Proceedings of Technological Advances in Science, Medicine and Engineering Conference 2021

Less Toxic Absorbing layers for Environmental Free Perovskite Solar Cells
Pavithrakumar Palanichamy, Selvakumar Pitchaiya, Jayaprakash Madhu, Agilan Santhanam, Muthukumarasamy Natarajan, Dhayalan Velauthapillai
Abstract

The unique crystal structure (ABX3) (A-Monovalent Cation, B – Divalent Cation, X-Halogen anion) of Perovskits in solar cells (PSC) shows highest power conversion efficiency (PCE) in cost-effective photovoltaic. This solution processable solar device holds the research field by its expeditious increase in its PCE from 3.9 to 25 % within a few years. This highest PCE can obtained by only lead (Pb) based light absorbing material; although, chemical instability and environmental hazards of lead are still a big challenge. Stability can be improved by modifying the halogen anions (Cl-, Br- and I-) and exchanging divalent cation (CH3NH3I) and introducing interfacial layers. Even the percentage of lead consumption in perovskite is low; it causes more harm to the environment and also acts as a carcinogenic agent for humans due to its water solubility and chemical instability. Towards lead-free perovskite solar cells, we made a try of doping divalent metals with the Pb as an absorbing layer and analyzed its structural changes and improved photovoltaic behavior. The absorbance of the active layer is analyzed by UV-Visible spectrophotometer. X-Ray Diffractometer result confirmed the structure of perovskite.  FESEM images clearly showed the morphology of the active layer. I-V characteristics of fabricated PSC device have been analyzed by Keithley Source Meter – 2450.


Last modified: 2021-06-30
Building: TASME Center
Room: Science Hall
Date: July 3, 2021 - 02:50 PM – 03:00 PM

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