Mixed organic-inorganic halide perovskites have been reported to have superior performances and unique features [2, 3] when used as light harvesters in photovoltaics. Interestingly, they can undergo several assembling procedures like sensitization and thin-film architecture. The latter one has been anyway recently reported to be affected by a noticeable hysteresis in the J - V curves at slow scan rate. No conclusive reasons for such behaviour have been provided so far. By means of an ab-initio campaign of calculations, we predict possible chemical solutions based on the replacement of the widely employed methylammonium (MA =CH3NH3+) cation with cations with reduced dipole moment, thus less sensitive to any applied external bias.
Organic-inorganic hybrid lead iodide perovskite with zero-dipole-moment guanidinium (GA=[C (NH2) 3]+) cations: a Density Functional based analysis
GIORGI, Giacomo;
2015
Abstract
Mixed organic-inorganic halide perovskites have been reported to have superior performances and unique features [2, 3] when used as light harvesters in photovoltaics. Interestingly, they can undergo several assembling procedures like sensitization and thin-film architecture. The latter one has been anyway recently reported to be affected by a noticeable hysteresis in the J - V curves at slow scan rate. No conclusive reasons for such behaviour have been provided so far. By means of an ab-initio campaign of calculations, we predict possible chemical solutions based on the replacement of the widely employed methylammonium (MA =CH3NH3+) cation with cations with reduced dipole moment, thus less sensitive to any applied external bias.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
