Photonics materials - 1Virtual room: Optonique - 3
|Tuesday, May 26|
PM-1-26-1 / Arranging Nanoparticles in Organic Layers for Enhancement of Photoconductivity
* Alexey Tameev, A.N. Frumkin Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Scie, Russian Federation
Nanosize particles of metals and semiconductors incorporated in organic layers effect electronic/photonic responses of organic electronics devices. In polymer and fullerene solid layers, arrangements of (1) plasmonic Au nanoparticles, (2) graphene nano-stacks, and (3) PbS quantum dots size gradient are considered and appropriate mechanisms of electron transfer are proposed.
PM-1-26-2 / Photovoltaic Bacteriorhodopsin Graphene-Cellulose Composite Transducer
Khaled Al-Aribe, Abu Dhabi University
* George Knopf, The University of Western Ontario, Canada
An organic photovoltaic transducer is fabricated by combining bacteriorhodopsin (bR) purple membranes with a graphene - carboxymethyl cellulose (G-CMC) dispersion and depositing the solution on an optically transparent indium tin oxide coated substrate. The G-CMC nanoparticles act as charge carriers between the stacks of high resistance bR purple membrane sheets. Once dried the exposed surface of the bR-G-CMC transducer is coated with a conductive epoxy to create a sandwiched photocell. The measured photovoltaic response of the composite transducer is more than 3.2× the voltage generated by a bR-only transducer. Experiments also demonstrate that the electrical resistance is significantly reduced from several hundred k-Ohms (bR-only) to < 20Ω (bR-G-CMC). The chemical synthesis, device fabrication, and experimental characterization of the bR-G-CMC transducer are discussed.
PM-1-26-3 / Analysis of Coloration efficiency and optical bad gap of nanostructured molybdenum Trioxide Thin Films
* Bassel Abdel Samad, Université de Moncton, Canada
Molybdenum trioxide (MoO3) thin films have been prepared by thermal evaporation technique on glass substrates at room temperature. The electrical and optical properties of the films were studied. A link between the applied voltage and the coloration was established. As well as the optical constants and the bad gap of the samples were calculated. The results show that there is a relation between the optical constant values and the coloration. The optical bad gap was calculated according to the degree of colouring. In addition, we found that the applied voltage affects the amorphous samples but not the annealed sample. More over, MoO3 thin film can be undergoes in an irreversible process of colouring for applied voltage more than 1 volt.