Tri-Band Regulation and Split-Type Smart Photovoltaic Windows for Thermal Modulation of Energy-Saving Buildings in All-SeasonOA
Energy-saving buildings(ESBs)are an emerging green technology that can significantly reduce building-associated cooling and heating energy consumption,catering to the desire for carbon neutrality and sustainable development of society.Smart photovoltaic windows(SPWs)offer a promising platform for designing ESBs because they present the capability to regulate and harness solar energy.With frequent outbreaks of extreme weather all over the world,the achievement of exceptional energy-saving effect under different weather conditions is an inevitable trend for the development of ESBs but is hardly achieved via existing SPWs.Here,we substantially reduce the driving voltage of polymerdispersed liquid crystals(PDLCs)by 28.1%via molecular engineering while maintaining their high solar transmittance(T_(sol)=83.8%,transparent state)and solar modulating ability(ΔT_(sol)=80.5%).By the assembly of perovskite solar cell and a broadband thermal-managing unit encompassing the electrical-responsive PDLCs,transparent high-emissivity SiO_(2) passive radiation-cooling,and Ag low-emissivity layers possesses,we present a tri-band regulation and split-type SPW possessing superb energy-saving effect in all-season.The perovskite solar cell can produce the electric power to stimulate the electrical-responsive behavior of the PDLCs,endowing the SPWs zero-energy input solar energy regulating characteristic,and compensate the daily energy consumption needed for ESBs.Moreover,the scalable manufacturing technology holds a great potential for the real-world applications.
Qian Wang;Zongxu Na;Jianfei Gao;Li Yu;Yuanwei Chen;Peng Gao;Yong Ding;Songyuan Dai;Mohammad Khaja Nazeeruddin;Huai Yang
Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of ChinaInstitute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of ChinaInstitute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of ChinaState Key Laboratory of Green and Efficient Development of Phosphorus Resources,Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,No.206 Guanggu 1 Road,Wuhan 430205,People’s Republic of ChinaInstitute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,People’s Republic of ChinaFujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,People’s Republic of ChinaCollege of Renewable Energy,Hohai University,Changzhou 213000,People’s Republic of ChinaBeijing Key Laboratory of Novel Thin-Film Solar Cells,School of New Energy,North China Electric Power University(NCEPU),Beijing 102206,People’s Republic of ChinaInstitute of Chemical Sciences and Engineering,Ecole Polytechnique Federale de Lausanne(EPFL),CH-1015 Lausanne,SwitzerlandSchool of Materials Science and Engineering,Peking University,Beijing 100871,People’s Republic of China
建筑与水利
Smart photovoltaic windowsPolymer-dispersed liquid crystalsPassive radiative coolingTri-band regulationEnergy-saving buildings
《Nano-Micro Letters》 2026 (4)
P.651-662,12
supported by Natural Science Foundation of China(Grant No.52372076,52073081,52203322,5252200843)Ministry of Science and Technology of the People’s Republic of China(2023YFB3812800)Fundamental Research Funds for the Central Universities(FRF-TP-25-073)。
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