Improved performance of sol–gel ZnO-based perovskite solar cells via TiCl4 interfacial modification

Yohan Ko; Yechan Kim; Seong Young Kong; Sakeerali Cheeran Kunnan; Yongseok Jun

doi:10.1016/j.solmat.2018.04.021

Improved performance of sol–gel ZnO-based perovskite solar cells via TiCl₄ interfacial modification

Yohan Ko, Yechan Kim, Seong Young Kong, Sakeerali Cheeran Kunnan, Yongseok Jun

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

36 Citations (Scopus)

Abstract

CH₃NH₃PbI₃ perovskite materials deposited on ZnO electron transport layers (ETLs) undergo decomposition during annealing in N₂ atmosphere. We found that this decomposition can be retarded by restricting sublimation. Moreover, the decomposition upon thermal annealing is highly suppressed by TiCl₄ treatment of the ZnO ETLs. Finally, we present a facile method for prolonged annealing in sol–gel ZnO-based perovskite solar cells, which exhibit a power conversion efficiency of 16.5% at a small area of 0.098 cm² and 15.1% at a large area of 1 cm² (active area) under AM 1.5 simulated sunlight illumination. This study shows that TiCl₄ hydrolysis is an effective surface treatment for ZnO ETLs to be used in low-temperature and efficient sol–gel ZnO-based perovskite solar cells.

Original language	English
Pages (from-to)	157-163
Number of pages	7
Journal	Solar Energy Materials and Solar Cells
Volume	183
DOIs	https://doi.org/10.1016/j.solmat.2018.04.021
Publication status	Published - 2018 Aug 15
Externally published	Yes

Keywords

Interfacial modification
Perovskite solar cell
Sol–gel ZnO
TiCl

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Surfaces, Coatings and Films

UN SDGs

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

Access to Document

10.1016/j.solmat.2018.04.021

Cite this

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title = "Improved performance of sol–gel ZnO-based perovskite solar cells via TiCl4 interfacial modification",

abstract = "CH3NH3PbI3 perovskite materials deposited on ZnO electron transport layers (ETLs) undergo decomposition during annealing in N2 atmosphere. We found that this decomposition can be retarded by restricting sublimation. Moreover, the decomposition upon thermal annealing is highly suppressed by TiCl4 treatment of the ZnO ETLs. Finally, we present a facile method for prolonged annealing in sol–gel ZnO-based perovskite solar cells, which exhibit a power conversion efficiency of 16.5% at a small area of 0.098 cm2 and 15.1% at a large area of 1 cm2 (active area) under AM 1.5 simulated sunlight illumination. This study shows that TiCl4 hydrolysis is an effective surface treatment for ZnO ETLs to be used in low-temperature and efficient sol–gel ZnO-based perovskite solar cells.",

keywords = "Interfacial modification, Perovskite solar cell, Sol–gel ZnO, TiCl",

author = "Yohan Ko and Yechan Kim and Kong, {Seong Young} and Kunnan, {Sakeerali Cheeran} and Yongseok Jun",

note = "Funding Information: This research work was supported by Konkuk University in 2016. Publisher Copyright: {\textcopyright} 2018",

year = "2018",

month = aug,

day = "15",

doi = "10.1016/j.solmat.2018.04.021",

language = "English",

volume = "183",

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journal = "Solar Energy Materials and Solar Cells",

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T1 - Improved performance of sol–gel ZnO-based perovskite solar cells via TiCl4 interfacial modification

AU - Ko, Yohan

AU - Kim, Yechan

AU - Kong, Seong Young

AU - Kunnan, Sakeerali Cheeran

AU - Jun, Yongseok

PY - 2018/8/15

Y1 - 2018/8/15

N2 - CH3NH3PbI3 perovskite materials deposited on ZnO electron transport layers (ETLs) undergo decomposition during annealing in N2 atmosphere. We found that this decomposition can be retarded by restricting sublimation. Moreover, the decomposition upon thermal annealing is highly suppressed by TiCl4 treatment of the ZnO ETLs. Finally, we present a facile method for prolonged annealing in sol–gel ZnO-based perovskite solar cells, which exhibit a power conversion efficiency of 16.5% at a small area of 0.098 cm2 and 15.1% at a large area of 1 cm2 (active area) under AM 1.5 simulated sunlight illumination. This study shows that TiCl4 hydrolysis is an effective surface treatment for ZnO ETLs to be used in low-temperature and efficient sol–gel ZnO-based perovskite solar cells.

AB - CH3NH3PbI3 perovskite materials deposited on ZnO electron transport layers (ETLs) undergo decomposition during annealing in N2 atmosphere. We found that this decomposition can be retarded by restricting sublimation. Moreover, the decomposition upon thermal annealing is highly suppressed by TiCl4 treatment of the ZnO ETLs. Finally, we present a facile method for prolonged annealing in sol–gel ZnO-based perovskite solar cells, which exhibit a power conversion efficiency of 16.5% at a small area of 0.098 cm2 and 15.1% at a large area of 1 cm2 (active area) under AM 1.5 simulated sunlight illumination. This study shows that TiCl4 hydrolysis is an effective surface treatment for ZnO ETLs to be used in low-temperature and efficient sol–gel ZnO-based perovskite solar cells.

KW - Interfacial modification

KW - Perovskite solar cell

KW - Sol–gel ZnO

KW - TiCl

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