3 research outputs found
Partial coverage methylammonium lead bromide films for solar cell application
Hybrid perovskite compounds as methylammonium lead halides are currently been
investigated for different optoelectronic applications. CH3NH3PbBr3 is a promising
member because of its electronic structure and large bandgap that gives rise to a high
open circuit voltage. Although higher performances can result by using sophisticated
processing, one-step methods are particularly interesting because of their easy
implementation. Solar cells based on CH3NH3PbBr3 are fabricated using one-step spin
coating deposition. Remarkable effect on the morphological, structural, optical and
electrical properties is observed by changing the molar ratio of the precursors. Dual
film morphology, with micrometer-size CH3NH3PbBr3 crystals embedded in a
mesoporous TiO2 background, explains minimal shunting paths and open-circuit
voltage reduction. Full perovskite coverage of TiO2 background is not necessary for
proper operation