Flexible smart photovoltaic foil for energy generation and conservation in buildings

Yun MENG, Xin LI, Shancheng WANG, Chooi Kim LAU, Hebing HU, Yujie KE, Gang TAN*, Junyou YANG*, Yi LONG*

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

26 Citations (Scopus)

Abstract

Building-integrated solar cells not only generate electricity but also impact the envelope thermal characteristics, thus changing the micro-climate of buildings. Therefore, the collective effects of energy conservation and generation on buildings should be considered in one design. In this work, a smart photovoltaic window foil with near-infrared (NIR) modulation and low long-wavelength IR emissivity has been fabricated by combining organic perovskite and inorganic tungsten doped vanadium dioxide nanoparticles (W-VO2 NPs). The W-VO2 offers solar modulation and promotes extraction and transport of photogenerated charges, giving peak power conversion efficiency of 15.4% at 25 °C and 16.1% at 45 °C and average visible transmission of 25.5%, comparable to the best reported semitransparent perovskite solar cell with an additional favorable NIR modulation of 10.7%. This new strategy to integrate energy-saving functionality into photovoltaic foil initiates a new design rule for smart window development.
Original languageEnglish
Article number106632
JournalNano Energy
Volume91
Early online date18 Oct 2021
DOIs
Publication statusPublished - Jan 2022
Externally publishedYes

Bibliographical note

Y. M, X. L and S. W. contributed equally to this work. This work was supported by National Research Foundation , Prime Minister’s Office, Singapore under its Campus for Research Excellence and Technological Enterprise (CREATE) program and Singapore Ministry of Education (MOE) Academic Research Fund Tier 1 RG103/19 and RG86/20 . This work was co-financed by National Natural Science Foundation of China (Grant Nos. 51572098 and 51632006 ), National Basic Research Program of China (Grant No. 2013CB632500 ), Natural Science Foundation of Hubei Province (Grant No. 2015CFB432 ), Open Fund of State Key Laboratory of Advanced Techology (No. 2016-KF-5 ).

Keywords

  • Low emissivity
  • Semitransparent perovskite photovoltaic
  • Smart windows
  • Solar modulation
  • Vanadium dioxide nanoparticles

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