Abstract The Luminescent Solar Concentrator (LSC) consists of a transparent polymer plate, containing luminescent particles. cells are connected to one or more edges the plate. Incident light is absorbed by particles and re‐emitted. Part emitted guided towards solar total internal reflection. Since edge area smaller than receiving one, this allows for concentration sunlight without need tracking. External Quantum Efficiency (EQE) current–voltage ( I – V ) measurements were performed on LSC...

Optical waveguide amplifiers based on polymer materials offer a low-cost alternative for inorganic amplifiers. Due to the fact that their refractive index is similar of standard optical fibers, they can be easily coupled existing fibers with low coupling losses. Doping rare-earth ions yield gain not straightforward, as salts are poorly soluble in matrix. This review article focuses two different approaches dope ions. The first approach organic cage-like complexes encapsulate ion and designed...

Combining conjugated poylmers and TiO 2 in hybrid bulk‐heterojunctions is a promising method for producing novel solar cells. Here introduced into poly( p ‐phenylene vinylene) layer. Nanometer‐scale phase separation allows efficient photoinduced charge transfer between the two components. The films can be used as active layer photovoltaic cell provide external quantum efficiencies of up to 11 % (see Figure).

A power conversion efficiency of 4.2% (AM1.5, 1000W∕m2) is measured for an organic solar cell based on active layer alternating copolymer, containing a fluorene and benzothiadiazole unit with two neighboring thiophene rings, fullerene derivative. Using optical modeling, the absorption profile in calculated used to calculate maximum short circuit current. The currents are compared from current-voltage measurements various film thicknesses. From this internal quantum estimated be 75% at best device.

Abstract We describe a new method towards bulk‐heterojunction hybrid polymer solar cells based on composite films of zinc oxide (ZnO) and conjugated poly[2‐methoxy‐5‐(3′,7′‐dimethyloctyloxy)‐1,4‐phenylene vinylene] (MDMO‐PPV). Spin‐coating diethylzinc as ZnO precursor MDMO‐PPV from common solvent at 40 % humidity annealing 110 °C provides in which crystalline is found to be intimately mixed with MDMO‐PPV. Photoluminescence photoinduced spectroscopy demonstrate that photoexcitation these...

Abstract Indium‐tin‐oxide (ITO) free polymer solar cells prepared by ink jet printing a composite front electrode comprising silver grid lines and semitransparent PEDOT:PSS conductor are demonstrated. The effect of line density is explored for large series devices careful modeling study enabling the identification most rational structure presented. Both optical light beam induced current (LBIC) mapping used to support power loss model follow evolution performance over time. Current...

In this work we describe the relative performance of largest luminescent solar concentrator (LSC) constructed to date. Comparisons are made for North/South and East/West facing panels during a sunny day. It is shown that display much more varied day, as structural elements barrier interfere with illumination cause shading, but perform similarly both front back conditions. The results extended, 200 day measurement period mirror single results. This demonstrates importance frame design...

The optical properties of different erbium (Er)-doped polydentate hemispherand organic cage complexes are studied, for use in polymer-based planar amplifiers. Room temperature photoluminescence at 1.54 μm is observed, due to an intra-4f transition Er3+. Er directly excited into one the 4f manifolds (at 488 nm), or indirectly 287 nm) via aromatic part cage. luminescence spectrum 70 nm wide (full width half maximum), highest known any Er-doped material, enabling high gain bandwidth...

Hexa-deutero dimethylsulfoxide (DMSO-d6) solutions of terphenyl-based Nd3+, Yb3+, and Er3+ complexes functionalized with a triphenylene antenna chromophore exhibit room temperature near-infrared luminescence at wavelengths interest for the optical telecommunication network (∼1330 ∼1550 nm). The sensitizing process takes place through triplet state as can be concluded from oxygen dependence sensitized luminescence. A significant fraction excited is quenched by oxygen, instead contributing to...

We report 890 nm luminescence from a neodymium-doped polymer light-emitting diode. The active layer is blend of poly(dioctylfluorene-co-benzothiadiazole), F8BT, and lissamine-functionalized terphenyl-based neodymium complex. detect electroluminescence both the lissamine (580 nm) Nd3+ complex (890 nm). By comparison with lissamine-free devices we show that crucial to infrared emission. neodymium/lissamine intensity ratio higher under electrical excitation than optical excitation, showing more...

Optical interference effects are important for the total absorption as well profile of exciton generation rate in polymer:fullerene bulk heterojunction solar cells. For cells with an active layer poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylenevinylene] electron donor and [6,6]-phenyl C61 butyric acid methyl ester acceptor, can be directly extracted from saturated photocurrent. It is demonstrated that thickness smaller than 250nm, a constant profile, based on this rate, gives...

This paper discusses the opportunities and challenges of designing products using luminescent solar concentrator (LSC) photovoltaic (PV) technologies. The focus is on integration LSC PV technologies in modules, future buildings. It shown that typical material properties LSCs — low cost, colorful, bendable, transparency offer a lot design freedom. Two differently designed modules with back contacted cells are presented including ray-tracing simulations experimental results resulting from...

Silica colloids with a diameter of 240–360 nm, grown by wet chemical synthesis using ethanol, ammonia, water, and tetraethoxysilane, were implanted 350 keV Er ions, to peak concentrations 0.2–1.1 at. % put onto silicon or glass substrate. After annealing at 700–900 °C the show clear room-temperature photoluminescence 1.53 μm, lifetimes as high 17 ms. By comparing data different concentrations, purely radiative lifetime is estimated be 20–22 ms, indicating quantum efficiency about 80%. This...

Indium‐tin‐oxide‐free (ITO‐free) polymer solar cells with composite electrodes containing current‐collecting grids and a semitransparent poly(3,4‐ethylenedioxythiophene):polystyrenesulfonate) (PEDOT:PSS) conductor are demonstrated. The up‐scaling of the length cell from 1 to 6 cm effect grid line resistance explored for series devices. Laser‐beam‐induced current (LBIC) mapping is used quality control A theoretical modeling study presented that enables identification most rational dimension...

In this paper, both the performance and stability of luminescent flat plate concentrator (LFPC) plates in combination with mc-Si photovoltaic cells are studied. It is shown that electrical current a silicon solar cell attached to improved by factor 1.5 using LFPC containing single dye. also most dyes not stable polymer currently used. Screening several other indicates strongly dependent on type dye matrix, e.g., additives or monomer residues.

We report on the relative performances of two large-scale luminescent solar concentrator (LSC) noise barriers placed in an outdoor environment monitored for over a year. Comparisons are made number attached photovoltaic cells with changing spectral illumination, cloud cover conditions and other seasonal variations, temperatures cells. Differences performance attributed to positioning panels, whether facing North/South or East/West. In general, panels East/West run cooler than those...

A full-size (1 × 5 m2) luminescent solar concentrator (LSC) has been constructed and the edge electric outputs from attached photovoltaic cells monitored for a period of slightly over one year in noise barrier (SONOB) “living lab” outdoor environment. The results output measurements were compared to ray-tracing simulations, revealing imperfections system design production that resulted significantly reduced performance panel expectations. Results these calculations suggest emission...

The local optical density of states (LDOS) in 340-nm-diam ${\mathrm{SiO}}_{2}$ spherical microcavities was calculated and probed experimentally by measuring the luminescence decay rate at 1.54 \ensuremath{\mu}m erbium ions implanted colloids. To separate effect nonradiative processes, first radiative ${\mathrm{Er}}^{3+}$ bulk determined. This done varying LDOS an Er-doped planar film bringing into contact with liquids different refractive index range $n=1.33--1.57.$ By comparing observed...

Hydrolysis of titanium(IV) isopropoxide (TTIP) is a well-known method for the fabrication TiO2. Normally it made via sol–gel reaction in presence water. In this paper we report on preparation flat TiO2 films conjugated polymer/TiO2 photovoltaic cells, from TTIP/isopropanol solution. It shown that morphological structure film strongly dependent relative humidity during spin-coating bilayer devices consisting TiO2/poly[2-methoxy-5-(3′,7′-dimethyloctyloxy)-1,4-phenylene vinylene] (MDMO-PPV),...

One of the major loss mechanisms in state art photovoltaic cells is spectral resulting from inefficient use ultraviolet photons and lack absorption infrared by solar cell. For a Si cell, e.g., losses alone result over 55% energy spectrum. Converting spectrum incoming light such that it has better match with cell can reduce losses, especially case small band, as for dye sensitized polymer cells. In this paper shown response multicrystalline silicon be enhanced application coating doped...