APCVD Transition Metal Oxides _ Functional Layers in "Smart windows"

INERA Workshop: Transition Metal Oxide Thin Films-functional Layers in "Smart windows" and Water Splitting Devices

Gesheva, K.A.^1 ; Ivanova, T.M.^1 ; Bodurov, G.K.^1

Central Laboratory of Solar Energy and New Energy Sources, Bulgarian Academy of Sciences, Blvd. Tzarigradsko chaussee 72, Sofia, Bulgaria^1

关键词: Device optimization;    Electrochromic effect;    Electrochromic performance;    Electrochromic properties;    Kinetic properties;    Large scale productions;    Multi-layer system;    Thin film material;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/559/1/012002/pdf
DOI  :  10.1088/1742-6596/559/1/012002

来源: IOP

【 摘 要 】

Transition metal oxides (TMO) exhibit electrochromic effect. Under a small voltage they change their optical transmittance from transparent to collored (absorbing) state. The individual material can manifest its electrochromic properties only when it is part of electrochromic (EC) multilayer system. Smart window is controlling the energy of solar flux entering the building or car and makes the interiors comfortable and energy utilization more effective. Recently the efforts of material researchers in this field are directed to price decreasing. APCVD technology is considered as promissing as this process permits flowthrough large-scale production process. The paper presents results on device optimization based on WO3-MoO3working electrode. Extensive research reveals that WO3-MoO3structure combines positive features of single oxides: excellent electrochromic performance of WO3and better kinetic properties of MoO3deposition. The achieved color efficiency of APCVD WO3-MoO3films is 200cm2/C and optical modulation of 65-70% are practically favorable electrochromic characteristics. To respond to low cost requirement, the expensive hexacarbonyl can be replaced with acetylacetonate. We have started with this precursor to fabricate mixed WxV1-xO3films. The films possess excellent surface coverage and high growth-rate. CVD deposition of VO2, a promissing thermochromic thin film material is also presented.