organic thin film transistors (OTFTs), which used TIPS-pentacene as the active layer material, were adopted as the driving devices for the OLEDs. A standard pixel circuit was employed using two OTFTs and one capacitor and one OLED. The panel specifications were as follows; a pixel pitch of 1.5 +/- 1.5 mm, a resolution of 32 +/- 32, an aperture ratio of 22%, and a diagonal length of 2.7 inches. The large surface roughness of the PET fabric could be reduced down to 0.3 mu m from the initial roughness of 10 mu m by coating polyurethane and photo-acrylic with a two-step process. On the smoothened fabric, the OTFTs and OLEDs were integrated into the pixel array through the key processes, the self-patterning of the gate dielectric of the OTFTs and the patterning of the TIPS-pentacene layer. The mobility of two OTFTs was 0.23 and 0.34 cm(2)/V.sec in the pixel array, respectively, and the luminance of the OLED was 64,459 cd/m(2). The AMOLED panel successfully operated to vary the luminance of each pixel according to the applied voltages.

• 出版日期2016-3