title: CH3NH3Pb(BF4)3and (C4H9NH3)2Pb(BF4)4Family of 3D and 2D Perovskites without and with Iodide and Bromide Ions Substitution.
abstract: We report the synthesis of fully molecular ion (BF4-)-based organic-inorganic hybrid perovskite CH3NH3Pb(BF4)3, which is a wide band gap semiconductor, and the same can be easily tuned toward the visible by the incorporation of bromide or iodide ions in the crystal framework simply by changing lead precursors. We have also successfully transformed the distorted 3D molecular-ion-induced perovskite to 2D (C4H9NH3)2Pb(BF4)4, (C4H9NH3)2PbBr(4-x)(BF4)x, and (C4H9NH3)2PbI(4-x)(BF4)xperovskites that exhibit the optical absorption over the UV to visible region. The thin films of molecular-ion-containing 2D perovskites with Br-and I-anions show blue and green luminescence, respectively, under UV illumination.
authors.affiliation: Centre of Excellence in Solar Energy, Physical and Materials Chemistry Division, CSIR-National Chemical Laboratory , Dr. Homi Bhabha Road, Pashan, Pune - 411008, Maharashtra, India.|Academy of Scientific and Innovative Research (AcSIR) , Anusandhan Bhawan, 2 Rafi Marg, New Delhi - 110 001, India.
authors.forename: Satyawan
authors.initials: S
authors.lastname: Nagane
authors.affiliation: Academy of Scientific and Innovative Research (AcSIR) , Anusandhan Bhawan, 2 Rafi Marg, New Delhi - 110 001, India.|Department of Physics and Centre for Energy Science, Indian Institute of Science Education and Research (IISER) , Dr. Homi Bhabha Road, Pune - 411 008, Maharashtra, India.
authors.forename: Satishchandra
authors.initials: S
authors.lastname: Ogale