TY - JOUR
T1 - Enhanced spectral modulation of CsxWO3 nanocrystals through anionic doping for energy-efficient glazing
AU - Shen, Boxu
AU - Wang, Yuanhao
AU - Lu, Lin
AU - Yang, Hongxing
N1 - Funding Information:
This work was supported by the TCS project of the Hong Kong Innovation and Technology Fund (UIT/139) and Sola Green Technologies Limited. This work was also supported by the National Natural Science Foundation of China (Grant No. 61705258 ).
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2022/3
Y1 - 2022/3
N2 - Spectrally selective materials have been widely used to shield near-infrared radiation for windows in the region with a cooling-demand climate. CsxWO3 nanocrystals which exhibit strong localized surface plasmon resonance (LSPR) effect and small polaron transfer in near-infrared radiation have attracted great attention for fabricating the spectrally selective coating. The enhancement of its optical performance remains a challenge in energy-efficient windows. Herein, F-doped CsxWO3 nanocrystals were successfully prepared by a solvothermal method, which demonstrate stronger near-infrared absorption performance than CsxWO3 nanocrystals. The introduction of fluorine can enhance the free carrier density of the nanocrystals, which can lead to a higher absorption coefficient. The absorption coefficient variation of LSPR effect and small polaron transfer was explained by the variation of free carrier density and carrier mobility. When the F/W molar ratio was 0.4, the free carrier density reached 9.25 × 1014 cm-3. The spectrally selective coating prepared by F-doped CsxWO3 nanocrystals exhibited superior spectral selectivity with TVis, TNIR, Tlum, and Tsol of 67.21%, 11.85%, 72.76% and 49.01%, respectively. This substitutional doping strategy provides a promising potential to improve the spectral modulation of CsxWO3 nanocrystals for practical application of energy-saving windows.
AB - Spectrally selective materials have been widely used to shield near-infrared radiation for windows in the region with a cooling-demand climate. CsxWO3 nanocrystals which exhibit strong localized surface plasmon resonance (LSPR) effect and small polaron transfer in near-infrared radiation have attracted great attention for fabricating the spectrally selective coating. The enhancement of its optical performance remains a challenge in energy-efficient windows. Herein, F-doped CsxWO3 nanocrystals were successfully prepared by a solvothermal method, which demonstrate stronger near-infrared absorption performance than CsxWO3 nanocrystals. The introduction of fluorine can enhance the free carrier density of the nanocrystals, which can lead to a higher absorption coefficient. The absorption coefficient variation of LSPR effect and small polaron transfer was explained by the variation of free carrier density and carrier mobility. When the F/W molar ratio was 0.4, the free carrier density reached 9.25 × 1014 cm-3. The spectrally selective coating prepared by F-doped CsxWO3 nanocrystals exhibited superior spectral selectivity with TVis, TNIR, Tlum, and Tsol of 67.21%, 11.85%, 72.76% and 49.01%, respectively. This substitutional doping strategy provides a promising potential to improve the spectral modulation of CsxWO3 nanocrystals for practical application of energy-saving windows.
KW - Absorption coefficient
KW - Carrier mobility
KW - Energy-efficient windows
KW - F-doped CsWO nanocrystals
KW - Free carrier density
UR - http://www.scopus.com/inward/record.url?scp=85120420428&partnerID=8YFLogxK
U2 - 10.1016/j.solmat.2021.111519
DO - 10.1016/j.solmat.2021.111519
M3 - Journal article
AN - SCOPUS:85120420428
SN - 0927-0248
VL - 236
JO - Solar Energy Materials and Solar Cells
JF - Solar Energy Materials and Solar Cells
M1 - 111519
ER -
