Process technology development of perovskite based solar cell structures

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Supervisor:
Dr. Plesz Balázs
Department of Electron Devices

In my thesis work, I assembled, measured and studied perovskite based solar cells.

In the past few decades, numerous researches emerged involving new types of solar cells. The basic concept is to find an alternative to conventional silicon solar cells, using cheap materials and simple processing technologies. The most rapidly developing contender in this field is the perovskite solar cell, which uses methyl-ammonium-lead-iodide (CH3NH3PbI3) as the photoactive layer. ,,Perovskite" refers to the crystal sructure of the photoactive material: perovskites are materials with the chemical structure: ABX3, where 'A' and 'B' are two cations of very different sizes, and X is an anion that bonds to both. These materials have numerous interesting properties and with the tuning of their composition, these properties can be modified.

Perovskite solar cells developed from dye-sensitized solar cells, but today their efficiency has exceeded that of DSSCs. In the past few years, their maximum efficiency has jumped from 3.8% to 20.1%, which shows just how promising the results are.

During my thesis work, I assembled perovskite solar cells with different structures, measured them and looked for solutions to the problems that came up during the experiments. I studied the effect of the different layers on the properties of the devices, and I compared the results to those which I found in relating publications.

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