Advanced

Nonconfinement Structure Revealed in Dion–Jacobson Type Quasi-2D Perovskite Expedites Interlayer Charge Transport

Yu, Shuang ; Yan, Yajie ; Abdellah, Mohamed LU ; Pullerits, Tõnu LU ; Zheng, Kaibo LU and Liang, Ziqi (2019) In Small 15(49).
Abstract

Dion–Jacobson (DJ) type 2D perovskites with a single organic cation layer exhibit a narrower distance between two adjacent inorganic layers compared to the corresponding Ruddlesden–Popper perovskites, which facilitates interlayer charge transport. However, the internal crystal structures in 2D DJ perovskites remain elusive. Herein, in a p-xylylenediamine (PDMA)-based DJ perovskite bearing bifunctional NH3 + spacer, the compression from confinement structure (inorganic layer number, n = 1, 2) to nonconfinement structure (n > 3) with the decrease of PDMA molar ratio is unraveled. Remarkably, the nonconfined perovskite displays shorter spacing between 2D quantum wells, which results in a lower exciton binding... (More)

Dion–Jacobson (DJ) type 2D perovskites with a single organic cation layer exhibit a narrower distance between two adjacent inorganic layers compared to the corresponding Ruddlesden–Popper perovskites, which facilitates interlayer charge transport. However, the internal crystal structures in 2D DJ perovskites remain elusive. Herein, in a p-xylylenediamine (PDMA)-based DJ perovskite bearing bifunctional NH3 + spacer, the compression from confinement structure (inorganic layer number, n = 1, 2) to nonconfinement structure (n > 3) with the decrease of PDMA molar ratio is unraveled. Remarkably, the nonconfined perovskite displays shorter spacing between 2D quantum wells, which results in a lower exciton binding energy and hence promotes exciton dissociation. The significantly diminishing quantum confinement promotes interlayer charge transport leading to a maximum photovoltaic efficiency of ≈11%. Additionally, the tighter interlayer packing arising from the squeezing of inorganic octahedra gives rise to enhanced ambient stability.

(Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Dion–Jacobson, excitons, nonconfinement structures, planar perovskite solar cells, quasi-2D perovskite
in
Small
volume
15
issue
49
article number
1905081
publisher
John Wiley and Sons Inc.
external identifiers
  • scopus:85074650940
  • pmid:31639286
ISSN
1613-6810
DOI
10.1002/smll.201905081
language
English
LU publication?
yes
id
8386646b-ad46-4171-bc27-aeb60483ab2d
date added to LUP
2019-11-25 12:16:21
date last changed
2020-05-26 05:35:46
@article{8386646b-ad46-4171-bc27-aeb60483ab2d,
  abstract     = {<p>Dion–Jacobson (DJ) type 2D perovskites with a single organic cation layer exhibit a narrower distance between two adjacent inorganic layers compared to the corresponding Ruddlesden–Popper perovskites, which facilitates interlayer charge transport. However, the internal crystal structures in 2D DJ perovskites remain elusive. Herein, in a p-xylylenediamine (PDMA)-based DJ perovskite bearing bifunctional NH<sub>3</sub> <sup>+</sup> spacer, the compression from confinement structure (inorganic layer number, n = 1, 2) to nonconfinement structure (n &gt; 3) with the decrease of PDMA molar ratio is unraveled. Remarkably, the nonconfined perovskite displays shorter spacing between 2D quantum wells, which results in a lower exciton binding energy and hence promotes exciton dissociation. The significantly diminishing quantum confinement promotes interlayer charge transport leading to a maximum photovoltaic efficiency of ≈11%. Additionally, the tighter interlayer packing arising from the squeezing of inorganic octahedra gives rise to enhanced ambient stability.</p>},
  author       = {Yu, Shuang and Yan, Yajie and Abdellah, Mohamed and Pullerits, Tõnu and Zheng, Kaibo and Liang, Ziqi},
  issn         = {1613-6810},
  language     = {eng},
  month        = {10},
  number       = {49},
  publisher    = {John Wiley and Sons Inc.},
  series       = {Small},
  title        = {Nonconfinement Structure Revealed in Dion–Jacobson Type Quasi-2D Perovskite Expedites Interlayer Charge Transport},
  url          = {http://dx.doi.org/10.1002/smll.201905081},
  doi          = {10.1002/smll.201905081},
  volume       = {15},
  year         = {2019},
}