Premium
Preferred Growth Direction by PbS Nanoplatelets Preserves Perovskite Infrared Light Harvesting for Stable, Reproducible, and Efficient Solar Cells
Author(s) -
SánchezGodoy Humberto Emmanuel,
Erazo Eider Ansisar,
GualdrónReyes Andrés Fabián,
Khan Ali Hossain,
Agouram Said,
Barea Eva Maria,
Rodriguez Rubén Arturo,
Zarazúa Isaac,
Ortiz Pablo,
Cortés María Teresa,
MuñozSanjosé Vicente,
Moreels Iwan,
Masi Sofia,
MoraSeró Iván
Publication year - 2020
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.202002422
Subject(s) - formamidinium , materials science , perovskite (structure) , perovskite solar cell , phase (matter) , optoelectronics , crystal (programming language) , energy conversion efficiency , nanotechnology , chemical engineering , chemistry , organic chemistry , computer science , engineering , programming language
Formamidinium‐based perovskite solar cells (PSCs) present the maximum theoretical efficiency of the lead perovskite family. However, formamidinium perovskite exhibits significant degradation in air. The surface chemistry of PbS has been used to improve the formamidinium black phase stability. Here, the use of PbS nanoplatelets with (100) preferential crystal orientation is reported, to potentiate the repercussion on the crystal growth of perovskite grains and to improve the stability of the material and consequently of the solar cells. As a result, a vertical growth of perovskite grains, a stable current density of 23 mA cm −2 , and a stable incident photon to current efficiency in the infrared region of the spectrum for 4 months is obtained, one of the best stability achievements for planar PSCs. Moreover, a better reproducibility than the control device, by optimizing the PbS concentration in the perovskite matrix, is achieved. These outcomes validate the synergistic use of PbS nanoplatelets to improve formamidinium long‐term stability and performance reproducibility, and pave the way for using metastable perovskite active phases preserving their light harvesting capability.