Kwak, Geonho Jeong, Yoo-Seok Kim, Sun-Woo Kim, Jin-Kyeom Choi, Jihyeok Song, Kyung Guen Kim, Hee Jun Choi, Won Jun Yang, Ya Song, Hyun-Cheol Baik, Jeong Min Yu, Hak Ki 2024-01-19T09:32:02Z 2024-01-19T09:32:02Z 2023-04-20 2023-06 2211-2855 https://pubs.kist.re.kr/handle/201004/113708 In this paper, a facile strategy for a hybrid photothermal structure that can efficiently manage solar heat is reported. The hybrid photothermal structure consists of a Cr/MgF2 multilayer structure absorber and a poly(methyl methacrylate) (PMMA)-graphene heat reservoir that prevents the absorbed heat from being lost through radiation or convection. It exhibits a quite high light absorption of approximately 80% over a wavelength range of 0.5-2.5 mu m. The thermal conductivity and thermal diffusivity are improved by about 47% according to the addition of graphene to PMMA, effectively transferring the stored heat to a place where it can be used efficiently. When the hybrid photothermal structure was applied to the hot zone of a thermoelectric generator, the output voltage is improved by 2.74 times compared to the device with only the light absorber. In addition, the difference between the high and low temperatures reached up to approximately 27 K. English Elsevier BV Hybrid photothermal structure based on Cr-MgF2 solar absorber/ PMMA-graphene heat reservoir for enhanced thermoelectric power generation Article 10.1016/j.nanoen.2023.108352 1 Nano Energy, v.110 Nano Energy 110 N scie scopus 000960386800001 2-s2.0-85151545661 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article WATER PERFORMANCE PLASMONICS MULTISCALE DISPERSION CONVERSION STABILITY EFFICIENT COATINGS Photothermal properties Light absorber Heat reservoir Thermoelectric generator Low emissivity