Silver-Nanowire-Embedded Transparent Metal-Oxide Heterojunction Schottky Photodetector

We report a self-biased and transparent Cu4O3/TiO2 heterojunction for ultraviolet photodetection. The dynamic photoresponse improved 8.5 X 10(4)% by adding silver nanowires (AgNWs) Schottky contact and maintaining 39% transparency. The current density voltage characteristics revealed a strong interfacial electric field, responsible for zero-bias operation. In addition, the dynamic photoresponse measurement endorsed the effective holes collection by embedded-AgNWs network, leading to fast rise and fall time of 0.439 and 0.423 ms, respectively. Similarly, a drastic improvement in responsivity and detectivity of 187.5 mAW(-1) and of 5.13 X 10(9) Jones, is observed, respectively. The AgNWs employed as contact electrode can ensure high-performance for transparent and flexible optoelectronic applications.The authors acknowledge the financial support the Basic Science Research Program through the National Research Foundation (NRF) of Korea by the Ministry of Education (NRF-2015R1D1A1A01059165) and Korea Institute of Energy Technology Evaluation and Planning (KETEP) and the Ministry of Trade, Industry & Energy (MOTIE) of the Republic of Korea (KETEP-20168520011370). Prof. J.-H. Lee has special appreciation of the Human Rescources Development program (KETEP-20154030200680). Authors acknowledge the helpful discussion and useful informaiton provided by Prof. Ralf B. WEHRSPOHN, Fraunhofer IMW Halle, Germany. Sohail Abbas and Mohit Kumar are equally contributed to this work