Charge Transfer Dynamics between Carbon Nanotubes and Hybrid Organic Metal Halide Perovskite Films

Adewole Schulz, Anne-Marie Dowgiallo, Mengjin Yang, Kai Zhu, Jeffrey Blackburn, Joseph Berry, Joseph Berry

Research output: Contribution to journalArticlepeer-review

81 Scopus Citations

Abstract

In spite of the rapid rise of metal organic halide perovskites for next-generation solar cells, little quantitative information on the electronic structure of interfaces of these materials is available. The present study characterizes the electronic structure of interfaces between semiconducting single walled carbon nanotube (SWCNT) contacts and a prototypical methylammonium lead iodide (MAPbI3) absorber layer. Using photoemission spectroscopy we provide quantitative values for the energy levels at the interface and observe the formation of an interfacial dipole between SWCNTs and perovskite. This process can be ascribed to electron donation from the MAPbI3 to the adjacent SWCNT making the nanotube film n-type at the interface and inducing band bending throughout the SWCNT layer. We then use transient absorbance spectroscopy to correlate this electronic alignment with rapid and efficient photoexcited charge transfer. The results indicate that SWCNT transport and contact layers facilitate rapid charge extraction and suggest avenues for enhancing device performance.

Original languageAmerican English
Pages (from-to)418-425
Number of pages8
JournalJournal of Physical Chemistry Letters
Volume7
Issue number3
DOIs
StatePublished - 4 Feb 2016

Bibliographical note

Publisher Copyright:
© 2016 American Chemical Society.

NREL Publication Number

  • NREL/JA-5K00-64894

Keywords

  • carbon nanotubes
  • electronic structures/processes/mechanisms
  • hybrid materials
  • nanomaterials
  • photovoltaic devices
  • solar-photochemistry

Fingerprint

Dive into the research topics of 'Charge Transfer Dynamics between Carbon Nanotubes and Hybrid Organic Metal Halide Perovskite Films'. Together they form a unique fingerprint.

Cite this