CH₃NH₃PbI₃ grain growth and interfacial properties in meso-structured perovskite solar cells fabricated by two-step deposition.

ABSTRACT: Although the two-step deposition (TSD) method is widely adopted for the high performance perovskite solar cells (PSCs), the CH₃NH₃PbI₃ perovskite crystal growth mechanism during the TSD process and the photo-generated charge recombination dynamics in the mesoporous-TiO₂ (mp-TiO₂)/CH₃NH₃PbI₃/hole transporting material (HTM) system remains unexploited. Herein, we modified the concentration of PbI₂ (C_(PbI2)) solution to control the perovskite crystal properties, and observed an abnormal CH₃NH₃PbI₃ grain growth phenomenon atop mesoporous TiO₂ film. To illustrate this abnormal grain growth mechanism, we propose that a grain ripening pro

SUBMITTER: Yao Z 

PROVIDER: S-EPMC5402745 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature