| 초록 |
The monoclinic vanadium dioxide, VO2 (M), is considered an ideal intelligent material because f the low value of its reversible critical phase transition temperature. VO2 (M) nanoparticles doped with Nb and W were easily synthesized by hydrolysis and subsequent thermal decomposition; both the Nb and W dopants had no significant influence on the VO2 (M) crystalline structure. The transition temperature of Nb-doped VO2 (M) was reduced from 60 to 19.6 °C upon Nb doping, and decreased by around 10 °C per atomic percent of Nb dopant. The transition temperature of VO2 (M) can be accurately adjusted to room temperature by W-Nb co-doping, for use in smart windows. A film prepared using co-doped VO2(M) nanoparticles showed a solar modulation ability of ~18% and a luminous transmittance of 50%, indicating that the co-doped VO2 (M) nanoparticles represent suitable candidates for smart window applications |
