Ambient processed and stable all-inorganic lead halide perovskite solar cells with efficiencies nearing 20% using a spray coated Zn1−xCsxO electron transport layer

Sawanta S. Mali; Jyoti V. Patil; Julian A. Steele; Chang Kook Hong

doi:10.1016/j.nanoen.2021.106597

Ambient processed and stable all-inorganic lead halide perovskite solar cells with efficiencies nearing 20% using a spray coated Zn1−xCsxO electron transport layer

Sawanta S. Mali^*, Jyoti V. Patil, Julian A. Steele, Chang Kook Hong^*

^*Corresponding author for this work

Pure And Applied Chemistry

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

Achieving ambient-processed and stable all-inorganic halide perovskite solar cells with high conversion efficiencies is a well-established goal within the halide perovskite research community. In striving for this, electron transporting layers based on common TiO2 and SnO2 nanoparticles have been widely deployed, however, can stifle device performance due to their requirement for high temperature processing and non-uniform layer deposition. Using a low-temperature processed Cs-doped ZnO nanocrystalline electron transport layer and a narrow-bandgap (~1.70 eV) all-inorganic absorber (Cd-doped CsPbI2.5Br0.5), we report ambient-processed solar cells which exhibit high conversion efficiencies (>19.75%) and stable performance under ambient condition (>300 h). A smooth interface is established by combining spray-deposition of the electron transport layer and injection of hot-air during the perovskite deposition, which crystallizes smooth, compact perovskite thin films directly from solution. The high performance is attributed to preserving a solar-friendly and phase-stable perovskite layer, along with improved charge carrier management.

Original language	English
Article number	106597
Journal	Nano Energy
Volume	90
Issue number	Part A
Early online date	7 Oct 2021
DOIs	https://doi.org/10.1016/j.nanoen.2021.106597
Publication status	Published - Dec 2021

Funding

This work was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2018R1A6A1A03024334 ). This work was also supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) ( 2018R1C1B6008218 ). This work was also supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology ( 2020R1A2C2004880 ). J.A.S. acknowledges financial support from the Research Foundation - Flanders (FWO) through a postdoctoral fellowship (Grant No. 12Y7221N ).

Keywords

Electron transporting layer
All-inorganic perovskite
Cadmium doping
Narrow band gap
Phase stability
High efficiency

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@article{1749115301c847958d2de76341098913,

title = "Ambient processed and stable all-inorganic lead halide perovskite solar cells with efficiencies nearing 20% using a spray coated Zn1−xCsxO electron transport layer",

abstract = "Achieving ambient-processed and stable all-inorganic halide perovskite solar cells with high conversion efficiencies is a well-established goal within the halide perovskite research community. In striving for this, electron transporting layers based on common TiO2 and SnO2 nanoparticles have been widely deployed, however, can stifle device performance due to their requirement for high temperature processing and non-uniform layer deposition. Using a low-temperature processed Cs-doped ZnO nanocrystalline electron transport layer and a narrow-bandgap (~1.70 eV) all-inorganic absorber (Cd-doped CsPbI2.5Br0.5), we report ambient-processed solar cells which exhibit high conversion efficiencies (>19.75%) and stable performance under ambient condition (>300 h). A smooth interface is established by combining spray-deposition of the electron transport layer and injection of hot-air during the perovskite deposition, which crystallizes smooth, compact perovskite thin films directly from solution. The high performance is attributed to preserving a solar-friendly and phase-stable perovskite layer, along with improved charge carrier management.",

keywords = "Electron transporting layer, All-inorganic perovskite, Cadmium doping, Narrow band gap, Phase stability, High efficiency",

author = "Mali, {Sawanta S.} and Patil, {Jyoti V.} and Steele, {Julian A.} and Hong, {Chang Kook}",

year = "2021",

month = dec,

doi = "10.1016/j.nanoen.2021.106597",

language = "English",

volume = "90",

journal = "Nano Energy",

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AU - Mali, Sawanta S.

AU - Patil, Jyoti V.

AU - Steele, Julian A.

AU - Hong, Chang Kook

PY - 2021/12

Y1 - 2021/12

N2 - Achieving ambient-processed and stable all-inorganic halide perovskite solar cells with high conversion efficiencies is a well-established goal within the halide perovskite research community. In striving for this, electron transporting layers based on common TiO2 and SnO2 nanoparticles have been widely deployed, however, can stifle device performance due to their requirement for high temperature processing and non-uniform layer deposition. Using a low-temperature processed Cs-doped ZnO nanocrystalline electron transport layer and a narrow-bandgap (~1.70 eV) all-inorganic absorber (Cd-doped CsPbI2.5Br0.5), we report ambient-processed solar cells which exhibit high conversion efficiencies (>19.75%) and stable performance under ambient condition (>300 h). A smooth interface is established by combining spray-deposition of the electron transport layer and injection of hot-air during the perovskite deposition, which crystallizes smooth, compact perovskite thin films directly from solution. The high performance is attributed to preserving a solar-friendly and phase-stable perovskite layer, along with improved charge carrier management.

AB - Achieving ambient-processed and stable all-inorganic halide perovskite solar cells with high conversion efficiencies is a well-established goal within the halide perovskite research community. In striving for this, electron transporting layers based on common TiO2 and SnO2 nanoparticles have been widely deployed, however, can stifle device performance due to their requirement for high temperature processing and non-uniform layer deposition. Using a low-temperature processed Cs-doped ZnO nanocrystalline electron transport layer and a narrow-bandgap (~1.70 eV) all-inorganic absorber (Cd-doped CsPbI2.5Br0.5), we report ambient-processed solar cells which exhibit high conversion efficiencies (>19.75%) and stable performance under ambient condition (>300 h). A smooth interface is established by combining spray-deposition of the electron transport layer and injection of hot-air during the perovskite deposition, which crystallizes smooth, compact perovskite thin films directly from solution. The high performance is attributed to preserving a solar-friendly and phase-stable perovskite layer, along with improved charge carrier management.

KW - Electron transporting layer

KW - All-inorganic perovskite

KW - Cadmium doping

KW - Narrow band gap

KW - Phase stability

KW - High efficiency

U2 - 10.1016/j.nanoen.2021.106597

DO - 10.1016/j.nanoen.2021.106597

M3 - Article

SN - 2211-2855

VL - 90

JO - Nano Energy

JF - Nano Energy

IS - Part A

M1 - 106597

ER -

Ambient processed and stable all-inorganic lead halide perovskite solar cells with efficiencies nearing 20% using a spray coated Zn1−xCsxO electron transport layer

Abstract

Funding

Keywords

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