Limiting efficiencies of solar energy conversion and photo-detection via internal emission of hot electrons and hot holes in gold
Author(s)Hsu, Wei-Chun; Liao, Bolin; Boriskina, Svetlana V; Zhou, Jiawei; Chen, Gang
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We evaluate the limiting efficiency of full and partial solar spectrum harvesting via the process of internal photoemission in Au-semiconductor Schottky junctions. Our results based on the ab initio calculations of the electron density of states (e-DOS) reveal that the limiting efficiency of the full-spectrum Au converter based on hot electron injection is below 4%. This value is even lower than previously established limit based on the parabolic approximation of the Au electron energy bands. However, we predict limiting efficiency exceeding 10% for the hot holes collection through the Schottky junction between Au and p-type semiconductor. Furthermore, we demonstrate that such converters have more potential if used as a part of the hybrid system for harvesting high- and low-energy photons of the solar spectrum.
DepartmentMassachusetts Institute of Technology. Department of Mechanical Engineering
Proceedings of SPIE--the Society of Photo-Optical Instrumentation Engineers
Boriskina, Svetlana V., Jiawei Zhou, Wei-Chun Hsu, Bolin Liao, and Gang Chen. “Limiting Efficiencies of Solar Energy Conversion and Photo-Detection via Internal Emission of Hot Electrons and Hot Holes in Gold.” Edited by Marija Strojnik Scholl and Gonzalo Páez. Infrared Remote Sensing and Instrumentation XXIII (September 1, 2015). © 2015 Society of Photo-Optical Instrumentation Engineers (SPIE)
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