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

Yajie Yan, Shuang Yu, Alireza Honarfar, Tõnu Pullerits, Kaibo Zheng*, Ziqi Liang

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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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 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 NH4Cl 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.
Original languageEnglish
Article number1900548
JournalAdvanced Science
Volume6
Issue number14
Number of pages9
ISSN2198-3844
DOIs
Publication statusPublished - 2019

Keywords

  • 2D Ruddlesdden–Popper perovskites
  • 3D phase
  • Air stability
  • Low-temperature fabrication
  • Planar solar cells

Cite this

@article{918f332158ae4962b5bf31a78b35965b,
title = "Benefiting from Spontaneously Generated 2D/3D Bulk-Heterojunctions in Ruddlesden−Popper Perovskite by Incorporation of S-Bearing Spacer Cation",
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 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 NH4Cl 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.",
keywords = "2D Ruddlesdden–Popper perovskites, 3D phase, Air stability, Low-temperature fabrication, Planar solar cells",
author = "Yajie Yan and Shuang Yu and Alireza Honarfar and T{\~o}nu Pullerits and Kaibo Zheng and Ziqi Liang",
year = "2019",
doi = "10.1002/advs.201900548",
language = "English",
volume = "6",
journal = "Advanced Science",
issn = "2198-3844",
publisher = "Wiley",
number = "14",

}

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; Zheng, Kaibo; Liang, Ziqi.

In: Advanced Science, Vol. 6, No. 14, 1900548, 2019.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Benefiting from Spontaneously Generated 2D/3D Bulk-Heterojunctions in Ruddlesden−Popper Perovskite by Incorporation of S-Bearing Spacer Cation

AU - Yan, Yajie

AU - Yu, Shuang

AU - Honarfar, Alireza

AU - Pullerits, Tõnu

AU - Zheng, Kaibo

AU - Liang, Ziqi

PY - 2019

Y1 - 2019

N2 - 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 NH4Cl 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.

AB - 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 NH4Cl 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.

KW - 2D Ruddlesdden–Popper perovskites

KW - 3D phase

KW - Air stability

KW - Low-temperature fabrication

KW - Planar solar cells

U2 - 10.1002/advs.201900548

DO - 10.1002/advs.201900548

M3 - Journal article

VL - 6

JO - Advanced Science

JF - Advanced Science

SN - 2198-3844

IS - 14

M1 - 1900548

ER -