Chloride inclusion and hole transport material doping to improve methyl ammonium lead bromide perovskite-based high open-circuit voltage solar cells

Eran Edri; Saar Kirmayer; Michael Kulbak; Gary Hodes; David Cahen

doi:10.1021/jz402706q

Chloride inclusion and hole transport material doping to improve methyl ammonium lead bromide perovskite-based high open-circuit voltage solar cells

Eran Edri, Saar Kirmayer, Michael Kulbak, Gary Hodes, David Cahen

Research output: Contribution to journal › Article › peer-review

365 Scopus citations

Abstract

Low-cost solar cells with high V_OC, relatively small (E _G - qV_OC), and high qV_OC/E_G ratio, where E_G is the absorber band gap, are long sought after, especially for use in tandem cells or other systems with spectral splitting. We report a significant improvement in CH₃NH₃PbBr₃-based cells, using CH₃NH₃PbBr_3-xCl_x, with E_G = 2.3 eV, as the absorber in a mesoporous p-i-n device configuration. By p-doping an organic hole transport material with a deep HOMO level and wide band gap to reduce recombination, the cell's V_OC increased to 1.5 V, a 0.2 V increase from our earlier results with the pristine Br analogue with an identical band gap. At the same time, in the most efficient devices, the current density increased from ∼1 to ∼4 mA/cm².

Original language	English
Pages (from-to)	429-433
Number of pages	5
Journal	Journal of Physical Chemistry Letters
Volume	5
Issue number	3
DOIs	https://doi.org/10.1021/jz402706q
State	Published - 6 Feb 2014
Externally published	Yes

Keywords

high open-circuit voltage
organic-inorganic lead halide perovskite
solar cell

ASJC Scopus subject areas

General Materials Science
Physical and Theoretical Chemistry

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1021/jz402706q

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title = "Chloride inclusion and hole transport material doping to improve methyl ammonium lead bromide perovskite-based high open-circuit voltage solar cells",

abstract = "Low-cost solar cells with high VOC, relatively small (E G - qVOC), and high qVOC/EG ratio, where EG is the absorber band gap, are long sought after, especially for use in tandem cells or other systems with spectral splitting. We report a significant improvement in CH3NH3PbBr3-based cells, using CH3NH3PbBr3-xClx, with EG = 2.3 eV, as the absorber in a mesoporous p-i-n device configuration. By p-doping an organic hole transport material with a deep HOMO level and wide band gap to reduce recombination, the cell's VOC increased to 1.5 V, a 0.2 V increase from our earlier results with the pristine Br analogue with an identical band gap. At the same time, in the most efficient devices, the current density increased from ∼1 to ∼4 mA/cm2.",

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author = "Eran Edri and Saar Kirmayer and Michael Kulbak and Gary Hodes and David Cahen",

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T1 - Chloride inclusion and hole transport material doping to improve methyl ammonium lead bromide perovskite-based high open-circuit voltage solar cells

AU - Edri, Eran

AU - Kirmayer, Saar

AU - Kulbak, Michael

AU - Hodes, Gary

AU - Cahen, David

PY - 2014/2/6

Y1 - 2014/2/6

N2 - Low-cost solar cells with high VOC, relatively small (E G - qVOC), and high qVOC/EG ratio, where EG is the absorber band gap, are long sought after, especially for use in tandem cells or other systems with spectral splitting. We report a significant improvement in CH3NH3PbBr3-based cells, using CH3NH3PbBr3-xClx, with EG = 2.3 eV, as the absorber in a mesoporous p-i-n device configuration. By p-doping an organic hole transport material with a deep HOMO level and wide band gap to reduce recombination, the cell's VOC increased to 1.5 V, a 0.2 V increase from our earlier results with the pristine Br analogue with an identical band gap. At the same time, in the most efficient devices, the current density increased from ∼1 to ∼4 mA/cm2.

AB - Low-cost solar cells with high VOC, relatively small (E G - qVOC), and high qVOC/EG ratio, where EG is the absorber band gap, are long sought after, especially for use in tandem cells or other systems with spectral splitting. We report a significant improvement in CH3NH3PbBr3-based cells, using CH3NH3PbBr3-xClx, with EG = 2.3 eV, as the absorber in a mesoporous p-i-n device configuration. By p-doping an organic hole transport material with a deep HOMO level and wide band gap to reduce recombination, the cell's VOC increased to 1.5 V, a 0.2 V increase from our earlier results with the pristine Br analogue with an identical band gap. At the same time, in the most efficient devices, the current density increased from ∼1 to ∼4 mA/cm2.

KW - high open-circuit voltage

KW - organic-inorganic lead halide perovskite

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Chloride inclusion and hole transport material doping to improve methyl ammonium lead bromide perovskite-based high open-circuit voltage solar cells

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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