Defect Passivation through (α-Methylguanido)acetic Acid in Perovskite Solar Cell for High Operational Stability.

Content Provider	Europe PMC
Author	Kim, Guan-Woo Min, Jihyun Park, Taiho Petrozza, Annamaria
Copyright Year	2022
Abstract	Defectpassivation has become essential in improving efficiencyand stability in perovskite solar cells. Here, we report the use of(α-methylguanido)acetic acid, also known as creatine, as a passivationmolecule. It is employed both as an additive and as a surface passivationlayer of perovskite thin films, given its multiple functional groups,which could address different defect sites, and its size, which couldinherently affect the material structure. We prove that the surfacepassivation is more efficiently working by removing vulnerable defectson the surface. Hole and electron defect densities were reduced, leadingto the highest power conversion efficiency of 22.6%. In addition,it can effectively protect the perovskite thin film and improve theoperational stabilities in high thermal (85 °C) and humid conditions(50% relative humidity), suggesting a strong stability of the surfacepassivation layer.
ISSN	19448244
Journal	ACS Applied Materials & Interfaces
Volume Number	14
PubMed Central reference number	PMC9100480
Issue Number	18
PubMed reference number	35476422
e-ISSN	19448252
DOI	10.1021/acsami.2c00231
Language	English
Publisher	American Chemical Society
Publisher Date	2022-04-27
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2022 The Authors. Published by American Chemical Society
Subject Keyword	perovskite solar cell 2D perovskite passivation methods stability
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Medicine Materials Science