fig 2 (IMAGE)
Caption
Figure 2: Dynamic modulation performance of IR emissivity and stability. (a) Schematic demonstration of the electrohromism devices for energy harvesting at two states (left: metal stripped for cooling energy, right: metal electrodeposited for heating mode). (b) Solar absorptance and IR emissivity spectra for EH in cooling mode (−0.7 V) and heating mode (+1 V). (c) IR emissivity spectra of the EH from the initial high emissivity state (cooling mode) to the fully electrodeposited low emissivity state (heating mode) under an applied potential of −0.7 V. (d) IR emissivity tunability range in MWIR and LWIR. (e) shows MWIR and LWIR images of EH during the metal electrodeposition process under an applied potential of −0.7 V. (f) Apparent temperature curves of EH (center and edge) in MWIR and LWIR during the metal electrodeposition and stripping process. (g and h) Apparent temperatures (g) and IR emissivity spectra (h) during the cycling life test (−0.5 V for deposition 30 s and +1 V for stripping 30 s). The center and edge apparent temperatures were both recorded. i, EH’s open-circuit stability after applying 600 s negative bias of −0.7 V. λ = 4 and 10 μm.
Credit
ACS Energy Letters
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CC BY