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SUMMARY:Demonstrating the Thermoradiative Diode: Generating Electrical Pow
 er Through Radiative Emission - Prof. N. J. Ekins-Daukes\, University of N
 ew South Wales
DTSTART:20230707T140000Z
DTEND:20230707T150000Z
UID:TALK202849@talks.cam.ac.uk
CONTACT:89851
DESCRIPTION:Thermoradiative power generation is achieved through the emiss
 ion of light from a warm ambient into a cold surroundings representing a t
 hermodynamically symmetric counterpart to photovoltaic solar power generat
 ion. The thermoradiative diode provides a semiconductor implementation of 
 this process whereby radiative emission from a warm diode into a cold envi
 ronment expels more entropy than supplied by the flow of heat to the diod
 e hence permitting work to be performed. Under these conditions a reverse 
 bias spontaneously forms across the diode allowing an electrical current t
 o flow thereby delivering electrical power. We report the full IV charact
 eristics from a 0.3eV HgCdTe diode was held at 20.5C and exposed to a radi
 ant surface of different temperatures. Thermoradiative power is generated 
 when the diode faces a cold (<20.5C surface) delivering a positive photocu
 rrent and negative voltage. In the radiative limit\, where all parasitic p
 rocesses are eliminated\, a thermoradiative diode exposed to the cold nigh
 t sky could deliver electrical power densities of the order of tens of W/m
  2\, offering the tantalizing prospect of generating useful quantities of 
 electrical power. The linear behaviour of our IV curves is consistent with
  Auger mediated generation and recombination processes that reduce the pow
 er density for currently available commercial diodes to mW/cm 2.\n\nhttps:
 //pubs.acs.org/doi/abs/10.1021/acsphotonics.2c00223
LOCATION:Maxwell Centre\, Rayleigh Seminar Room
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