engleski

Band gap engineering in perovskites as solar cell buffer layers

Hybrid halide perovskites have recently attracted attention as materials for solar energy conversion. Devices’ power conversion efficiency (PCE) has swiftly increased to over 19% during the past several years1-4. For this reason, they present the most promising candidate for the third generation solar cell. An indispensable part of solar cells is the buffer layer. Many inorganic perovskites (of structure XYO3, X = Ca, Mg, Sr, Ba ; Y = Mn, Tc, Re) have eminent photoelectric properties5- 8 . Because of their low price, nontoxicity, chemical and thermal stability and oxidation resistance in the air, we have simulated their electronic properties (using reliable quantum- mechanical alculations) for direct applications in solar cells based on hybrid halide perovskites. The best material for use in the solar cell buffer layer was identified by comparing the electronic band structure, HOMO and LUMO levels, with known levels of other hybrid halide perovskites, such as CH3NH3PbI3.

perovskites ; solar cells

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