Abstracts Book - IMRC 2018

• SF2-P023
ELECTRICAL, OPTICAL, AND STRUCTURAL PROPERTIES OF
SOLUTION - PROCESSED FORMAMIDINIUM LEAD IODIDE (FAPbI3)
PEROVSKITES
Karthick Sekar 1 , Jorge Sergio Narro Rios 2 , Srikanth Chakaravarthy 1 , Luisa Fernanda Salazar
Rivera 2 , Velumani Subramaniam 2
1 Centro de Investigación y de Estudios Avanzados del IPN - CINVESTAV, Nanoscience and
Nanotechnology, Mexico. 2 Centro de Investigación y de Estudios Avanzados del IPN -
CINVESTAV, Electrical Engineering (SEES), Mexico.
The ever-increasing demand for capturing the abundant solar energy enforcing
the researchers to develop new materials with better photovoltaic conversion
efficiencies (PCE). The perovskites, which are represented as ABX 3 , where A
(CH 3 NH 3 (MA), HC(NH 2 ) 2 (FA), Cs), B (Pb, Sn), X (I, Br, Cl), are the new members of
the photovoltaics group. Among these, the formamidinium lead iodide
(HC(NH 2 ) 2 PbI 3 - FAPbI 3 ) perovskite is one of the promising candidates for using,
as an absorber layer, in the organic-inorganic halide perovskite solar cells
(OIHPSC) and in optoelectronics. Owing to the smaller bandgap (1.48 eV) of the
larger organic cation, formamidinium (HC(NH 2 ) 2 ), the FAPbI 3 perovskite has a
wider absorption range and a higher thermal stability when compared to that of
methylammonium (CH 3 NH 3 - 1.55 eV) and the cesium (Cs - 1.76 eV) cation-based
perovskites. Herein, we first discuss the synthesis and characterization of
formamidinium iodide (FAI) compound. The synthesized FAI compound would
be used as a precursor, along with PbI 2 in varying stoichiometry, to obtain the
FAPbI 3 perovskite. The resultant materials would be structurally, electrically, and
optically characterized, at room temperature, to understand the synthesis
mechanism and properties of FAPbI 3 perovskites.
Keywords: Formamidinium lead iodide, solution-process, structural, electrical, and
optical properties.
Presenting authors email: s.karthick.dsc@gmail.com