Fig. 3: Schematic illustration of the fabrication procedure of the annular TE devices.
From: Annular flexible thermoelectric devices with integrated-module architecture

a with integrated-module architecture by connecting in series with eight independent modules, each containing three p-n couples of single-layer films with a dimension of 2 × 2 cm2, b with single-layer film structure by alternatively connecting in series using four pairs of the p- and n-type films with a dimension of 2 × 2 cm2. c, d Photographs showing the output voltages of the annular TE devices at ΔT = 18 ± 2 K for c the integrated-module architecture or d the single-layer film structure.