Structural modifications to the surface of active layer hybrid organic-inorganic self-powered broadband photodetectors lead a remarkable enhancement in their photoresponse.

The accurate determination of the electrical properties photovoltaic devices is utmost importance to predict and optimize their overall optoelectronic performance. For example, minority carrier lifetime diffusion length have a strong relationship with recombination rate. Additionally, parasitic resistances an important effect on fill factor solar cell. Within this context, alternating current (AC) direct (DC) characteristics Si-based metal–insulator–semiconductor (MIS) Schottky barrier...

Abstract As subwavelength nanostructures are receiving increasing attention for photonic and plasmonic applications, we grew nanostructured porous silicon (n-PS) hybrid n-PS/Ag layers onto substrates measured their reflection absorption characteristics as functions of the wavelength, angle incidence, polarization state incident light. The experimental results show that layer can be controlled by selecting appropriate combination its thickness porosity, together with density infiltrant silver...

Ti-doped ZnO thin films were obtained with the aim of tailoring film bioadhesiveness and making optoelectronic properties materials transferable to biological environments. The prepared on silicon substrates by sol-gel spin-coating subsequent annealing. A Ti-O segregation limits crystallite growth creates a buffer out-layer. Consequently, presents slightly increased resistivity, which remains in order 10-3 Ω·cm. strong biochemical interference Zn2+ ions released from pure surfaces was...

The ZnO semiconductor is probably among the most mentioned compounds in scientific literature during last decade, which mainly due to its wide spectrum of applications. Compounds based on (in doped or composite form) are great relevance for development high-tech devices. In this work, we present growth and characterization samples deposited by DC Magnetron co-sputtering from two pure Zn Ag targets an O2 / Ar atmosphere. were characterized as after annealing treatment a reducing We have used...

Indium-tin oxide (ITO) is widely used as a transparent electrode for optoelectronic devices given its large transparency and high conductivity. However, the particular properties of this material greatly depend on overall fabrication process. We report effect four different postfabrication processes ITO thin films grown by electron beam evaporation. More specifically, evaporated microwave plasma annealing, rapid thermal processing, two combined were analyzed. In particular, morphological,...

The luminescent properties of zinc oxide (ZnO) and nanostructured porous silicon (PSi) make these materials very appealing for photoemission applications. current study reports on the fabrication a composite ZnO micropatterns (ZnO + PSi micropatterns) onto heavily-doped surfaces. proposed micropattern is devoted to future development light-emitting diodes. was carried out in two–step process. (1) A regular hexagonal photoresist/ZnO stack fabricated by UV lithography crystalline substrates....

Hybrid nanostructures have a great potential to improve the overall properties of photonic devices. In present study, silver nanoparticles (AgNPs) were infiltrated into nanostructured porous silicon (PSi) layers, aiming at enhancing optoelectronic performance Si-based More specifically, Schottky diodes with three different configurations fabricated, using Al/Si/Au as basic structure. This structure was modified by adding PSi and + AgNPs layers. Their characteristic electrical parameters...

Nanostructured porous silicon (PS) can be used as a template for the growth of noble metal nanoparticles subsequent development metal/semiconductor hybrid structures with application in several fields. The current work reports on electrodeposition silver (AgNPs) into columnar PS layers. In particular, size, morphology, and surface density AgNPs grown were studied function electrolyte pH value infiltration density. Furthermore, optical properties + analyzed. experimental results show...

The physical properties of porous silicon (PSi) can be adjusted to provide a better performance in optoelectronic devices. A controlled method commonly used fabricate PSi is the anodization process, which employs platinum as conventional cathode. Herein, we investigate effect replacing Pt cathode with symmetric heavily doped on resulting surface structure substrates. configuration established when both anode and are from same material. Three different samples were anodized using...

Nanostructured materials remarkably improve the overall properties of thermoelectric devices, mainly due to increase in surface-to-volume ratio. This behavior is attributed an increased number scattered phonons at interfaces and boundaries nanostructures. Among many other materials, nanostructured Si was used expand power generation compared bulk crystalline Si, which leads a reduction thermal conductivity. However, use electrical conductivity formation low dimensional features heavily doped...

Abstract The precise knowledge of the values optical constants (index refraction, n , and extinction coefficient, k ) for nanostructured porous silicon (nanoPS) is a necessary condition to predict behavior any photonic devices based on this material. With objective in mind, simulation computational program matrix method was used determine visible range self-standing nanoPS films from their experimental reflectance transmittance spectra. Furthermore, spectral absorption coefficient ( α...

Highly Ti-doped ZnO films have been produced by a spin-casting sol-gel process. The spin-casted show high in plane homogeneity and optical quality. However, when inspected depth, the surface composition is Ti rich. We that two possible annealing processes can be considered depending on properties to exploit. To promote in-depth homogenization, thermal applied. Meanwhile, gradients exacerbated, thanks non-negligible sputtering, applying microwave (MW) plasma treatments with Ar discharges at...

The electrochromic (EC) performance of smart windows is highly dependent on the rate ions insertion/extraction. A direct way to increase ion exchange in EC device modify structure electrodes. Structural changes also affect electrical conduction between transparent electrodes and layers, leading efficient windows. In more detail, modifying results an surface-to-volume ratio, which combined with charge transfer reaction insertion extraction ions. current review summarizes enhancement due...

Interactivity between human and smart systems has an awesome impact on our daily life through a simple detection of motions by strain sensors. poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) is conducting polymer commonly used for stretchable/conducting Here, we describe flexible, stretchable, conductive piezoresistive sensor based PEDOT:PSS which under development its future in motion detections. This can detect small strains shows remarkable sensitivity due to the...