A flexible photo-thermoelectric nanogenerator based on MoS2/PU photothermal layer for infrared light harvesting

Design, Performance, and Application of Thermoelectric Nanogenerators

“…c 1 –c 4 ) Working and the structure diagram of the flexible TEG, under IR light illumination. Reproduced with permission . Copyright 2018, Wiley‐VCH.…”

“…Moreover, TEGs can also convert light‐induced heat energy to electrical energy. Lin and coworkers designed and fabricated a flexible TEG based on Te nanowires/PEDOT:PSS composites (TE layer). One of two silver electrodes is covered with MoS 2 nanoclusters/polyurethane (PU) composite film (photothermal layer).…”

“…Tellurium (Te) is a silver‐white metalloid and found as hexagonal nonmetallic crystals with low thermal conductivity, high power factor, and excellent TE properties . Lin, Pei, and coworkers found that Te nanowires and nanosheets exhibit excellent TE properties owing to low thermal conductivity and high power factor induced by inherently nested valence bands in Te. By controlling different reaction times of the hydrothermal process, Te nanomaterials with different morphologies can be synthesized simply and efficiently, as displayed in Figure f 1 –f 5 , which expands the improvement space of Te nanomaterials and develops a pure electronic effect for discovering TE materials with high performances.…”

“…f 1 –f 5 ) SEM images of Te nanomaterials with different morphologies. Reproduced with permission . Copyright 2018, Wiley‐VCH.…”

“…The Seebeck coefficient and power factor of TEGs are about −350 µV K −1 and 3.2 × 10 4 W m −1 K −2 , respectively. This kind of TEGs exhibit excellent performance stability by measuring another eight TEGs, which can develop their potential to work as a self‐powered temperature sensor with a reset time of about 9 s. Based on Te‐PEDOT nanocomposite as excellent TE material and PU/MoS 2 composite films as photothermal layer, as illustrated in Figure b 1 , the flexible TEG can effectively convert light energy into heat energy. When an IR laser (λ = 808 nm) with output power density of 2.625 W cm −2 illuminates the surface of photothermal layer for about 30 s, the temperature of photothermal layer is stable at about 340 K when the content of MoS 2 is 3%.…”