Tailoring pyridine bridged chalcogen-concave molecules for defects passivation enables efficient and stable perovskite solar cells
University of Electronic Science and Technology of China · Lanzhou University · +5 more institutions
Abstract
Suppressing deep-level defects at the perovskite bulk and surface is indispensable for reducing the non-radiative recombination losses and improving efficiency and stability of perovskite solar cells (PSCs). In this study, two Lewis bases based on chalcogen-thiophene (n-Bu4S) and selenophene (n-Bu4Se) having tetra-pyridine as bridge are developed to passivate defects in perovskite film. The uncoordinated Pb2+ and iodine vacancy defects can interact with chalcogen-concave group and pyridine group through the formation of the Lewis acid-base adduct, particularly both the defects can be surrounded by concave molecules, resulting in effective suppression charge recombination. This approach enables a power…
Citation impact
- FWCI
- 32.55
- Percentile
- 100%
- References
- 52
Authors
9- MAMuhammad AzamCorresponding
University of Electronic Science and Technology of China
- YMYao Ma
Lanzhou University
- BZBoxue Zhang
Centre National de la Recherche Scientifique, Chimie ParisTech, Université Paris Sciences et Lettres, Institut de Recherche de Chimie Paris
- XSXiangfeng Shao
Lanzhou University
- ZWZhongquan Wan
University of Electronic Science and Technology of China, National Engineering Research Center of Electromagnetic Radiation Control Materials
Topics & keywords
- Passivation
- Chalcogen
- Perovskite (structure)
- Energy conversion efficiency
- Materials science
- Carrier lifetime
- Lewis acids and bases
- Optoelectronics
- Affordable and clean energy