Extended Data Fig. 1: Au BSR and air-bridge cell structures and efficiency estimation.
From: Near-perfect photon utilization in an air-bridge thermophotovoltaic cell
a, Schematic of a conventional thin-film TPV cell with Au reflector. The top and bottom InGaAs contact layers are left unetched in the Au BSR cell to reduce the contact resistance. b, Schematic of a thin-film TPV cell with air-bridge reflector. The air cavity thickness in the air-bridge TPV cell is 600 nm. OOB reflectance is affected by the air cavity thickness and the thickness optimization is provided in Extended Data Table 1. c, Hypothetical Au BSR cell structure with no top and bottom InGaAs contact layers. d, Simulated PCE of the hypothetical Au BSR cell in c and the air-bridge cell in b.
