Solution-Processed Organic Thin-Film Transistor Array for Active-Matrix Organic Light-Emitting Diode

Abstract

We developed a 3-in. organic thin-film transistor (OTFT) array with an ink-jetted organic semiconductor. All layers except electrodes were fabricated by solution processes. The OTFT performed well without hysteresis, and the field-effect mobility in the saturation region was 0.45 cm2 V-1 s-1, the threshold voltage was 3.3 V, and the on/off current ratio was more than 106. We demonstrated a 3-in. active-matrix organic light-emitting diode (AMOLED) display driven by the OTFT array. The display could provide clear moving images. The peak luminance of the display was 170 cd/m2.

Ultraviolet/ozone-assisted thermal treatment of low-temperature-processed printable ZnO field-effect transistors for flexible displays

“…Moreover, it is possible to manufacture AMOLEDs by printing methods with low-temperature and low-cost processes on a plastic substrate, and research on flexible organic light-emitting diodes (OLEDs) has also become popular. [7][8][9] Despite all the merits of AMOLED displays mentioned above, the elements of driving transistor (Dr-Tr), switching transistor (Sw-Tr), and storage capacitor to be constructed for each pixel of an AMOLED display, which will limit the device aperture ratio. 7) Figure 1 shows a conceptual diagram of an active matrix display.…”

“…[7][8][9] Despite all the merits of AMOLED displays mentioned above, the elements of driving transistor (Dr-Tr), switching transistor (Sw-Tr), and storage capacitor to be constructed for each pixel of an AMOLED display, which will limit the device aperture ratio. 7) Figure 1 shows a conceptual diagram of an active matrix display. The area of Dr-Tr will limit the light-emitting area per pixel, where it is necessary to increase luminescence intensity, which results in a large driving current demand.…”

Effect of incident molecular temperature on the elementary processes in thin film growth of long-chain molecules during vacuum deposition

“…© 2023 The Japan Society of Applied Physics O rganic thin films are of great interest because of their potential applications, such as organic thinfilm transistors and organic light-emitting diodes in molecular electronics and optics. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] The properties of these devices are strongly affected by the crystal structure, molecular orientation, and crystal morphology in thin films. Thus, to realize these technologies, a better understanding of the mechanisms of organic thin-film growth is required.…”