In this work we present a comprehensive study of the role hydrogen in structure, morphology, composition and electro-optical properties zinc oxide thin films deposited by rf reactive magnetron sputtering at room temperature. The transparency conductivity situ hydrogenated (ZnO:H) are improved with addition H2 to atmosphere, where resistivity dropped one order magnitude (from 3×10−2 2.8×10−3 Ωcm) for an optimal dilution 1.5% argon. effect undoped ZnO has been attributed shallow donor...

Abstract Solar photovoltaics (PV) offer viable and sustainable solutions to satisfy the growing energy demand meet pressing climate targets. The deployment of conventional PV technologies is one major contributors ongoing transition in electricity power sector. However, diversity paradigms can open different opportunities for supplying modern systems a wide range terrestrial, marine, aerospace applications. Such ubiquitous versatile applications necessitate development with customized design...

Radiative cooling to subambient temperatures can be efficiently achieved through spectrally selective emission, which until now has only been realized by using complex nanoengineered structures. Here, a simple dip-coated planar polymer emitter derived from polysilazane, exhibits strong emissivity in the atmospheric transparency window of 8–13 μm, is demonstrated. The 5 μm thin silicon oxycarbonitride coating an 0.86 this spectral range because alignment frequencies bond vibrations arising...

It is generally believed that nature does not provide materials with negative refraction. Here we demonstrate experimentally such do exist at least GHz frequencies: ferromagnetic metals reveal a refraction index close to the frequency of resonance. The experimental realization utilizes colossal magnetoresistance manganite ${\mathrm{La}}_{2/3}{\mathrm{Ca}}_{1/3}{\mathrm{MnO}}_{3}$ as an example. In this material refractive can be achieved even room temperature using external magnetic fields.

Satellites in lower earth orbits have been primarily powered by photovoltaic modules. With growing power demand for new satellite concepts, solar cells are required to be flexible and ultra-lightweight decrease launch costs. CIGS thin film technology is a promising candidate, since it can manufactured on substrates possesses high radiation hardness. Poor radiative properties of the other hand, lead temperatures therefore loss. High emissivity coatings already reported but influence thermal...

Transition metal dichalcogenides, such as molybdenum disulfide (MoS2), have unique electronic and optoelectronic properties that are often altered by environmental effects, particularly substrate or contact materials. Understanding these effects is important for device design engineering. There limited information concerning how MoS2 interacts with 3D semiconductors oxides. This work demonstrates the influence of material layer thickness on function exfoliated flakes. Kelvin probe force...

In densely populated areas, ground mounted photovoltaic power plants compete with agriculture for cultivable land. Agrivoltaic systems allow the combination of these two forms land use by deliberately designed light sharing. this contribution, we present a spectrally selective solar cell, in agrivoltaic systems, greenhouses, and photo-bioreactors. Our concept benefits from cell transmission spectrum which can be easily tuned specific absorption requirements algae plants. This is achieved...

Epitaxial La3/4Ca1/4MnO3/MgO(100) (LCMO) thin films show unusual rhombohedral (R-3c) structure with a new perovskite superstructure due to unique ordering of La and Ca at the A-site positions. Very sharp insulator-metal para-ferromagnetic phase transitions temperatures up TMI ~ TC=295 K were observed. The ordered electronically homogeneous down 1 nm scale as revealed by scanning tunnelling microscopy/spectroscopy. In contrast, orthorhombic disordered LCMO demonstrate broadened well...

The metal-insulator (MI) transition in epitaxial thin films of ${\text{La}}_{0.75}{\text{Ca}}_{0.25}{\text{MnO}}_{3}$ (LCMO) is accompanied by the appearance an intrinsic electrical nonlinearity. latter, probed third harmonic voltage, ${U}_{3\ensuremath{\omega}}$, or resistance, ${R}_{3\ensuremath{\omega}}=d{U}_{3\ensuremath{\omega}}/dJ$, drastically enhanced vicinity MI transition, ${T}_{\text{MI}}=267\text{ }\text{K}$. Applied magnetic field, $B=5\text{ }\text{T}$, suppresses nonlinearity,...

Abstract The high cost of building integrated photovoltaics is one the main reasons preventing a more widespread application. We propose panel‐on‐demand concept for flexible design thin‐film to address this issue. based on use semi‐finished PV modules (standard mass products) with subsequent refinement into BIPV modules. In study, we demonstrate three processes necessary realize concept. First, prototype tool cut thin film photovoltaic elements glass substrates laser perforation was...

Approaching the first terawatt of installations, photovoltaics (PV) are about to become major source electric power until mid-century. The technology has proven be long lasting and very versatile today PV modules can found in numerous applications. This is a great success entire community, but taking future growth for granted might dangerous. Scientists have recently started call accelerated innovation cost reduction. Here, we show how ultrathin absorber layers, only few nanometers...

Fabry-Perot-type resonant nanocavities allow for broadband enhancement of light absorption in ultrathin absorber layers. By introducing a switchable mirror, these thin film structures can be used as unique optical devices enabling interesting applications with absorption. We use photovoltaic layer stack based on an amorphous germanium and combine it Mg/Pd mirror to create solar cell. In this work we demonstrate how switch the and, hence, photocurrent generation cell by changing refractive...

Abstract Unlike conventional opaque solar cells, semi‐transparent cells enable simultaneous electricity generation and light transmission. Along with energy harvesting, the offered multiple functionalities of these technologies, such as aesthetic appearance, visual comfort thermal management, open diverse integration opportunities into versatile technological applications. In this work, first demonstration a novel cell based on ultrathin hydrogenated amorphous Si/Ge quantum wells (MQW) is...

(La${}_{2/3}$Ca${}_{1/3}$MnO${}_{3}$)${}_{n}$/(BaTiO${}_{3}$)${}_{m}$ (LCMO${}_{n}$/BTO${}_{m}$) superlattices on MgO and SrTiO${}_{3}$ substrates with different layer thicknesses ($n$ $=$ 10, 38, 40 $m$ 5, 18, 20) have been grown by metal organic aerosol deposition (MAD) fully characterized down to the atomic scale study interface characteristics. Scanning transmission electron microscopy combined spatially resolved energy-loss spectroscopy provides clear evidence for existence of...

Abstract Oxide/metal/oxide (OMO) layer stacks are used to replace transparent conductive oxides as front contact of thin-film solar cells. These multilayer structures not only reduce the overall thickness contact, but can be for colouring cells utilizing interference effects. However, sheet resistance and parasitic absorption, both which depend heavily on metal layer, should further reduced reach higher efficiencies in In this publication, AgO X wetting layers were applied OMO electrodes...

Defect‐rich black titanium dioxide (B‐TiO 2 ) has been extensively studied over the past decade due to its enhanced photoelectrochemical efficiency compared (TiO ), which is known for outstanding photocatalytic stability. So far, most of B‐TiO material obtained by hydrogenation crystalline TiO , resulting in a disordered outer layer few nanometers thickness. Recently, new sputtering process introduced produce thin films without usage hydrogen. Herein, influence on creation Ti 3+ defect...

Abstract Ultrathin solar cells are efficient and captivating devices with unique technological scientific features in terms of minimal material consumption, fast fabrication processes, good compatibility semi‐transparent applications. Such photovoltaic (PV) technologies can enable effective synergy between optical electronic confinements large tuning capabilities all the optoelectronic characteristics. In this work, implications design bandgap engineering ultrathin hydrogenated amorphous...

An interface modification of $(\text{LaCa}){\text{MnO}}_{3}{\text{-BaTiO}}_{3}$ superlattices was found to massively influence magnetic and magnetotransport properties. Moreover it determines the crystal structure manganite layers, changing from orthorhombic $(Pnma)$ for conventional superlattice (cSL), rhombohedral $(R\overline{3}c)$ modified one (mSL). While cSL shows extremely nonlinear ac transport, mSL is an electrically homogeneous material. The observations go beyond oversimplified...

Subwavelength optical nanocavity using semiconductor nanostructures is a key nanophotonic approach for various optoelectronic devices. In such low-dimensional systems, size-dependent changes can arise due to quantum confinement (QC). this article, the implications of quantum-size effects on light harvesting in ultrathin single well solar cell (SQWSC) are analyzed. This device based silicon (barrier)/germanium (QW) integrated as deep-subwavelength resonator. Compared with state-of-the-art,...