Two-dimensional cobalt telluride as a piezo-tribogenerator
Solomon Demiss Negedu, Raphael M. Tromer, Chinmayee Chowde Gowda, Cristiano F. Woellner, Olu Emmanuel Femi, Ajit K. Roy, Prafull Pandey, Douglas S. Galvão, Pulickel M. Ajayan, Partha Kumbhakar, Chandra Sekhar Tiwary
Abstract
). The piezo-triboelectric nanogenerator (PTNG) produced an open-circuit voltage of ∼5 V under 1 N force and the effect of temperature in the range of 305-363 K shows a four-fold energy conversion efficiency improvement. The 2D piezo-tribogenerator shows excellent characteristics with a maximum voltage of ∼10 V, fast response time, and high responsivity. Density functional theory was used to gain further insights and validation of the experimental results. Our results could lead to energy harvesting approaches using 2D materials from various thermal sources and dissipating waste heat from electronic devices.