The Phase Transition and Thermochromic Characteristics of W/Mg-codoped Monoclinic VO2 Nanoparticle and Its Composite Film

Journal of the Korean Chemical Society

Heesun Park¹ 

关键词: Monoclinic VO2;    Thermochromic;    Semiconductor-to-metal phase transition;    W/Mg-codoping;    NIR switching efficiency;   

DOI  :  

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Monoclinic VO2(M) nanoparticles codoped with 1.5 at. % W and 2.9 at. % Mg were synthesized by the hydrothermal treatment and post-thermal transformation method of V2O5-H2C2O4-H2O with Na2WO4 and Mg(NO3)2. The composite thin film of the W/Mg-codoped VO2(M) with a commercial acrylic block copolymer was also prepared on PET substrate by wet-coating method. The reversible phase transition characteristics of the codoped VO2(M) nanoparticles and the composite film were investigated from DSC, resistivity and Vis-NIR transmittance measurements compared with the undoped and Wdoped VO2(M) samples. Mg-codoping into W-doped VO2(M) nanoparticles synergistically enhanced the transition characteristics by increasing the sharpness of transition while the transition temperature (Tc) lowered by W-doping was maintained. The codoped composite film showed the prominently enhanced NIR switching efficiency compared to only W-doped VO2(M) film with a lowered Tc.

【 授权许可】

Unknown