Reversible conductance switching characteristics in a polymer-In2O3 nanocrystals junction

A transparent polymer-based resistive switching device containing In2O3 nanocrystals (NCs) is fabricated, and its nonvolatile memory characteristics are evaluated. Very clear reversible counter-clockwise bipolar-type resistive switching phenomena are observed. Stable retention is demonstrated. An Analysis of the temperature dependence of the bistable resistance states reveals additional features, not reported in previous studies, that the observed resistance switching is due to oxygen ions drift-induced redox reactions at the polymer/In2O3 NCs interface. The RESET and SET switching times (tau RESET and tau SET), which are defined as pulse widths extrapolated by the steepest slopes in the transition region, are tau RESET similar to 550 nsec and tau SET similar to 900 nsec. The authors propose that microscopic potential modification occurring near the polymer/In2O3 NCs boundaries plays a key role in determining resistive switching properties. (C) 2014 Author(s).This work was partially supported by the National Research Foundation (NRF) of Korea grant funded by the ministry of Education (Grant Nos. 2012R1A1A2008517 and 2013-044975). EKK acknowledges to the Mid-career researcher program through the NRF grant (NRF-2013-1015824)