TY - JOUR
T1 - Tuning the electrical and optical properties of Gd1-xCaxBaCo2O5+δ (x = 0-0.5) using solar energy
AU - Lu, Yi
AU - Zhang, Rong
AU - Wei, Ling
AU - Lu, Chunhua
AU - Fang, Zhenggang
AU - Ni, Yaru
AU - Xu, Zhongzi
AU - Tao, Shunyan
N1 - Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/6/15
Y1 - 2016/6/15
N2 - This study reveals that the use of a Ca dopant can increase the solar absorption of GdBaCo2O5+δ, with an optimal composition of Gd0.8Ca0.2BaCo2O5 achieving 85% solar absorptance. Electrical conductivity measurements revealed that this composition allows for faster insulator-metal transition and higher conductivity, with the observed variation in conductivity with 0.8 W/cm2 of solar illumination explained in terms of a first-order spin-state transition. Thermal radiation imaging confirmed that regions of different radiative temperature are related to a change in free carriers that promote scattering, and therefore, cause an increase in infrared reflection. This rapid electrical conductivity transition and the low infrared radiation properties at high temperatures strongly suggest that Gd0.8Ca0.2BaCo2O5 could be used in a variety of potential fields, such as high-temperature thermosensitive or thermal storage materials.
AB - This study reveals that the use of a Ca dopant can increase the solar absorption of GdBaCo2O5+δ, with an optimal composition of Gd0.8Ca0.2BaCo2O5 achieving 85% solar absorptance. Electrical conductivity measurements revealed that this composition allows for faster insulator-metal transition and higher conductivity, with the observed variation in conductivity with 0.8 W/cm2 of solar illumination explained in terms of a first-order spin-state transition. Thermal radiation imaging confirmed that regions of different radiative temperature are related to a change in free carriers that promote scattering, and therefore, cause an increase in infrared reflection. This rapid electrical conductivity transition and the low infrared radiation properties at high temperatures strongly suggest that Gd0.8Ca0.2BaCo2O5 could be used in a variety of potential fields, such as high-temperature thermosensitive or thermal storage materials.
KW - Ceramics
KW - Electrical characterization
KW - Electronic materials
KW - Infrared spectroscopy (IR)
UR - http://www.scopus.com/inward/record.url?scp=84961923509&partnerID=8YFLogxK
U2 - 10.1016/j.matchemphys.2016.03.016
DO - 10.1016/j.matchemphys.2016.03.016
M3 - 文章
AN - SCOPUS:84961923509
SN - 0254-0584
VL - 176
SP - 44
EP - 51
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
ER -