title: CH3NH3PbI3, A Potential Solar Cell Candidate: Structural and Spectroscopic Investigations.
abstract: Hybrid organic-inorganic metal halides of the type CH3NH3PbX3have emerged as potential materials for photovoltaic applications. In this paper we discuss structural, electronic, and optical spectroscopy investigations performed on high quality single crystals of CH3NH3PbI3. Our results conclusively suggest that CH3NH3PbI3crystallizes in centrosymmetric space group and the methylammonium moiety exhibits disordered packing at room temperature. Extracted values of the exciton binding energy, the electron-phonon coupling constant, and the schematic energy level diagram constructed from the emission broadening, Raman, and photoemission spectroscopy measurements clearly show the potential of this system in photovoltaic applications.
authors.affiliation: Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India.|Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India.
authors.forename: Pronoy
authors.initials: P
authors.lastname: Nandi
authors.affiliation: Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India.
authors.forename: Chandan
authors.initials: C
authors.lastname: Giri
authors.affiliation: Elettra-Sincrotrone Trieste, Strada Statale 14, Km 163.5, 34149 Basovizza, Trieste, Italy.
authors.forename: Boby
authors.identifier: http://orcid.org/0000-0002-3334-7540
authors.initials: B
authors.lastname: Joseph
authors.affiliation: School of Basic Sciences, Indian Institute of Technology , Bhubaneswar 751013, Odisha, India.
authors.forename: S
authors.initials: S
authors.lastname: Rath
authors.affiliation: CSIR-Institute of Minerals and Materials Technology, Bhubaneswar 751013, Odisha, India.
authors.forename: U
authors.initials: U
authors.lastname: Manju
authors.affiliation: Institute of Physics, Sachivalaya Marg, Bhubaneswar 751005, Odisha, India.|Homi Bhabha National Institute, Training School Complex, Anushakti Nagar, Mumbai 400085, India.
authors.forename: D
authors.identifier: http://orcid.org/0000-0003-1486-8348
authors.initials: D
authors.lastname: Topwal