Fig. 1: The bipolar thermopower of the same PNP. | Nature Communications

Fig. 1: The bipolar thermopower of the same PNP.

From: Reversible bipolar thermopower of ionic thermoelectric polymer composite for cyclic energy generation

Fig. 1

a The illustration of the thermopower test using Cu electrodes and aligned CNT (a-CNT) electrodes. b The curves of the generated thermoelectric voltage as a function of time for the Cu|PNP|Cu (blue line) and a-CNT|PNP|a-CNT (red line) systems under several alternating heating on/off cycles. c The schematic illustration of the thermodiffusion process of the p-type Cu|PNP|Cu and n-type a-CNT|PNP|a-CNT systems under a temperature gradient. d The fitting curves of the produced thermoelectric voltage difference corresponding to related temperature differences and e the values of the measured thermopowers of the E|PNP|E systems (E = Cu, Pt, Au, a-CNT, MWCNT, and SWCNT), which error bars were calculated using the standard deviation of the measured thermopower data.

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