Guanine-Stabilized Formamidinium Lead Iodide Perovskites

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Guanine-Stabilized Formamidinium Lead Iodide Perovskites

Journal Article (2020)

Author(s)

Li Hong (École Polytechnique Fédérale de Lausanne, Wuhan NationalLab for Optoelectronics, Hubei)

Jovana V. Milić (École Polytechnique Fédérale de Lausanne)

Paramvir Ahlawat (École Polytechnique Fédérale de Lausanne)

Marko Mladenović (École Polytechnique Fédérale de Lausanne)

Dominik J. Kubicki (École Polytechnique Fédérale de Lausanne)

Farzaneh Jahanabkhshi (École Polytechnique Fédérale de Lausanne)

Dan Ren (École Polytechnique Fédérale de Lausanne)

María C. Gélvez-Rueda (TU Delft - ChemE/Opto-electronic Materials)

Ferdinand C. Grozema (TU Delft - ChemE/Opto-electronic Materials)

undefined More Authors (External organisation)

Solid-state NMR Perovskite solar cells Low-dimensional perovskites Guanine Hybrid perovskites

DOI related publication

https://doi.org/10.1002/anie.201912051 Final published version

To reference this document use

https://resolver.tudelft.nl/uuid:ff2afe43-422e-458e-a966-07e49f85c775

More Info

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Publication Year

2020

Language

English

Issue number

12

Volume number

59

Pages (from-to)

4691-4697

Downloads counter

163

Abstract

Formamidinium (FA) lead iodide perovskite materials feature promising photovoltaic performances and superior thermal stabilities. However, conversion of the perovskite α-FAPbI₃ phase to the thermodynamically stable yet photovoltaically inactive δ-FAPbI₃ phase compromises the photovoltaic performance. A strategy is presented to address this challenge by using low-dimensional hybrid perovskite materials comprising guaninium (G) organic spacer layers that act as stabilizers of the three-dimensional α-FAPbI₃ phase. The underlying mode of interaction at the atomic level is unraveled by means of solid-state nuclear magnetic resonance spectroscopy, X-ray crystallography, transmission electron microscopy, molecular dynamics simulations, and DFT calculations. Low-dimensional-phase-containing hybrid FAPbI₃ perovskite solar cells are obtained with improved performance and enhanced long-term stability.