Guanidinium substitution-dependent phase transitions, ionic conductivity, and dielectric properties of MAPbI3†
F. B.
Minussi, 
*a
E. B.
Araújo
a
*a
E. B.
Araújo
a
Abstract
Despite the proven enhancement of MAPbI3 optoelectronic properties and stability by guanidinium substitution, divergences persist regarding fundamental knowledge on this system. This work shows that GAxMA1−xPbI3 solid solutions have guanidinium content-dependent phase transitions, dielectric permittivities, ionic conductivities, activation energies, and relaxation times.
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