Synthesis and dielectric characterisation of triiodide perovskite methylammonium lead iodide for energy applications

Impedance spectroscopic measurements on spin coated 550 nm thick perovskite films sandwiched between titanium oxide (TiO 2 ) deposited on fluorine doped tin oxide (FTO) glass substrates and with a platinum (Pt) counter electrode have been performed to determine the influence of the percentage of PbI...

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Bibliographic Details
Published in:Journal of materials science. Materials in electronics 2018-11, Vol.29 (21), p.18693-18698
Main Authors: Mahapatra, S. K., Saykar, N., Banerjee, I., Hobson, P. R., Sharma, A. K., Ray, A. K.
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Chemistry and Materials Science
Fluorine
Glass substrates
Materials Science
Optical and Electronic Materials
Perovskite structure
Perovskites
Platinum
Thick films
Tin oxides
Titanium dioxide
Titanium oxides
Weight
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Summary:Impedance spectroscopic measurements on spin coated 550 nm thick perovskite films sandwiched between titanium oxide (TiO 2 ) deposited on fluorine doped tin oxide (FTO) glass substrates and with a platinum (Pt) counter electrode have been performed to determine the influence of the percentage of PbI 2 in methylammonium lead iodide (CH 3 NH 3 PbI 3 ) compounds. These compounds with perovskite structure have been synthesized by weaving methylammonium iodide (CH 3 NH 3 I) and lead iodide (PbI 2 ) in two different weight ratios of 1:4 and 3:7. The surface grains are found from the scanning electron microscoping images to have become relatively larger with increasing PbI 2 content in spincoated perovskite film. Nearly 2% increase in optical band gap has been observed with increasing weight ratio of PbI 2 content from 1:4 to 3:7.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-018-9992-1