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We studied CuInS2 (CIS) film growth using high electrostatic field assisted ultrasonic spray deposition. All the sprayed CIS films were observed to be grown with mixed ordering mode, where chalcopyrite (CH) and CuAu (CA) orderings coexisted. For the high efficiency solar cell, CH-ordered CIS film is desirable. We performed post-sulfurization for all as-sprayed films to induce recrystallization. After...
Apart from its chemical structure, mechanical properties of polymers depend mainly on polymer morphology, which is determined by the processing conditions. Exposure of the materials at elevated temperatures lead to changes in polymer morphology. The main objective of this study was to investigate the change in thermo-mechanical properties of different encapsulation materials (EVA, Ionomer) after damp...
Space bound photovoltaics utilize crystalline III-V material systems to achieve extremely high conversion efficiencies. The measure of these devices is not ultimate conversion efficiency but specific power density, which can be limited by the bulky non-contributing substrates they must be epitaxially grown on. By replacing these substrates with thin metal foil, the overall weight of the device can...
For optimizing and having reproducibility of the PV-performance of CdTe based solar cells, the quality of the CdS-partner window material plays an important role. One of the main problems to be solved consists in eliminating the pinhole density in the CdS layer, as well as its processing with the suitable geometric granularity (grain size, roughness, barrier dimensions, voids and film thickness)....
Cd1-xMgxTe is a potential candidate for the top cell in two-terminal tandem solar cells. The close match of the lattice constant of MgTe with CdTe and the apparent complete miscibility of MgTe in CdTe and the rapid increase in band gap with Mg content gives flexibility to prepare material with the appropriate band gap for current-matching in a tandem solar cell. We have chosen to deposit Cd 1-xMgx...
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