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Enabling room-temperature processed highly efficient and stable 2D Ruddlesden-Popper perovskite solar cells with eliminated hysteresis by synergistic exploitation of additives and solvents

Yu, Shuang; Yan, Yajie; Chen, Yani; Chábera, Pavel LU ; Zheng, Kaibo LU and Liang, Ziqi (2019) In Journal of Materials Chemistry A 7(5). p.2015-2021
Abstract

Herein we demonstrate the favorable synergistic effect of an NH4Cl additive and DMSO solvent on 2D perovskites that are synthesized at room temperature. Interestingly, we observe the spontaneous formation of 3D phases within either NH4Cl or DMSO treated 2D perovskites, which plays a pivotal role in facilitating charge transport. It is revealed that NH4Cl increases charge carrier lifetime and passivate trap states within the 3D phase while DMSO promotes 2D/3D inter-phase charge transfer. These two competitive processes reach a delicate balance in DMSO and NH4Cl co-treated devices, which deliver a maximum PCE up to 13.41% with excellent air-stability and eliminated hysteresis. This is among the... (More)

Herein we demonstrate the favorable synergistic effect of an NH4Cl additive and DMSO solvent on 2D perovskites that are synthesized at room temperature. Interestingly, we observe the spontaneous formation of 3D phases within either NH4Cl or DMSO treated 2D perovskites, which plays a pivotal role in facilitating charge transport. It is revealed that NH4Cl increases charge carrier lifetime and passivate trap states within the 3D phase while DMSO promotes 2D/3D inter-phase charge transfer. These two competitive processes reach a delicate balance in DMSO and NH4Cl co-treated devices, which deliver a maximum PCE up to 13.41% with excellent air-stability and eliminated hysteresis. This is among the highest values reported for 2D RP perovskite (n = 4) based planar solar cells, particularly via all low-temperature solution fabrication.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Materials Chemistry A
volume
7
issue
5
pages
7 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85060825343
ISSN
2050-7488
DOI
10.1039/c8ta09146c
language
English
LU publication?
yes
id
14240354-1ebc-45b9-9eb7-b8f51a42e5cc
date added to LUP
2019-02-12 14:17:30
date last changed
2019-03-17 05:12:53
@article{14240354-1ebc-45b9-9eb7-b8f51a42e5cc,
  abstract     = {<p>Herein we demonstrate the favorable synergistic effect of an NH<sub>4</sub>Cl additive and DMSO solvent on 2D perovskites that are synthesized at room temperature. Interestingly, we observe the spontaneous formation of 3D phases within either NH<sub>4</sub>Cl or DMSO treated 2D perovskites, which plays a pivotal role in facilitating charge transport. It is revealed that NH<sub>4</sub>Cl increases charge carrier lifetime and passivate trap states within the 3D phase while DMSO promotes 2D/3D inter-phase charge transfer. These two competitive processes reach a delicate balance in DMSO and NH<sub>4</sub>Cl co-treated devices, which deliver a maximum PCE up to 13.41% with excellent air-stability and eliminated hysteresis. This is among the highest values reported for 2D RP perovskite (n = 4) based planar solar cells, particularly via all low-temperature solution fabrication.</p>},
  author       = {Yu, Shuang and Yan, Yajie and Chen, Yani and Chábera, Pavel and Zheng, Kaibo and Liang, Ziqi},
  issn         = {2050-7488},
  language     = {eng},
  number       = {5},
  pages        = {2015--2021},
  publisher    = {Royal Society of Chemistry},
  series       = {Journal of Materials Chemistry A},
  title        = {Enabling room-temperature processed highly efficient and stable 2D Ruddlesden-Popper perovskite solar cells with eliminated hysteresis by synergistic exploitation of additives and solvents},
  url          = {http://dx.doi.org/10.1039/c8ta09146c},
  volume       = {7},
  year         = {2019},
}