| dc.description.abstract | Organometallic halide perovskite solar cells have developed as one of the most promising
contenders for the production of solar cells. The generic perovskite (PS) structure ABX3
allows manufacturing a broad range of PS materials by simple modification of building
blocks A, B, and X (A = organic group, B = metal, and X = halide). The preparation of a
series of solution-processed solar cells based on methylammonium (MA) lead halide
derivatives, CH3NH3PbX3 (X=Cl, Br, and I) has been reported. These solar cells showed
tunable optical properties depending on the nature and ratio of the halides employed. The
photovoltaic performance of perovskite solar cells is dependent on the absorption of the light
spectrum. The photovoltaic performance can be improved by widening the light absorption
towards the near infrared spectrum. A panchromatric material that absorbs all the light from
the ultra-visible to near infrared of the solar spectrum is an ideal photoactive layer. The
optimal bandgap for single junction solar cells is known to be 1.1 and 1.4 eV. However, the
bandgaps of methylammonium lead trihalide perovskites are beyond this range, and this
inspired the realization of the lower bandgap perovskites. | |
