Guanine‐Stabilized Formamidinium Lead Iodide Perovskites
Article 2019 en
Authors
HL
Hong Li
JM
Jovana V. Milić
PA
Paramvir Ahlawat
Abstract
1 min read
Formamidinium (FA) lead iodide perovskite materials feature promising photovoltaic performances and superior thermal stabilities. However, conversion of the perovskite α-FAPbI<sub>3</sub> phase to the thermodynamically stable yet photovoltaically inactive δ-FAPbI<sub>3</sub> 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-FAPbI<sub>3</sub> 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 FAPbI<sub>3</sub> perovskite solar cells are obtained with improved performance and enhanced long-term stability.
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Li Hong, Jovana V. Milić, Paramvir Ahlawat, Marko Mladenović, Dominik J. Kubicki, Farzaneh Jahanbakhshi, Dan Ren, María C. Gélvez‐Rueda, Marco Alejandro Ruiz Preciado, Amita Ummadisingu, Yuhang Liu, Chengbo Tian, Linfeng Pan, Shaik M. Zakeeruddin, Anders Hagfeldt, Ferdinand C. Grozema, Ursula Röthlisberger, Lyndon Emsley, Hongwei Han, Michael Graetzel
Li Hong, Jovana V. Milić, Paramvir Ahlawat, Marko Mladenović, Dominik J. Kubicki, Farzaneh Jahanbakhshi, Dan Ren, María C. Gélvez‐Rueda, Marco Alejandro Ruiz Preciado, Amita Ummadisingu, Yuhang Liu, Chengbo Tian, Linfeng Pan, Shaik M. Zakeeruddin, Anders Hagfeldt, Ferdinand C. Grozema, Ursula Röthlisberger, Lyndon Emsley, Hongwei Han, Michael Graetzel
María C. Gélvez‐Rueda, Paramvir Ahlawat, Lena Merten, Farzaneh Jahanbakhshi, Marko Mladenović, Alexander Hinderhofer, M. Ibrahim Dar, Yang Li, Algirdas Dučinskas, Brian Carlsen, Wolfgang Tress, Amita Ummadisingu, Shaik M. Zakeeruddin, Frank Schreiber, Anders Hagfeldt, Ursula Röthlisberger, Ferdinand C. Grozema, Jovana V. Milić, Michael Graetzel
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