Effective Hole Extraction using MoOx-Al Contact in Perovskite CH3NH3PbI3 Solar Cells

Yixin Zhao; Alexandre M. Nardes; Kai Zhu

doi:10.1063/1.4880899

Effective Hole Extraction using MoOx-Al Contact in Perovskite CH3NH3PbI3 Solar Cells

Yixin Zhao, Alexandre M. Nardes, Kai Zhu

Chemistry and Nanoscience

National Renewable Energy Laboratory

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

145 Scopus Citations

Abstract

We report an 11.4%-efficient perovskite CH₃NH ₃PbI₃ solar cell using low-cost molybdenum oxide/aluminum (i.e., MoO_x/Al) as an alternative top contact to replace noble/precious metals (e.g., Au or Ag) for extracting photogenerated holes. The device performance of perovskite solar cells using a MoO_x/Al top contact is comparable to that of cells using the standard Ag top contact. Analysis of impedance spectroscopy measurements suggests that using 10-nm-thick MoO_x and Al does not affect charge-recombination properties of perovskite solar cells. Using a thicker (20-nm) MoO_x layer leads to a lower cell performance caused mainly by a reduced fill factor. Our results suggest that MoO_x/Al is promising as a low-cost and effective hole-extraction contact for perovskite solar cells.

Original language	American English
Article number	Article No. 213906
Number of pages	4
Journal	Applied Physics Letters
Volume	104
Issue number	21
DOIs	https://doi.org/10.1063/1.4880899 https://doi.org/10.1063/1.4880899
State	Published - 26 May 2014

NREL Publication Number

NREL/JA-5900-61735

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title = "Effective Hole Extraction using MoOx-Al Contact in Perovskite CH3NH3PbI3 Solar Cells",

abstract = "We report an 11.4%-efficient perovskite CH3NH 3PbI3 solar cell using low-cost molybdenum oxide/aluminum (i.e., MoOx/Al) as an alternative top contact to replace noble/precious metals (e.g., Au or Ag) for extracting photogenerated holes. The device performance of perovskite solar cells using a MoOx/Al top contact is comparable to that of cells using the standard Ag top contact. Analysis of impedance spectroscopy measurements suggests that using 10-nm-thick MoOx and Al does not affect charge-recombination properties of perovskite solar cells. Using a thicker (20-nm) MoOx layer leads to a lower cell performance caused mainly by a reduced fill factor. Our results suggest that MoOx/Al is promising as a low-cost and effective hole-extraction contact for perovskite solar cells.",

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AU - Zhao, Yixin

AU - Nardes, Alexandre M.

AU - Zhu, Kai

PY - 2014/5/26

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N2 - We report an 11.4%-efficient perovskite CH3NH 3PbI3 solar cell using low-cost molybdenum oxide/aluminum (i.e., MoOx/Al) as an alternative top contact to replace noble/precious metals (e.g., Au or Ag) for extracting photogenerated holes. The device performance of perovskite solar cells using a MoOx/Al top contact is comparable to that of cells using the standard Ag top contact. Analysis of impedance spectroscopy measurements suggests that using 10-nm-thick MoOx and Al does not affect charge-recombination properties of perovskite solar cells. Using a thicker (20-nm) MoOx layer leads to a lower cell performance caused mainly by a reduced fill factor. Our results suggest that MoOx/Al is promising as a low-cost and effective hole-extraction contact for perovskite solar cells.

AB - We report an 11.4%-efficient perovskite CH3NH 3PbI3 solar cell using low-cost molybdenum oxide/aluminum (i.e., MoOx/Al) as an alternative top contact to replace noble/precious metals (e.g., Au or Ag) for extracting photogenerated holes. The device performance of perovskite solar cells using a MoOx/Al top contact is comparable to that of cells using the standard Ag top contact. Analysis of impedance spectroscopy measurements suggests that using 10-nm-thick MoOx and Al does not affect charge-recombination properties of perovskite solar cells. Using a thicker (20-nm) MoOx layer leads to a lower cell performance caused mainly by a reduced fill factor. Our results suggest that MoOx/Al is promising as a low-cost and effective hole-extraction contact for perovskite solar cells.

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Effective Hole Extraction using MoOx-Al Contact in Perovskite CH3NH3PbI3 Solar Cells

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