Publications associated with Photovoltaic and Optoelectronic Device Group

Charge-Carrier Dynamics and Mobilities in Formamidinium Lead Mixed-Halide Perovskites.

Advanced materials (Deerfield Beach, Fla.) 27 (2015) 7938-7944

W Rehman, RL Milot, GE Eperon, C Wehrenfennig, JL Boland, HJ Snaith, MB Johnston, LM Herz

The mixed-halide perovskite FAPb(Bry I1-y )3 is attractive for color-tunable and tandem solar cells. Bimolecular and Auger charge-carrier recombination rate constants strongly correlate with the Br content, y, suggesting a link with electronic structure. FAPbBr3 and FAPbI3 exhibit charge-carrier mobilities of 14 and 27 cm(2) V(-1) s(-1) and diffusion lengths exceeding 1 μm, while mobilities across the mixed Br/I system depend on crystalline phase disorder.

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