Showing papers in "Solar Energy Materials and Solar Cells in 1997"

TL;DR: In this article, the X-ray diffraction pattern of CZTS thin films showed that these films had a stannite structure, and the optical band gap energy was estimated as 1.45 eV.

TL;DR: In this paper, an energy distribution of electrons in the conduction band and holes in the valence band is described by a single Fermi distribution with no splitting of quasi-Fermi-energies, but with a temperature different from the lattice temperature.

TL;DR: In this paper, textured textured WS2 and MoS2 films are obtained by the techniques of reactive sputtering and solid state reaction, as long as the substrates used are each coated with a 10-20 nm Ni layer.

TL;DR: In this paper, the effect of substrate temperature on the optoelectronic properties of ZnO-based thin films prepared by rf magnetron sputtering has been studied and compared in order to compare resulting samples and try to reduce the substrate temperature down to room temperature.

TL;DR: In this article, the authors designed and constructed a photovoltaic-thermal hybrid collector on campus, which consisted of a liquid heating flat-plate solar collector with mono-Si PV cells on substrate of nonselective aluminum absorber plate, the collector area was 1.3 × 0.5 m.

TL;DR: In this paper, a reactive ion etching method has been applied to form a surface texture of multicrystalline silicon solar cells in order to reduce the surface reflectance, which has a pyramid-like shape, and aspect ratio of which can be easily controlled by the gas flow ratio.

TL;DR: In this article, a consistent picture of the problems encountered in the case of wide-gap absorbers is drawn on the basis of results from photoelectron spectroscopy in conjunction with electrical measurements on the devices.

TL;DR: In this paper, the daily watt-hour efficiency and daily integrated output power (P Wh ) of the a-Si and poly-Si modules have been used to examine the performances of both modules on the basis of two years' data accumulated at outdoor conditions.

TL;DR: In this article, surface sulfurization was developed as a technique for fabricating efficient ZnO : Al/CdS/graded Cu(In,Ga)Se2/Mo/glass solar cells.

TL;DR: In this paper, the grain-boundary trapping model was applied for CVD polysilicon to hydrogenated microcrystalline silicon deposited by VHF plasma, and an upper limit for the average defect density of around 2 × 1016/cm3 could be deduced.

TL;DR: In this article, the authors developed a multirough-interface optical model which was used for calculating the absorption profiles in the tandem cells and investigated the influence of light scattering and thickness of the intrinsic layer of the bottom cell on the optimal ratio i2/i1 between the thicknesses of bottom (i2) and top (i1) intrinsic layers in the current matched cell.

TL;DR: In this paper, reactive ion etching (RIE) has been applied and developed as a method for texturing polycrystalline silicon solar cells, two structures (microgrooves and pyramids) were produced in this work.

TL;DR: In this article, a linear correlation between performance ratio and the yearly average daytime temperature at a site is observed, and the variation of the module performance ratio with yearly or monthly irradiation sums and average temperatures is given.

TL;DR: In this article, the effects of the metal particles on the dye sensitization of the electrodes were discussed in terms of band edge fluctuation induced by the surface metal particles, Schottky barriers at TiO 2 /metal interfaces, and surface plasma resonance.

TL;DR: In this article, the authors describe the methodology for quantification of solar irradiance fluctuation in order to analyze the areally totalized PV systems, which consist of a large number of PV systems connected to each other in the optimum size of a certain community area.

TL;DR: In this paper, it was shown that in combination with a bias light, the surface passivation of 0.08 molar ethanol/iodine solution can be of superior quality compared to thermally grown passivating oxides.

TL;DR: In this article, rare-earth complexes were used as photovoltaic precursors, and the conversion efficiency of solar cells were improved by applying rare earth complexes as photoprocessors.

TL;DR: The methodology developed for on-site measurements of PV array characteristics and for system monitoring, comprising the collection, analysis and presentation of operational data, in support of these programmes is presented in this article.

TL;DR: In this paper, the grain size distribution in solid-phase crystallized Si films on glass for use in polycrystalline Si thin-film solar cells was investigated, and it was shown that the average grain size strongly depends on the substrate type, increases with the deposition rate of the amorphous film and is independent of the film thickness.

TL;DR: In this article, the authors describe the development of multicrystalline silicon (mc-Si) solar cells at laboratory level to improve process technology, growth methods, and material improvement techniques to deliver better devices at lower cost.

TL;DR: In this article, single-crystalline silicon (c-Si) photovoltaic (PV) cells and residential PV systems using off-grade silicon supplied from semiconductor industries were evaluated from a life cycle point of view.

TL;DR: In this article, the photo-current-response measurement (PCR) method was used for the investigation of capacitance effects and the diffusion capacitance as experimental results achieved by the PCR-method.

TL;DR: Shallow junction multicrystalline Si solar cells have been processed by an anodical etching technique and more than 25% improvement in short-circuit current and photovoltaic energy conversion efficiency was demonstrated.

TL;DR: In this article, a camphoric carbon solar cell was made and a preliminary investigation of photovoltaic characteristics of a cell of configuration Bdoped C (100 nm)/P-doped c (100nm)/n-Si (380 μm) by electron beam deposition reveal short-circuit current of 1.2 mA cm−2 and an open circuit voltage of 102 mV with fill factor of 0.82, at AM1 condition.

TL;DR: In this paper, high performance Cu(InGa)Se2 (CIGS) thin-film absorbers with an intentionally graded band-gap structure have been fabricated by a simple two-stage method using In/CuGa/Mo stacked precursors and H2Se gas.

TL;DR: In this article, two independent experiments are described that were performed on samples of EVA-laminated photovoltaic modules which form part of a grid-connected PV system in the Negev desert.

TL;DR: In this paper, the authors describe characteristics evaluation of the power conditioner which has the function of Maximum Power Point Tracking (MPPT) by "mountain climbing method" through computer simulations.

TL;DR: In this paper, the performance of CIGS thin-film solar cells using evaporated InxSey and ZnInxSiSey buffer layers was investigated and the relationship between the cell performance and the substrate temperature for these buffer layers is demonstrated.

TL;DR: In this paper, the effect of defect states in the defect-chalcopyrite layer and at the CdS/defect-chal copyrite interface on the blocking currentvoltage behavior of ZnO/CdS, Cu(In,Ga)Se2/Mo solar cells was examined using a comprehensive numerical device simulator.

TL;DR: In this paper, it was shown that the electrical properties of ZnO films strongly depend on the injected amount of B 2 H 6 during the deposition and on the injection timing of B2 H 6 relating to DEZn and H 2 O.