| Literature DB >> 33442979 |
Michael A Hope1, Toru Nakamura2,3, Paramvir Ahlawat4, Aditya Mishra1, Manuel Cordova1, Farzaneh Jahanbakhshi4, Marko Mladenović4, Rashmi Runjhun2,5, Lena Merten6, Alexander Hinderhofer6, Brian I Carlsen7, Dominik J Kubicki1, Renana Gershoni-Poranne8, Thomas Schneeberger2, Loï C Carbone2, Yuhang Liu2, Shaik M Zakeeruddin2, Janusz Lewinski5, Anders Hagfeldt7, Frank Schreiber6, Ursula Rothlisberger4, Michael Grätzel2, Jovana V Milić2, Lyndon Emsley1.
Abstract
The use of layered perovskites is an important strategy to improve the stability of hybrid perovskite materials and their optoelectronic devices. However, tailoring their properties requires accurate structure determination at the atomic scale, which is a challenge for conventional diffraction-based techniques. We demonstrate the use of nuclear magnetic resonance (NMR) crystallography in determining the structure of layered hybrid perovskites for a mixed-spacer model composed of 2-phenylethylammonium (PEA+) and 2-(perfluorophenyl)ethylammonium (FEA+) moieties, revealing nanoscale phase segregation. Moreover, we illustrate the application of this structure in perovskite solar cells with power conversion efficiencies that exceed 21%, accompanied by enhanced operational stability.Entities:
Year: 2021 PMID： 33442979 DOI： 10.1021/jacs.0c11563
Source DB: PubMed Journal: J Am Chem Soc ISSN： 0002-7863 Impact factor: 15.419