Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

Fengzhu Li; Haochen Fan; Jie Zhang; Jin-Hua Huang; Pengcheng Wang; Caiyan Gao; Lian-Ming Yang; Zonglong Zhu; Alex K.-Y. Jen; Yanlin Song; Ke-Jian Jiang

doi:10.1002/solr.201900285

Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

Fengzhu Li, Haochen Fan, Jie Zhang, Jin-Hua Huang, Pengcheng Wang, Caiyan Gao, Lian-Ming Yang, Zonglong Zhu, Alex K.-Y. Jen^*, Yanlin Song^*, Ke-Jian Jiang^*

^*Corresponding author for this work

Department of Materials Science and Engineering

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

43 Citations (Scopus)

Abstract

The deposition of a uniform and dense tin-based perovskite layer with low defect-caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn²⁺ to Sn⁴⁺ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N₂H₄)₃(HI)₂) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI₃) perovskite layer. The resultant FASnI₃ layer is homogeneous with full surface coverage; moreover, the content of Sn⁴⁺ is significantly reduced in the film from the SnI₂ precursor owing to the reductive property of (N₂H₄)₃(HI)₂. With the high-quality FASnI₃ layer as a light absorber, planar-heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead-free tin-based perovskite solar cells.

Original language	English
Article number	1900285
Journal	Solar RRL
Volume	3
Issue number	8
Online published	19 Jul 2019
DOIs	https://doi.org/10.1002/solr.201900285
Publication status	Published - Sept 2019

UN SDGs

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

SDG 7 Affordable and Clean Energy

Research Keywords

lead-free
morphology
perovskite solar cell
trihydrazine dihydriodide
HALIDE PEROVSKITES
PERFORMANCE
STABILITY
FILMS

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title = "Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells",

abstract = "The deposition of a uniform and dense tin-based perovskite layer with low defect-caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn2+ to Sn4+ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N2H4)3(HI)2) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI3) perovskite layer. The resultant FASnI3 layer is homogeneous with full surface coverage; moreover, the content of Sn4+ is significantly reduced in the film from the SnI2 precursor owing to the reductive property of (N2H4)3(HI)2. With the high-quality FASnI3 layer as a light absorber, planar-heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead-free tin-based perovskite solar cells.",

keywords = "lead-free, morphology, perovskite solar cell, trihydrazine dihydriodide, HALIDE PEROVSKITES, PERFORMANCE, STABILITY, FILMS",

author = "Fengzhu Li and Haochen Fan and Jie Zhang and Jin-Hua Huang and Pengcheng Wang and Caiyan Gao and Lian-Ming Yang and Zonglong Zhu and Jen, {Alex K.-Y.} and Yanlin Song and Ke-Jian Jiang",

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language = "English",

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T1 - Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

AU - Li, Fengzhu

AU - Fan, Haochen

AU - Zhang, Jie

AU - Huang, Jin-Hua

AU - Wang, Pengcheng

AU - Gao, Caiyan

AU - Yang, Lian-Ming

AU - Zhu, Zonglong

AU - Jen, Alex K.-Y.

AU - Song, Yanlin

AU - Jiang, Ke-Jian

PY - 2019/9

Y1 - 2019/9

N2 - The deposition of a uniform and dense tin-based perovskite layer with low defect-caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn2+ to Sn4+ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N2H4)3(HI)2) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI3) perovskite layer. The resultant FASnI3 layer is homogeneous with full surface coverage; moreover, the content of Sn4+ is significantly reduced in the film from the SnI2 precursor owing to the reductive property of (N2H4)3(HI)2. With the high-quality FASnI3 layer as a light absorber, planar-heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead-free tin-based perovskite solar cells.

AB - The deposition of a uniform and dense tin-based perovskite layer with low defect-caused background carrier density is crucial for achieving efficient tin perovskite solar cells (PSCs). These defects are mainly caused by the rapid oxidation of Sn2+ to Sn4+ in tin perovskite during device fabrication. Herein, trihydrazine dihydriodide ((N2H4)3(HI)2) is used as an additive for solution deposition of a formamidinium tin iodide (FASnI3) perovskite layer. The resultant FASnI3 layer is homogeneous with full surface coverage; moreover, the content of Sn4+ is significantly reduced in the film from the SnI2 precursor owing to the reductive property of (N2H4)3(HI)2. With the high-quality FASnI3 layer as a light absorber, planar-heterojunction perovskite solar cells are fabricated, exhibiting a maximum power conversion efficiency of 8.48% and good reproducibility. This work opens new possibilities for achieving efficient lead-free tin-based perovskite solar cells.

KW - lead-free

KW - morphology

KW - perovskite solar cell

KW - trihydrazine dihydriodide

KW - HALIDE PEROVSKITES

KW - PERFORMANCE

KW - STABILITY

KW - FILMS

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U2 - 10.1002/solr.201900285

DO - 10.1002/solr.201900285

M3 - RGC 21 - Publication in refereed journal

SN - 2367-198X

VL - 3

JO - Solar RRL

JF - Solar RRL

IS - 8

M1 - 1900285

ER -

Trihydrazine Dihydriodide-Assisted Fabrication of Efficient Formamidinium Tin Iodide Perovskite Solar Cells

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