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Cited by 253

The DOI matches its Crossref record; 57 of the 57 references it cites were found in a registry or an index.

Two-Dimensional Halide Perovskites Incorporating Straight Chain Symmetric Diammonium Ions, (NH3CmH2 mNH3)(CH3NH3)n−1PbnI3 n+1 (m = 4–9; n = 1–4)

Open access
Li, Xiaotong, Hoffman, Justin, Ke, Weijun, Chen, Michelle, Tsai, Hsinhan, Nie, Wanyi, Mohite, Aditya D., Kepenekian, Mikaël, Katan, Claudine, Even, Jacky, Wasielewski, Michael R., Stoumpos, Constantinos C., Kanatzidis, Mercouri G.·2018·Journal of the American Chemical Society
DOI 10.1021/jacs.8b07712
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Abstract

Low-dimensional halide perovskites have recently attracted intense interest as alternatives to the three-dimensional (3D) perovskites because of their greater tunability and higher environmental stability. Herein, we present the new homologous 2D series (NH 3 C m H 2 m NH 3 )(CH 3 NH 3 ) n −1 Pb n I 3 n +1 ( m = 4–9; n = 1–4), where m represents the carbon-chain number and n equals layer-thickness number. Multilayer ( n > 1) 2D perovskites incorporating diammonium cations were successfully synthesized by the solid-state grinding method for m = 4 and 6 and by the solution method for m = 7–9. Structural characterization by single-crystal X-ray diffraction for the m = 8 and m = 9 series ( n = 1–4) reveals that these compounds adopt the Cc space group for even n members and Pc for odd n members. The optical bandgaps are 2.15 eV for two-layer ( n = 2), 2.01 eV for three-layer ( n = 3), and 1.90 eV for four-layer ( n = 4). The materials exhibit excellent solution processability, and casting thin-films of the n = 3 members was successfully accomplished. The films show a clear tendency for the higher- m members to have preferred orientation on the glass substrate, with m = 8 exhibiting almost perfect vertical layer orientation and m = 9 displaying both vertical and parallel layer orientation, as confirmed by grazing-incidence wide-angle X-ray scattering (GIWAXS) measurements. The vertical layer orientation for the (NH 3 C 8 H 16 NH 3 )(CH 3 NH 3 ) 2 Pb 3 I 10 member results in the best thermal, light, and air stability within this series, thus showing excellent potential for solar cell applications.

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Metadata

Authors
Li, X., Hoffman, J., Ke, W., Chen, M., Tsai, H., Nie, W., Mohite, A. D., Kepenekian, M., Katan, C., Even, J., Wasielewski, M. R., Stoumpos, C. C., & Kanatzidis, M. G.
Venue
Journal of the American Chemical Society
Publisher
American Chemical Society (ACS)
Published
2018-08-31
Volume
140
Issue
38
Pages
12226-12238
ISSN
  • 0002-7863 (ISSN-L)
  • 1520-5126
DOI
10.1021/jacs.8b07712
OpenAlex
W2889430116
Cited by
253
References
57
FWCI
11.10
Type
journal article
Language
en
Open access
green

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