TY - JOUR
T1 - Scalable all-ceramic nanofilms as highly efficient and thermally stable selective solar absorbers
AU - Li, Yang
AU - Lin, Chongjia
AU - Zhou, Dan
AU - An, Yiming
AU - Li, Dezhao
AU - Chi, Cheng
AU - Huang, He
AU - Yang, Shihe
AU - Tso, Chi Yan
AU - Chao, Christopher Y.H.
AU - Huang, Baoling
N1 - Funding Information:
The authors are thankful for the financial support from the Hong Kong General Research Fund (Grant Nos. 16213015 , 16245516 , and 16214217 ) and the Hong Kong Collaborative Research Fund ( C6022-16G ) and technical support of the Nanosystem Fabrication Facility (NFF) of HKUST for the device fabrication.
Publisher Copyright:
© 2019
PY - 2019/10
Y1 - 2019/10
N2 - The pressing demands for next-generation concentrating solar power drive the pursuit of high-efficiency, thermally stable, and scalable spectrally selective absorbers. Multilayer metal/ceramic nanofilms are promising candidates owing to their strong sunlight absorption provided by extremely simple configurations and facile fabrication. However, the commercial success of such absorbers is still hindered by their unsatisfactory spectral selectivity and high-temperature stability associated with metal/ceramic interfaces. Here we first propose an all-ceramic TiN/TiNO/ZrO2/SiO2 absorber with highly selective absorption, i.e., a high solar absorptance (92.2%) yet an ultralow thermal emittance (17.0% at 1000 K), producing an unprecedented solar-thermal conversion efficiency (82.6% under 100 suns). Remarkably, the absorber shows great thermal stability even after long-term (150 h) annealing at 1000 K, boosting the operating temperature of conventional multilayer absorbers by at least 227 K. The efficient and stable all-ceramic absorber can be readily produced in quantity via low-cost processes, rendering it attractive for high-temperature solar-thermal technologies.
AB - The pressing demands for next-generation concentrating solar power drive the pursuit of high-efficiency, thermally stable, and scalable spectrally selective absorbers. Multilayer metal/ceramic nanofilms are promising candidates owing to their strong sunlight absorption provided by extremely simple configurations and facile fabrication. However, the commercial success of such absorbers is still hindered by their unsatisfactory spectral selectivity and high-temperature stability associated with metal/ceramic interfaces. Here we first propose an all-ceramic TiN/TiNO/ZrO2/SiO2 absorber with highly selective absorption, i.e., a high solar absorptance (92.2%) yet an ultralow thermal emittance (17.0% at 1000 K), producing an unprecedented solar-thermal conversion efficiency (82.6% under 100 suns). Remarkably, the absorber shows great thermal stability even after long-term (150 h) annealing at 1000 K, boosting the operating temperature of conventional multilayer absorbers by at least 227 K. The efficient and stable all-ceramic absorber can be readily produced in quantity via low-cost processes, rendering it attractive for high-temperature solar-thermal technologies.
KW - All-ceramic nanofilms
KW - Concentrating solar power
KW - Solar-thermal energy conversion
KW - Spectrally selective absorber
KW - Thermal stability
UR - http://www.scopus.com/inward/record.url?scp=85070095136&partnerID=8YFLogxK
U2 - 10.1016/j.nanoen.2019.103947
DO - 10.1016/j.nanoen.2019.103947
M3 - Journal article
AN - SCOPUS:85070095136
SN - 2211-2855
VL - 64
JO - Nano Energy
JF - Nano Energy
M1 - 103947
ER -
