Simple Rectangular Gratings as a Near-Field "Anti-Reflection" Pattern for GaSb TPV Cells.

ABSTRACT: We show theoretically that 2D rectangular gratings on the surface of GaSb can serve as an "anti-reflection" pattern for nano-gap thermophotovoltaic (TPV) devices, which significantly enhances near-field radiative flux from the emitter to a GaSb cell, thus improving output power and conversion efficiency. The system in this study is a 200-nm gap TPV power generation system with a planar infrared plasmonic emitter and GaSb cell. Rigorous coupled-wave analysis is used to calculate the spectral near-field radiative flux involving periodic structures. The simulation shows that when coupled with a near-infrared plasmonic bulk emitter, adding gratings on the GaSb cell surface results in strong spectral enhancement above the cell's bandgap and suppression for low-energy photon transmission, an eff

SUBMITTER: Yu H 

PROVIDER: S-EPMC5430919 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature