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Title: Electronic structure evolution of fullerene on CH3NH3PbI3

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4916079· OSTI ID:1238030
 [1];  [1];  [2];  [1];  [3];  [3];  [3];  [3];  [1]
  1. Univ. of Rochester, Rochester, NY (United States)
  2. Central South Univ., Changsha (People's Republic of China)
  3. Univ. of Nebraska, Lincoln, NE (United States)

The thickness dependence of fullerene on CH3NH3PbI3 perovskitefilm surface has been investigated by using ultraviolet photoemission spectroscopy (UPS), X-ray photoemission spectroscopy(XPS), and inverse photoemission spectroscopy (IPES). The lowest unoccupied molecular orbital and highest occupied molecular orbital (HOMO) can be observed directly with IPES and UPS. It is observed that the HOMO level in fullerene shifts to lower binding energy. The XPS results show a strong initial shift of core levels to lower binding energy in the perovskite, which indicates that electrons transfer from the perovskitefilm to fullerene molecules. Further deposition of fullerene forms C60 solid, accompanied by the reduction of the electron transfer. As a result, the strongest electron transfer happened at 1/4 monolayer of fullerene.

Research Organization:
Univ. of Nebraska, Lincoln, NE (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
EE0006709
OSTI ID:
1238030
Alternate ID(s):
OSTI ID: 1226724
Journal Information:
Applied Physics Letters, Vol. 106, Issue 11; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 41 works
Citation information provided by
Web of Science

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Cited By (10)

Picosecond Capture of Photoexcited Electrons Improves Photovoltaic Conversion in MAPbI 3 :C 70 -Doped Planar and Mesoporous Solar Cells journal August 2018
Recent Advances in Energetics and Stability of Metal Halide Perovskites for Optoelectronic Applications journal December 2018
Progress of Surface Science Studies on ABX 3 ‐Based Metal Halide Perovskite Solar Cells journal April 2020
Rapid Fabrication of Ni/NiO@CoFe Layered Double Hydroxide Hierarchical Nanostructures by Femtosecond Laser Ablation and Electrodeposition for Efficient Overall Water Splitting journal May 2019
Defects in metal triiodide perovskite materials towards high-performance solar cells: origin, impact, characterization, and engineering journal January 2018
Investigation on thermal evaporated CH 3 NH 3 PbI 3 thin films journal September 2015
Research Update: The electronic structure of hybrid perovskite layers and their energetic alignment in devices journal August 2016
Perovskite-perovskite tandem photovoltaics with optimized band gaps journal October 2016
Controllable Synthesis of 2D Perovskite on Different Substrates and Its Application as Photodetector journal August 2018
Perovskite-perovskite tandem photovoltaics with optimized bandgaps text January 2016

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