Journal Article flexible electronics printed electronics DFT Printed organic electronics Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. density functionals dispersion flexible medical sensors kinetics low-work-function electrodes organic electrochemical transistors organic electronics organic photodetectors organic photodiodes organic semiconductor blends organic thin film transistors solution processed thin films solvation threshold voltage wearable health monitoring wearable sensors