Highly Integrable Organic Optocouplers on a Patterned Double-Side Indium Tin Oxide Substrate With High Isolation Voltage

Optocoupler is fabricated by applying two separated devices as its two important composition units, the photoemitter (input) and photosensor (output), and then combining them together. It is difficult to realize precise pixel-to-pixel alignment when the active area becomes smaller and smaller, which is a limitation in the microelectronics applications. Based on a double-side indium tin oxide (ITO) substrate, a highly integrable organic optocoupler (OOC) was developed. It can reduce the limitations mentioned above of traditional optocouplers. The current transfer ratio can be enhanced to the maximum 1.87% by changing the light-emitting area. In addition, the isolation voltage can also be improved to over 3000 V by the patterning lithography treatment to ITO substrate. This sort of OOC has a promising application in the micromation of electronic devices and can be also used in low-voltage-control circuits.