Mixed Cation FAxPEA1– xPbI3 with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells

Nan Li; Zonglong Zhu; Chu-Chen Chueh; Hongbin Liu; Bo Peng; Alessio Petrone; Xiaosong Li; Liduo Wang; Alex K.-Y. Jen

doi:10.1002/aenm.201601307

Mixed Cation FA_xPEA_1– _xPbI₃ with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells

Nan Li
, Zonglong Zhu
, Chu-Chen Chueh
, Hongbin Liu
, Bo Peng
, Alessio Petrone
, Xiaosong Li
, Liduo Wang^*
, Alex K.-Y. Jen^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

367 Citations (Scopus)

Abstract

In this work, different from the commonly explored strategy of incorporating a smaller cation, MA⁺ and Cs⁺ into FAPbI₃ lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI₃ perovksite to form mixed cation FA_xPEA_1–xPbI₃ can effectively enhance both phase and ambient stability of FAPbI₃ as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA⁺ ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI₃ domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7%) and ambient stable FAPbI₃ solar cell could be developed.

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Original language	English
Article number	1601307
Journal	Advanced Energy Materials
Volume	7
Issue number	1
Online published	26 Sept 2016
DOIs	https://doi.org/10.1002/aenm.201601307
Publication status	Published - 11 Jan 2017
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

ambient stability
formamidinium lead iodide
perovskite solar cells
phase stability

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10.1002/aenm.201601307

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Cite this

@article{a4d065dc41e942f898eea4b6cf6afc17,

title = "Mixed Cation FAxPEA1– xPbI3 with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells",

abstract = "In this work, different from the commonly explored strategy of incorporating a smaller cation, MA+ and Cs+ into FAPbI3 lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI3 perovksite to form mixed cation FAxPEA1–xPbI3 can effectively enhance both phase and ambient stability of FAPbI3 as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA+ ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI3 domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7\%) and ambient stable FAPbI3 solar cell could be developed. {\textcopyright} 2016 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim ",

keywords = "ambient stability, formamidinium lead iodide, perovskite solar cells, phase stability",

author = "Nan Li and Zonglong Zhu and Chu-Chen Chueh and Hongbin Liu and Bo Peng and Alessio Petrone and Xiaosong Li and Liduo Wang and Jen, \{Alex K.-Y.\}",

year = "2017",

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doi = "10.1002/aenm.201601307",

language = "English",

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T1 - Mixed Cation FAxPEA1– xPbI3 with Enhanced Phase and Ambient Stability toward High-Performance Perovskite Solar Cells

AU - Li, Nan

AU - Zhu, Zonglong

AU - Chueh, Chu-Chen

AU - Liu, Hongbin

AU - Peng, Bo

AU - Petrone, Alessio

AU - Li, Xiaosong

AU - Wang, Liduo

AU - Jen, Alex K.-Y.

PY - 2017/1/11

Y1 - 2017/1/11

N2 - In this work, different from the commonly explored strategy of incorporating a smaller cation, MA+ and Cs+ into FAPbI3 lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI3 perovksite to form mixed cation FAxPEA1–xPbI3 can effectively enhance both phase and ambient stability of FAPbI3 as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA+ ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI3 domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7%) and ambient stable FAPbI3 solar cell could be developed. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

AB - In this work, different from the commonly explored strategy of incorporating a smaller cation, MA+ and Cs+ into FAPbI3 lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI3 perovksite to form mixed cation FAxPEA1–xPbI3 can effectively enhance both phase and ambient stability of FAPbI3 as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA+ ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI3 domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7%) and ambient stable FAPbI3 solar cell could be developed. © 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

KW - ambient stability

KW - formamidinium lead iodide

KW - perovskite solar cells

KW - phase stability

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U2 - 10.1002/aenm.201601307

DO - 10.1002/aenm.201601307

M3 - RGC 21 - Publication in refereed journal

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JO - Advanced Energy Materials

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