High-Performance Photocoupler Based on Perovskite Light Emitting Diode and Photodetector

摘要

Photocoupler is a kind of semiconductor optoelectronic device that integrates light-emitting device (LED) and photodetector. It has found wide application in various fields because of its capability to transmit the electrical signal through the conversion of the electricity-light electricity. Herein, we report the fabrication of a new photocoupler by simply integrating perovskite quantum dots LED and perovskite photodetector on a glass substrate. The as-fabricated photocoupler showed outstanding characteristics with high current transfer ratio (CTR) of 3.35%, which is highly competitive in comparison with other materials based devices. Furthermore, the perovskite photocoupler had a fast response speed of 8 mu s/8.26 mu s. By further adding an amplification circuit, the CTR could be enhanced by around SO times to 172.6%. These results indicate that the present perovskite-based photocouplers may find potential application in future integrated circuit and optoelectronic system.