Electrical characterization of new electrochromic devices

Electrochromic devices change their color and optical properties with applied voltage. A new symmetrical electrochromic configuration was constructed in previous works, where PEDOT acted as electrochromic layer or as counter electrode layer, depending on the polarity of the applied voltage. Devices of around 500mm2 and switching voltages from 0,5V to 2V are used in this work. Measured electrochemical impedance is fitted to an equivalent circuit based on a Randles cell, with Warburg impedance simulating ionic diffusion at low frequencies. Voltage dependence is analyzed for the first time in this kind of devices. Results show homogeneity problems in the contact layers, not seen in normal operation, and the voltage dependence on some construction parameters. This will be used to improve the devices construction, but improvements in the equivalent circuit should also be made. The proposed equivalent circuit is not valid after the redox reaction, from 1.5 to 2V.

Digitech, remix and design research for course /program-wide thinking and enhancement

This paper describes the initial stage of an exploratory investigation in which the authors aim to build course/program-wide thinking into a process aimed at supporting, documenting and sharing technology-rich practices, innovative teaching and active student learning. The investigation uses a remix lens, in an attempt to creatively consider the manipulation of resources and approaches for reuse, while supporting consistency across subjects/units within a course. The authors are working within Deakin University’s Course Enhancement Process, which is a major university-wide initiative that includes a framework of collaborative teams comprising academic and resourcing specialists working with faculty academic leaders. The Course Enhancement Process is flexible in its implementation and the authors aim to use the process to build a sustainable course-wide sharing and thinking approach within the Business and Law faculty at Deakin University, Australia.