Premium
Suppression of Electron Trapping in MAPbI 3 Perovskite by Sr 2+ Doping
Author(s) -
Jasiūnas Rokas,
Gegevičius Rokas,
Franckevičius Marius,
Phung Nga,
Abate Antonio,
Gulbinas Vidmantas
Publication year - 2020
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.202000307
Subject(s) - perovskite (structure) , photoluminescence , photocurrent , doping , materials science , trapping , energy conversion efficiency , carrier lifetime , optoelectronics , photovoltaics , quenching (fluorescence) , perovskite solar cell , chemistry , photovoltaic system , optics , crystallography , silicon , fluorescence , physics , electrical engineering , biology , engineering , ecology
Perovskite‐based solar cells currently are one of the most rapidly developing fields in solar photovoltaics. Chemical doping of perovskites with foreign atoms is a promising way to tailor material properties toward improving the performance and stability of solar cells. Herein, efficiency enhancement of planar MAPbI 3 perovskite solar cells by doping them with 0.1–5% Sr 2+ is discussed. A small amount (<1%) of Sr 2+ added to the perovskite improves the V oc by ≈80 mV and consequently increases the power conversion efficiency (PCE) from 16.8% to 17.8%. Using transient photoluminescence, transient photocurrent, and time‐delayed collection field measurements, it is demonstrated that Sr 2+ additives reduce the trap density and increase the perovskite photoluminescence lifetime. However, reaching ≈1% concentration, Sr 2+ additives create additional carrier traps, which cause fast photoluminescence quenching and slow carrier recombination.