Passivation of Low-Dimensional Quasi-2D Ruddlesden-Popper Perovskite Solar Cells with Ionic Liquid

Sharma, B and Pawar, V and Patil, S and Avasthi, S (2024) Passivation of Low-Dimensional Quasi-2D Ruddlesden-Popper Perovskite Solar Cells with Ionic Liquid. In: ACS Applied Energy Materials, 7 (21). 10163 -10170.

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Abstract

Quasi-2D Ruddlesden-Popper (RP) perovskites are more stable but yield a lower efficiency than 3D perovskites. This paper shows that an ionic liquid interlayer can improve the efficiency and stability of low-dimensional 2D PEA2MA4Pb5I16 (n = 5) perovskites. Adding ionic liquid BMIMBF4 at the interface with PEDOT:PSS boosts the power conversion efficiency (PCE) from 9.73 to 10.94. The ionic liquid passivates the perovskite interface, reducing recombination losses and enhancing the short-circuit current (Jsc) from 13.42 to 15.92 mA/cm2. The devices with the ionic liquid are also more stable. Compared to standard devices, which retain just 75 of their initial PCE after 4000 h, the ionic-liquid-treated devices maintain 92 of their initial PCE when stored inside a glovebox in the dark. The films with the ionic liquid show only marginal degradation after 240 min of continuous exposure at 80 °C in air. This study presents a promising approach to achieve high efficiency and stability in low-dimensional perovskite solar cells. © 2024 American Chemical Society.

Item Type:	Journal Article
Publication:	ACS Applied Energy Materials
Publisher:	American Chemical Society
Additional Information:	The copyright for this article belongs to publisher.
Keywords:	Boron compounds; Interfaces (materials); Mendelevium; Selenium compounds, BMIMBF4; Low dimensional; Low-dimensional perovskite; PEDOT/PSS; Power conversion efficiencies; Quasi-2d; Recombination loss; Ruddlesden-Popper; Ruddlesden�popper perovskite; Short-circuit currents, Perovskite
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited:	26 Nov 2024 12:00
Last Modified:	26 Nov 2024 12:00
URI:	http://eprints.iisc.ac.in/id/eprint/86909

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