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J Am Chem Soc. 2018 Mar 07;140(9):3345-3351. doi: 10.1021/jacs.7b12860. Epub 2018 Feb 21.

Formation of Stable Mixed Guanidinium-Methylammonium Phases with Exceptionally Long Carrier Lifetimes for High-Efficiency Lead Iodide-Based Perovskite Photovoltaics.

Journal of the American Chemical Society

Dominik J Kubicki, Daniel Prochowicz, Albert Hofstetter, Marcin Saski, Pankaj Yadav, Dongqin Bi, Norman Pellet, Janusz Lewiński, Shaik M Zakeeruddin, Michael Grätzel, Lyndon Emsley

Affiliations

  1. Laboratory of Magnetic Resonance , Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , Switzerland.
  2. Laboratory of Photonics and Interfaces , Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne , CH-1015 Lausanne , Switzerland.
  3. Institute of Physical Chemistry , Polish Academy of Sciences , Kasprzaka 44/52 , 01-224 Warsaw , Poland.
  4. Department of Solar Energy, School of Technology , Pandit Deendayal Petroleum University , Gandhinagar 382 007 , Gujarat , India.
  5. Faculty of Chemistry , Warsaw University of Technology , Noakowskiego 3 , 00-664 Warsaw , Poland.

PMID: 29429335 DOI: 10.1021/jacs.7b12860

Abstract

Methylammonium (MA)- and formamidinium (FA)-based organic-inorganic lead halide perovskites provide outstanding performance as photovoltaic materials, due to their versatility of fabrication and their power conversion efficiencies reaching over 22%. The proposition of guanidinium (GUA)-doped perovskite materials generated considerable interest due to their potential to increase carrier lifetimes and open-circuit voltages as compared to pure MAPbI

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