Prof. Jidong LI from Nanjing University of Aeronautics and Astronautics presented a lecture entitled ‘Kinetic Photovoltage from Moving Boundaries of Electrical Double Layer’ at the Faculty of Science and Technology on 18 April 2024.

At the seminar, Prof. Jidong LI, shared his latest research results in the field of the Kinetic Photovoltage Effect (KPE), which is a novel type of energy harvesting technique based on the moving boundaries of electrical double layer at solid–liquid interface.

① The induced electricity of the KPE is attributed to interfacial charging and discharging at the front and rear edges of the moving region, respectively. Prof. Li refined this model by introducing the model of charge packets.
② Prof. Li reported a transistor-inspired gate modulation of KPE by applying a bias at the semiconductor-water interface. Passive gate modulation of the KPE could be achieved by introducing a counter electrode with desired materials. The basic principle is that the band bending intensity in the vicinity of the semiconductor surface can be varied by the gate voltage.
③ Additionally, device forms based on this principle have been developed in the all-solid-state and gaseous state (utilizing oxygen). The study provides novel design concepts for optoelectronic devices inspired by field effect transistors.