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Title: Inter-phase charge and energy transfer in Ruddlesden–Popper 2D perovskites: critical role of the spacing cations

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/c8ta01518j· OSTI ID:1489254
ORCiD logo [1];  [2];  [2];  [3];  [3];  [4];  [5];  [6]; ORCiD logo [2];  [3]
  1. Lund Univ., Lund (Sweden); Qatar Univ., Doha (Qatar)
  2. Fudan Univ., Shanghai (China)
  3. Lund Univ., Lund (Sweden)
  4. Argonne National Lab. (ANL), Argonne, IL (United States)
  5. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
  6. ELI-ALPS, ELI-HU Non-Profit Ltd., Szeged (Hungary); Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

Here, photo-generated charge carrier dynamics in Ruddlesden–Popper 2D perovskites with linear (n-BA) and branched (iso-BA) butylamine as spacing cations have been studied by using transient absorption and time-resolved photoluminescence spectroscopies. Both n-BA and iso-BA perovskites consist of mixed-phase 2D quantum wells with various layer thicknesses, where the photo-generated charges undergo inter-phase charge transfer from thinner quantum wells to thicker ones. By shortening the spacer from n-BA to iso-BA, the transfer rates are significantly increased, which can also diminish the charge accumulation in thin quantum wells induced by the unbalanced electron and hole charge transfer rates. Under high excitation intensity, the shorter spacing cation is found to further facilitate the energy transfer, which can compete with fast high-order carrier recombination and consequently improve the charge transfer efficiency. Intriguingly, we observe the existence of extra bulk 3D phases embedded within iso-BA perovskites, which can efficiently collect the confined charges within 2D phases and then transport them with faster carrier mobility and slower recombination rates.

Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
Qatar National Research Fund (QNRF); Swedish Research Council (SRC); European Regional Development Fund (ERDF); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1489254
Alternate ID(s):
OSTI ID: 1434137
Journal Information:
Journal of Materials Chemistry. A, Vol. 6, Issue 15; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 83 works
Citation information provided by
Web of Science

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Cited By (9)

The Role of Bulk and Interface Recombination in High‐Efficiency Low‐Dimensional Perovskite Solar Cells journal June 2019
Benefiting from Spontaneously Generated 2D/3D Bulk‐Heterojunctions in Ruddlesden−Popper Perovskite by Incorporation of S‐Bearing Spacer Cation journal May 2019
The Dominant Energy Transport Pathway in Halide Perovskites: Photon Recycling or Carrier Diffusion? journal April 2019
Air-Stable and Self-Driven Perovskite Photodiodes with High On/Off Ratio and Swift Photoresponse journal September 2018
Nonconfinement Structure Revealed in Dion–Jacobson Type Quasi‐2D Perovskite Expedites Interlayer Charge Transport journal October 2019
Tailoring vertical phase distribution of quasi-two-dimensional perovskite films via surface modification of hole-transporting layer journal February 2019
Dimensional tailoring of hybrid perovskites for photovoltaics journal November 2018
Strong thickness-dependent quantum confinement in all-inorganic perovskite Cs 2 PbI 4 with a Ruddlesden–Popper structure journal January 2019
Fluorination of Organic Spacer Impacts on the Structural and Optical Response of 2D Perovskites journal January 2020

Figures / Tables (4)