Absorption F-sum rule for the exciton binding energy in methylammonium lead halide perovskites.

  title={Absorption F-sum rule for the exciton binding energy in methylammonium lead halide perovskites.},
  author={Nicola Sestu and Michele Cadelano and Valerio Sarritzu and Feipeng Chen and Daniela Marongiu and Roberto Piras and Marina Mainas and F. Quochi and Michele Saba and Andrea Mura and G. Bongiovanni},
  journal={The journal of physical chemistry letters},
  volume={6 22},
Advances of optoelectronic devices based on methylammonium lead halide perovskites depend on understanding the role of excitons, whether it is marginal as in inorganic semiconductors, or crucial, like in organics. However, a consensus on the exciton binding energy and its temperature dependence is still lacking, even for widely studied methylammonium lead iodide and bromide materials (MAPbI3, MAPbBr3). Here we determine the exciton binding energy based on an f-sum rule for integrated UV-vis… CONTINUE READING
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