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Thermal Fluctuation-Induced Electricity Generation across a Non-Ideal Diode

We report experimentally that the electricity is generated from ambient thermal fluctuations across a non-ideal diode consisted of a silicon tip and an aluminum surface. The output is tuned by the contact force which modulates Schottky barrier heights as well as rectifying ratios of the diodes. The interaction regime between the silicon and the aluminum locates at the quantum-classical boundary where thermal fluctuations are appreciable, and the rectification of thermal fluctuations leads to the electricity generation. This finding offers an innovative approach to environmental energy harvesting.