12 Citations (Scopus)

Abstract

Perovskite solar cells have gained increasing interest, especially after reaching performances which are comparable with mature silicon PV technologies. However, the perovskite crystalline structure CH3NH3PbI3 is unstable in the presence of moisture, which leads to fast degradation under ambient conditions. The commercialisation of perovskite solar cells will only be achieved with the engineering of long term stable materials. We report a modified perovskite absorber layer obtained by adding methylammonium iodide (MAI) and tetrabutylammonium (TBA) iodide. The incorporation of TBA improves the film coverage, reducing the number of pinholes. X-ray diffraction analysis suggests that, in common with other mixed larger cation perovskites, two distinct phases coexist: a 3D perovskite material and a 2D layered material. The TBA containing perovskite films showed improved hydrophobicity, which contributed to significantly higher moisture stability. The cells maintained their original PCE after 45 days under ambient conditions without encapsulation. In comparison, the CH3NH3PbX3 3D perovskite device lost more than 60% of its original efficiency over the same time.
Original languageEnglish
Pages (from-to)22325-22333
Number of pages9
JournalJournal of Materials Chemistry A
Volume5
Issue number42
DOIs
Publication statusPublished - 17 Oct 2017

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Perovskite
Cations
Moisture
Positive ions
Silicon
Hydrophobicity
Encapsulation
X ray diffraction analysis
Perovskite solar cells
perovskite
tetrabutylammonium
Crystalline materials
Degradation

Cite this

@article{ccab2765bd954e13a7ed9bd50d2f2572,
title = "Tetrabutylammonium cations for moisture-resistant and semitransparent perovskite solar cells",
abstract = "Perovskite solar cells have gained increasing interest, especially after reaching performances which are comparable with mature silicon PV technologies. However, the perovskite crystalline structure CH3NH3PbI3 is unstable in the presence of moisture, which leads to fast degradation under ambient conditions. The commercialisation of perovskite solar cells will only be achieved with the engineering of long term stable materials. We report a modified perovskite absorber layer obtained by adding methylammonium iodide (MAI) and tetrabutylammonium (TBA) iodide. The incorporation of TBA improves the film coverage, reducing the number of pinholes. X-ray diffraction analysis suggests that, in common with other mixed larger cation perovskites, two distinct phases coexist: a 3D perovskite material and a 2D layered material. The TBA containing perovskite films showed improved hydrophobicity, which contributed to significantly higher moisture stability. The cells maintained their original PCE after 45 days under ambient conditions without encapsulation. In comparison, the CH3NH3PbX3 3D perovskite device lost more than 60{\%} of its original efficiency over the same time.",
author = "Isabella Poli and Salvador Eslava and Petra Cameron",
year = "2017",
month = "10",
day = "17",
doi = "10.1039/c7ta06735f",
language = "English",
volume = "5",
pages = "22325--22333",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
number = "42",

}

TY - JOUR

T1 - Tetrabutylammonium cations for moisture-resistant and semitransparent perovskite solar cells

AU - Poli, Isabella

AU - Eslava, Salvador

AU - Cameron, Petra

PY - 2017/10/17

Y1 - 2017/10/17

N2 - Perovskite solar cells have gained increasing interest, especially after reaching performances which are comparable with mature silicon PV technologies. However, the perovskite crystalline structure CH3NH3PbI3 is unstable in the presence of moisture, which leads to fast degradation under ambient conditions. The commercialisation of perovskite solar cells will only be achieved with the engineering of long term stable materials. We report a modified perovskite absorber layer obtained by adding methylammonium iodide (MAI) and tetrabutylammonium (TBA) iodide. The incorporation of TBA improves the film coverage, reducing the number of pinholes. X-ray diffraction analysis suggests that, in common with other mixed larger cation perovskites, two distinct phases coexist: a 3D perovskite material and a 2D layered material. The TBA containing perovskite films showed improved hydrophobicity, which contributed to significantly higher moisture stability. The cells maintained their original PCE after 45 days under ambient conditions without encapsulation. In comparison, the CH3NH3PbX3 3D perovskite device lost more than 60% of its original efficiency over the same time.

AB - Perovskite solar cells have gained increasing interest, especially after reaching performances which are comparable with mature silicon PV technologies. However, the perovskite crystalline structure CH3NH3PbI3 is unstable in the presence of moisture, which leads to fast degradation under ambient conditions. The commercialisation of perovskite solar cells will only be achieved with the engineering of long term stable materials. We report a modified perovskite absorber layer obtained by adding methylammonium iodide (MAI) and tetrabutylammonium (TBA) iodide. The incorporation of TBA improves the film coverage, reducing the number of pinholes. X-ray diffraction analysis suggests that, in common with other mixed larger cation perovskites, two distinct phases coexist: a 3D perovskite material and a 2D layered material. The TBA containing perovskite films showed improved hydrophobicity, which contributed to significantly higher moisture stability. The cells maintained their original PCE after 45 days under ambient conditions without encapsulation. In comparison, the CH3NH3PbX3 3D perovskite device lost more than 60% of its original efficiency over the same time.

UR - http://doi.org/10.1039/C7TA06735F

UR - http://doi.org/10.1039/C7TA06735F

U2 - 10.1039/c7ta06735f

DO - 10.1039/c7ta06735f

M3 - Article

VL - 5

SP - 22325

EP - 22333

JO - Journal of Materials Chemistry A

JF - Journal of Materials Chemistry A

SN - 2050-7488

IS - 42

ER -