Berlin 2024 – scientific programme
Parts | Days | Selection | Search | Updates | Downloads | Help
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Hybrid and Perovskite Photovoltaics I
CPP 33.6: Talk
Wednesday, March 20, 2024, 17:45–18:00, H 0106
CTAB assisted solvent-free mechanosynthesis of MAPbX3 nanocrystals: Stability, and photoresponse — •Gaurav Nim1, Parul Bansal2, and Prasenjit Kar2 — 1Department of Physics and Material Sciences Center, Philipps-Universität Marburg, Germany — 2Department of Chemistry, Indian Institute of Technology Roorkee, India
In this work, hybrid metal halide perovskite, or HPs (MAPbX3, X = Br, I), was produced exclusively using multifunctional cetyl trimethylammonium bromide (CTAB) and the mechano-synthesis technique.* Equimolar amounts of MAX and PbX2 combined with a mmol quantity of CTAB were used to synthesize HPs. We did steady-state photoluminescence, X-ray diffraction (XRD), and time-correlated single-photon count (TCSPC) to look at the optical and structural properties of perovskite. The thermogravimetric analysis informs us about the thermal stability of the nanocrystals. X-ray diffraction analysis reveals that mechanochemically synthesized HPs show high crystallinity and phase purity, with stability over a period of time. The photoinduced current response of the perovskite reveals an excellent increase in photoconductivity when exposed to light (with a 1 V bias). The device fabricated of perovskite witnessed prompt photoresponse under light illumination and temporally stable photocurrent over multiple cycles of light irradiation. Due to their phase purity, low bandgap, nanoscale size, long-term stability, and easy-to-synthesis approach, the synthesized materials are useful for photovoltaic applications.
Keywords: Metal halide perovskite; CTAB; Mechanosynthesis; Stability; Photoresponse