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Interface Reconstruction from Ruddlesden–Popper Structures Impacts Stability in Lead Halide Perovskite Solar Cells

Journal Article · · Advanced Materials
 [1];  [2];  [2];  [2];  [2];  [2];  [2];  [3];  [4];  [2];  [2]
  1. Georgia Institute of Technology, Atlanta, GA (United States); University of Washington
  2. Georgia Institute of Technology, Atlanta, GA (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
  4. Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source II (NSLS-II)
+ Show Author Affiliations
The impact of the bulky-cation-modified interfaces on halide perovskite solar cell stability is underexplored. Here, in this work, the thermal instability of the bulky-cation interface layers used in the state-of-the-art solar cells is demonstrated. X-ray photoelectron spectroscopy and synchrotron-based grazing-incidence X-ray scattering measurements reveal significant changes in the chemical composition and structure at the surface of these films that occur under thermal stress. The changes impact charge-carrier dynamics and device operation, as shown in transient photoluminescence, excitation correlation spectroscopy, and solar cells. The type of cation used for surface treatment affects the extent of these changes, where long carbon chains provide more stable interfaces. These results highlight that prolonged annealing of the treated interfaces is critical to enable reliable reporting of performances and to drive the selection of different bulky cations.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Georgia Institute of Technology, Atlanta, GA (United States); Univ. of Colorado, Boulder, CO (United States); Univ. of Washington, Seattle, WA (United States)
Sponsoring Organization:
USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Grant/Contract Number:
AC02-06CH11357; EE0008747; EE0009369; SC0012704
OSTI ID:
1969155
Alternate ID(s):
OSTI ID: 2349071
OSTI ID: 1906534
OSTI ID: 1973503
Report Number(s):
BNL-224377-2023-JAAM
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 51 Vol. 34; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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36 MATERIALS SCIENCE
Ruddlesden–Popper
interface passivation
interface reconstruction
interface structure
perovskite solar cells
stability
surface chemistry
surface structures