Laser Prepared Thin Films for Optoelectronic Applications

Abstract

Laser techniques such as pulsed laser deposition, combinatorial pulsed laser deposition, and matrix-assisted pulsed laser evaporation were used to deposit thin films for optoelectronic applications. High-quality transparent conductor oxide films ITO, AZO, and IZO were deposited on polyethylene terephthalate by PLD, an important experimental parameter being the target-substrate distance. The TCO films present a high transparency (>95%) and a reduced electrical resistivity (5 × 10 −4 Ωcm) characteristics very useful for their integration in the flexible electronics. In x Zn 1−x O films with a compositional library were obtained by CPLD. These films are featured by a high optical transmission (>95%), the lowest resistivity (8.6 × 10 −4 Ωcm) being observed for an indium content of about 44-49 at.%. Organic heterostructures based on arylenevinylene oligomers (P78 and P13) or arylene polymers (AMC16 and AMC22) were obtained by MAPLE. In the case of ITO/P78/Alq3/Al heterostructures, a higher current value is obtained when the film thickness increases. Also, a photovoltaic effect was observed for heterostructures based on AMC16 or AMC22 deposited on ITO covered by a thin layer of PEDOT:PSS. Due to their optical and electrical properties, such organic heterostructures can be interesting for the organic photovoltaic cells (OPV) applications.

Effect of heavy ions irradiation on the properties of benzil crystals

“…In the last decades, the organic molecular crystals have been considered as potential substitutes for inorganic crystals in nonlinear optical applications because of high nonlinear coefficients, large birefringence, high damage thresholds in laser beam and large transparency domain …”