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- W4323662656 abstract "Photon-enhanced thermionic emission (PETE) converter is a solid-state heat engine, in which hot electrons emit from a p-type semiconductor cathode to an anode across a vacuum gap. Photon-enhanced mechanism reflects in reducing the electron emission barrier by photo-induced quasi-Fermi level splitting. High photon-enhancement mode requires a thin cathode thickness to reduce the recombination of excited-electron during diffusion. Whereas, thin cathode causes huge photon penetration loss. In this work, we propose an original concept of hybrid photon-enhanced thermionic emission converter and photovoltaic (PETE-PV) solar cell. The penetrating solar photons are utilized by photovoltaic sub-devices to yield additional output power. The operating characteristics and superiority of a four-terminal PETE-PV solar cell were demonstrated by simulation. Results show that the solar cell gains a 4–8% point of power conversion efficiency boost thanks to the photovoltaic sub-device. In addition, we developed a PETE prototype with light impinging through a transparent anode (i.e., indium-tin-oxide film) to a cathode surface. Experimental results demonstrate that the cathode saturation current under illumination is ∼300-fold larger than that of pure thermionic emission mode, and the cathode work function is reduced by 0.6 eV. This study lays a solid foundation for further development and application of PETE-PV solar cells." @default.
- W4323662656 created "2023-03-10" @default.
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- W4323662656 date "2023-06-01" @default.
- W4323662656 modified "2023-10-11" @default.
- W4323662656 title "Hybrid photon-enhanced thermionic emission and photovoltaic converter with concentrated solar power" @default.
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- W4323662656 doi "https://doi.org/10.1016/j.solmat.2023.112279" @default.
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