Photoexcitation dynamics in solution-processed formamidinium lead iodide perovskite thin films for solar cell applications.

ABSTRACT: Formamidinium lead iodide (FAPbI₃) is a newly developed hybrid perovskite that potentially can be used in high-efficiency solution-processed solar cells. Here, the temperature-dependent dynamic optical properties of three types of FAPbI₃ perovskite films (fabricated using three different precursor systems) are comparatively studied. The time-resolved photoluminescence (PL) spectra reveal that FAPbI₃ films made from the new precursor (a mixture of formamidinium iodide and hydrogen lead triiodide) exhibit the longest lifetime of 439 ns at room temperature, suggesting a lower number of defects and lower non-radiative recombination losses compared with FAPbI₃ obtained from the other two precursors. From the temperature-dependent PL spectra, a phase t

SUBMITTER: Fang HH 

PROVIDER: S-EPMC6059954 | biostudies-literature | 2016 Apr

REPOSITORIES: biostudies-literature