R. A.  Naphade, Zhao, B., Richter, J. M., Booker, E., Krishnamurthy, S., Friend, R. H., Sadhanala, A., and Ogale, S. B., ?High quality hybrid perovskite semiconductor thin films with remarkably enhanced luminescence and defect suppression via quaternary alkyl ammonium salt based treatment?, Advanced Materials Interfaces, 2017.