Nonconfinement Structure Revealed in Dion–Jacobson Type Quasi-2D Perovskite Expedites Interlayer Charge Transport
(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)
- author
- Yu, Shuang ; Yan, Yajie ; Abdellah, Mohamed LU ; Pullerits, Tõnu LU ; Zheng, Kaibo LU and Liang, Ziqi
- organization
- publishing date
- 2019-10-22
- 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 & 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
- 2024-09-19 13:33:27
@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 > 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}}, keywords = {{Dion–Jacobson; excitons; nonconfinement structures; planar perovskite solar cells; quasi-2D perovskite}}, language = {{eng}}, month = {{10}}, number = {{49}}, publisher = {{John Wiley & 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}}, }