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High open circuit voltage (VOC) is a potential benefit of thin silicon solar cells. A new thin silicon solar cell structure is proposed using silicon-on-insulator (SOI) technology that investigates the properties of high voltage in thin silicon designs with an epitaxial emitter. Key design parameters are low rear and front surface recombination, low dark current and efficient light trapping. We propose...
Solar modules made from thin-film crystalline-silicon layers of high quality on glass substrates could lower the price of photovoltaic electricity substantially. One possibility is to use polycrystalline-silicon thin films, but the difficulty of this approach is to obtain a sufficiently high material quality and to achieve an effective passivation of the numerous grain boundaries. However, the utilization...
A piezoelectric ultrasonic hydrophone array was fabricated using diaphragm transducer on Si substrates. A two dimensional (2-D) array of 8 times 8 elements with diaphragm transducer has been developed by XeF2 etching from the topside of Si. In this paper, we describe the fabrication process of the diaphragm transducer array. A finite-element analysis (FEA) was calculated to evaluate the resonant frequency...
Thin film single crystal silicon on foreign substrate is an attractive way to realize cheap and efficient photovoltaic devices. In this paper, we focus on the realisation of porous silicon sacrificial layer and subsequent epitaxial growth obtained with VPE and LPE. Porous silicon is elaborated by electrochemical anodisation of monocrystalline silicon. The sample is annealed under H/sub 2/ flow in...
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