Abstract
Low-dimensional transition metal chalcogenides (TMDCs) have gained interest as potential energy harvesters. The structural change during dimensional reduction paves the way for better charge repositories compared to their bulk counterparts. Thin flakes of manganese di-telluride (MnTe2) were used to devise a triboelectric nanogenerator (TENG), and the device was capable of producing a maximum power density of 123 mW cm-2, with a sensitivity of ∼ 408 mV kPa-1. The device also has a high surface potential of 1.02 V and surface charge density (SCD) of 2.204 mC m-2, respectively. The effect of uniaxial and biaxial strains on the two-dimensional (2D) TENG was studied using in-situ Raman spectroscopy. The enhanced outputs in the 2D device were attributed to the Te - di vacancies created during exfoliation in the flakes (DFT calculations). The potential application of the fabricated device is to be used as an energy harvester from air-conditioning (AC) ducts.
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