High-Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on Amphiphile-Modified CH3 NH3 PbI3

Dongqin Bi; Peng Gao; Rosario Scopelliti; Emad Oveisi; Jingshan Luo; Michael Grätzel; Anders Hagfeldt; Mohammad Khaja Nazeeruddin

doi:10.1002/adma.201505255

High-Performance Perovskite Solar Cells with Enhanced Environmental Stability Based on Amphiphile-Modified CH3 NH3 PbI3

Adv Mater. 2016 Apr 20;28(15):2910-5. doi: 10.1002/adma.201505255. Epub 2016 Feb 16.

Authors

Dongqin Bi¹, Peng Gao², Rosario Scopelliti³, Emad Oveisi⁴, Jingshan Luo³, Michael Grätzel³, Anders Hagfeldt¹, Mohammad Khaja Nazeeruddin²

Affiliations

¹ Laboratory of Photomolecular Science, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
² Group for Molecular Engineering of Functional Materials, EPFL Valais Wallis, Rue de l'industrie 17, CH-1951, Sion, Switzerland.
³ Laboratory of Photonics and Interfaces, Ecole Polytechnique Fédérale de Lausanne, Station 6, CH-1015, Lausanne, Switzerland.
⁴ Interdisciplinary Centre for Electron Microscopy, Ecole Polytechnique Fédérale de Lausanne, Station 12,, CH-1015, Lausanne, Switzerland.

PMID: 26880116
DOI: 10.1002/adma.201505255

Abstract

A new aliphatic fluorinated amphiphilic additive is added to CH3 NH3 PbI3 perovskite to tune the morphology and enhance the environmental stability without sacrificing the performance of the devices. Judicious screening of the perovskite precursor solution realizes a power conversion efficiency of 18.0% for mesoporous perovskite solar cells as a result of improved surface coverage. A slower degradation in ambient air is observed with this modified perovskite.

Keywords: amphiphilic additives; perovskite phases; perovskite solar cells; stability<.

Publication types

Research Support, Non-U.S. Gov't