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Benefiting from Spontaneously Generated 2D/3D Bulk-Heterojunctions in Ruddlesden−Popper Perovskite by Incorporation of S-Bearing Spacer Cation

Yan, Yajie ; Yu, Shuang ; Honarfar, Alireza ; Pullerits, Tõnu LU ; Zheng, Kaibo LU and Liang, Ziqi (2019) In Advanced Science 6(14).
Abstract


2D Ruddlesden–Popper (RP) perovskite solar cells have manifested superior operation durability yet inferior charge transport compared to their 3D counterparts. Integrating 3D phases with 2D RP perovskites presents a compromise to maintain respective advantages of both components. Here, the spontaneous generation of 3D phases embedded in 2D perovskite matrix is demonstrated at room temperature via introducing S-bearing thiophene−2−ethylamine (TEA) as both spacer and stabilizer of inorganic lattices. The resulting 2D/3D bulk heterojunction structures are believed to arise from the compression-induced epitaxial growth of the 3D phase at the grain boundaries of the 2D phase... (More)


2D Ruddlesden–Popper (RP) perovskite solar cells have manifested superior operation durability yet inferior charge transport compared to their 3D counterparts. Integrating 3D phases with 2D RP perovskites presents a compromise to maintain respective advantages of both components. Here, the spontaneous generation of 3D phases embedded in 2D perovskite matrix is demonstrated at room temperature via introducing S-bearing thiophene−2−ethylamine (TEA) as both spacer and stabilizer of inorganic lattices. The resulting 2D/3D bulk heterojunction structures are believed to arise from the compression-induced epitaxial growth of the 3D phase at the grain boundaries of the 2D phase through the Pb−S interaction. The as-prepared 2D TEA perovskites exhibit longer exciton diffusion length and extended charge carrier lifetime than the paradigm 2D phenylethylamine (PEA)-based analogues and hence demonstrate an outstanding power conversion efficiency of 7.20% with significantly increased photocurrent. Dual treatments by NH
4
Cl and dimethyl sulfoxide are further applied to ameliorate the crystallinity and crystal orientation of 2D perovskites. Consequently, TEA-based devices exhibit a stabilized efficiency over 11% with negligible hysteresis and display excellent ambient stability without encapsulation by preserving 80% efficiency after 270 h storage in air with 60 ± 5% relative humidity at 25 °C.

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; ; ; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
2D Ruddlesdden–Popper perovskites, 3D phase, air stability, low-temperature fabrication, planar solar cells
in
Advanced Science
volume
6
issue
14
article number
1900548
publisher
John Wiley & Sons Inc.
external identifiers
  • pmid:31380215
  • scopus:85066017867
ISSN
2198-3844
DOI
10.1002/advs.201900548
language
English
LU publication?
yes
id
1edd8ef1-47ad-41f7-ae06-56814a0ad063
date added to LUP
2019-06-14 14:11:50
date last changed
2024-05-28 15:18:53
@article{1edd8ef1-47ad-41f7-ae06-56814a0ad063,
  abstract     = {{<p><br>
                                                         2D Ruddlesden–Popper (RP) perovskite solar cells have manifested superior operation durability yet inferior charge transport compared to their 3D counterparts. Integrating 3D phases with 2D RP perovskites presents a compromise to maintain respective advantages of both components. Here, the spontaneous generation of 3D phases embedded in 2D perovskite matrix is demonstrated at room temperature via introducing S-bearing thiophene−2−ethylamine (TEA) as both spacer and stabilizer of inorganic lattices. The resulting 2D/3D bulk heterojunction structures are believed to arise from the compression-induced epitaxial growth of the 3D phase at the grain boundaries of the 2D phase through the Pb−S interaction. The as-prepared 2D TEA perovskites exhibit longer exciton diffusion length and extended charge carrier lifetime than the paradigm 2D phenylethylamine (PEA)-based analogues and hence demonstrate an outstanding power conversion efficiency of 7.20% with significantly increased photocurrent. Dual treatments by NH                             <br>
                            <sub>4</sub><br>
                                                         Cl and dimethyl sulfoxide are further applied to ameliorate the crystallinity and crystal orientation of 2D perovskites. Consequently, TEA-based devices exhibit a stabilized efficiency over 11% with negligible hysteresis and display excellent ambient stability without encapsulation by preserving 80% efficiency after 270 h storage in air with 60 ± 5% relative humidity at 25 °C.                         <br>
                        </p>}},
  author       = {{Yan, Yajie and Yu, Shuang and Honarfar, Alireza and Pullerits, Tõnu and Zheng, Kaibo and Liang, Ziqi}},
  issn         = {{2198-3844}},
  keywords     = {{2D Ruddlesdden–Popper perovskites; 3D phase; air stability; low-temperature fabrication; planar solar cells}},
  language     = {{eng}},
  month        = {{07}},
  number       = {{14}},
  publisher    = {{John Wiley & Sons Inc.}},
  series       = {{Advanced Science}},
  title        = {{Benefiting from Spontaneously Generated 2D/3D Bulk-Heterojunctions in Ruddlesden−Popper Perovskite by Incorporation of S-Bearing Spacer Cation}},
  url          = {{http://dx.doi.org/10.1002/advs.201900548}},
  doi          = {{10.1002/advs.201900548}},
  volume       = {{6}},
  year         = {{2019}},
}