Functional Properties of APCVD VO2 Layers

The growth of isolated monoclinic and metastable vanadium dioxide phases was possible by the atmospheric pressure chemical vapor deposition at 500 oC through the control of oxygen flow rate. The as-grown coating for 0.2 L min-1 showed a reversible switching behavior at 62 oC with a difference in transmittance of the order of 40 %. On the other hand, the coating deposited for 0.8 L min-1 had good electrochemical response presenting capacitance retention of 96 % after 500 scans. The results are discussed in terms of the materials’ observed structure and morphology. We showed that the transition characteristics of the coatings are based on the competing effects of crystallinity and crystallite size, while their electrochemical response is related to the increased surface area ratio of the nanorods

Oxygen source-oriented control of atmospheric pressure chemical vapor deposition of VO2 for capacitive applications

Vanadium dioxides of different crystalline orientation planes have successfully been fabricated by chemical vapor deposition at atmospheric pressure using propanol, etha-nol and O2 gas as oxygen sources. The thick a-axis textured monoclinic vanadium dioxide obtained through propanol presented the best electrochemical response in terms of the highest specific discharge capacity of 459 mAh g-1 with a capacitance retention of 97 % after 1000 scans under constant specific current of 2 A g-1

Three-Dimensional Adaptive Sensing of People in a Multi-Camera Setup

Publication in the conference proceedings of EUSIPCO, Aalborg, Denmark, 201

Ternary organic solar cells incorporating zinc phthalocyanine with improved performance exceeding 8.5%

Summarization: Ternary organic photovoltaic devices have been fabricated, by introducing for the first time, a soluble zinc phthalocyanine (ZnPc) small molecule into the poly-({4,8-bis[(2-thylhexyl)oxy]benzo[1,2-b:4,5-b’]dithiophene-2,6-diyl}{3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b] thiophenediyl}) (PTB7):[6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) active layer. The ZnPc acts as an electron cascade material, providing an efficient energy level offset between the polymeric donor (D) and the fullerene derivative acceptor (A), enhancing charge transfer, reducing exciton recombination and thus improving the photovoltaic performance of the devices. The fabricated ternary organic solar cells of the structure ITO/PEDOT:PSS/PTB7:ZnPc:PC71BM/Ca/Al led to a champion power conversion efficiency (PCE) of 8.52%, increased by ∼15% compared to the reference binary cell.Presented on: Dyes and Pigment