TY - JOUR
T1 - Guanine-Stabilized Formamidinium Lead Iodide Perovskites
AU - Hong, Li
AU - Milić, Jovana V.
AU - Ahlawat, Paramvir
AU - Mladenović, Marko
AU - Kubicki, Dominik J.
AU - Jahanabkhshi, Farzaneh
AU - Ren, Dan
AU - Gélvez-Rueda, María C.
AU - Grozema, Ferdinand C.
AU - More Authors, null
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
KW - guanine
KW - hybrid perovskites
KW - low-dimensional perovskites
KW - perovskite solar cells
KW - solid-state NMR
UR - http://www.scopus.com/inward/record.url?scp=85078984271&partnerID=8YFLogxK
U2 - 10.1002/anie.201912051
DO - 10.1002/anie.201912051
M3 - Article
AN - SCOPUS:85078984271
SN - 1433-7851
VL - 59
SP - 4691
EP - 4697
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 12
ER -
