Synthesis and Characterization of Nb, Mo-doped and Nb/Mo-codoped Monoclinic VO 2 Nanoparticles and Their Thin Films by Hydrothermal/Post-Thermal Transformation and Wet-Coating Method

Journal of the Korean Chemical Society

article

Jongmin Kim¹  Young Hee Jung²  Jun Young Kwak²  Yeong Il Kim¹ 

[1] Department of Chemistry, Pukyong National University;Research Laboratory, Inc. Busan 48547

关键词: VO2(M);    Thermochromic;    Semiconductor-to-metal phase transition;    Nb-doping;    Nb/Mo-codoping;   

DOI  :  10.5012/jkcs.2019.63.2.94

学科分类：化学（综合）

来源: Korean Chemical Society

【 摘 要 】

Nb, Mo-doped and Nb/Mo-codoped VO2(M) nanocrystallites with various doping levels were synthesized for the first time by a hydrothermal and post thermal transformation method. The reversible phase transition characteristics of those doped VO2(M) was comparatively investigated. Nb-doping of VO2(M) by this method resulted in a very efficient lowering of the transition temperature (Tc) with a rate of -16.7 o C/at.% that is comparable to W-doping, while Mo-doping did not give a serious reduction of Tc with only a rate of -5.1 o C/at.%. Nb/Mo-codoping gave a similar result to Nb-doping without a noticeable difference. The thin films of Nb-doped and Nb/Mo-codoped VO2(M) with a thickness of ca. 120 nm were prepared by a wet-coating of the nanoparticle-dispersed solutions. Those films showed a good thermochromic modulation of near infrared radiation with 30-35% for Nb-doped VO2(M) and 37-40% for Nb/Mo-codoped ones. Nb/Mo-codoped VO2(M) film showed slightly enhanced thermochromic performance compared with Nb-doped VO2(M) film.

【 授权许可】

Unknown