A novel photovoltaic (PV) module for roof top systems, solar roofing, is proposed. Solar roofing is a flexible amorphous silicon (a-Si) PV sheet having the function of roofing. Tempered glass is used as a roof covering material. Technical items for roof top systems using solar roofing are discussed. Preliminary studies on module component materials show the feasibility of solar roofing. The authors design a construction technology for tempered glass covered roofs and the effects of shadows on PV modules upon its performance are also analyzed.
Device design and deposition conditions of a-Si/a-SiGe/a-SiGe triple-junction solar cells were studied. To optimize their device structure, we applied several technologies such as a-SiO:H window p-layer for top cell, low temperature deposited /spl mu/c-Si p-layer for middle/bottom cells and hydrogen-dilution technique for a-SiGe:H i-layers. As a result, we obtained 1 cm/sup 2/ cell with 11% stabilized efficiency. We found out effective deposition parameters such as increasing both hydrogen-dilution ratio and RF-power for Ge/Si>0.5. In addition, we presented newly designed apparatus for the triple-junction 40 cm/spl times/80 cm solar cells.
A new continuous method for preparing aniline from nitrobenzene by Béchamp's reduction method has been developed, using a liquid fluidized bed of iron particles induced by upward flowing liquid reaction-mixtures. Outline of the experimental apparatus is shown in Fig. 1.The rate data obtained from this small-scale continuous apparatus in Fig. 3, when compared with those by batch reduction, showed that the latter is somewhat lower than the former. Possible reasons are presented for this lowering.It has turned out from this basic survey that aniline of 99 to 99.9% purity may be prepared in industrial scale without much difficulty, using this new continuous method. Quantitative formulation of the behavior of the reactor has been developed, including reactor design of multistage type in series
A fabrication process of a double-junction amorphous silicon solar cell formed on a plastic film-substrate has been developed. The solar cell has a new monolithic series-connected structure named "SCAF" and is fabricated by a newly developed fabrication process including "Stepping-Roll" film deposition process. The details of the new process are presented and its advantage is described. We developed the new Stepping-Roll film deposition system composed of 6 CVD reactors and 2 sputtering reactors, and fabricated 109 SCAF cells successively as a pilot mass production. The results of the production are also presented and discussed.
