Open AccessMicrostructured CH3NH3PbI3 films for Efficient Solar Cells under Ambient Conditions
Author(s) -
Pronoy Nandi,
Chandan Giri,
D. Topwal
Publication year - 2020
Publication title -
international journal of innovative research in physics
Language(s) - English
Resource type - Journals
eISSN - 2689-484X
pISSN - 2687-7902
DOI - 10.15864/ijiip.1401
Subject(s) - materials science , crystallization , chemical engineering , nucleation , iodide , energy conversion efficiency , perovskite (structure) , morphology (biology) , solar cell , boiling point , mesoporous material , nanotechnology , inorganic chemistry , optoelectronics , chemistry , organic chemistry , biology , engineering , genetics , catalysis
We demonstrate antisolvent vapor assisted diffusion as a unique technique for controlled nucleation and better crystallization of methylammonium lead iodide, perovskite absorber film for solar cell applications. Our observations also suggest that due to non-covalent weak interaction between the perovskite absorber and the high boiling point antisolvent, Ethylacetate (EA), a new microstructured morphology (micro-rods) evolves in the film, which we report for the first time. It is believed that the changed morphology of the mesoporous films for the high boiling point antisolvent, exhibits better fill factor and results in 32% enhancement of power conversion efficiency than the low boiling point antisolvent, Dichloromethane (DCM), diffused and as-deposited films, thereby suggesting one more parameter to achieve better device performance.