In this study, we present a new light absorption enhancement method for p-i-n thin film silicon solar cells using pyramidal surface structures, larger than the wavelength of visible light. Calculations show a maximum possible current enhancement of 45% compared with cells on a flat substrate. We deposited …

The aim of this paper is to give the reader a comprehensive approach to the topic of the emerging Regional Policy in Bulgaria and its progress. The issue gained a large scope of attention since Bulgaria started working her way to the European Union. The regional policy has a great importance for the …

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