Low-Temperature TiOx Compact Layer for Planar Heterojunction Perovskite Solar Cells

Zonghao Liu; Qi Chen; Ziruo Hong; Huanping Zhou; Xiaobao Xu; Nicholas De Marco; Pengyu Sun; Zhixin Zhao; Yi Bing Cheng; Yang Yang

doi:10.1021/acsami.5b12123

Low-Temperature TiO_x Compact Layer for Planar Heterojunction Perovskite Solar Cells

Zonghao Liu, Qi Chen, Ziruo Hong, Huanping Zhou, Xiaobao Xu, Nicholas De Marco, Pengyu Sun, Zhixin Zhao^*, Yi Bing Cheng, Yang Yang

^*Corresponding author for this work

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

104 Citations (Scopus)

Abstract

Here, we demonstrate an effective low-temperature approach to fabricate a uniform and pinhole-free compact TiO₂ layer for enhancing photovoltaic performance of perovskite solar cells. TiCl₄ was used to modify TiO₂ for efficient charge generation and significantly reduced recombination loss. We found that a TiO₂ layer with an appropriate TiCl₄ treatment possesses a smooth surface with full coverage of the conductive electrode. Further studies on charge carrier dynamics confirmed that the TiCl₄ treatment improves the contact of the TiO₂/perovskite interface, facilitating charge extraction and suppressing charge recombination. On the basis of the treatment, we improved the open circuit voltage from 1.01 V of the reference cell to 1.08 V, and achieved a power conversion efficiency of 16.4%.

Original language	English
Pages (from-to)	11076-11083
Number of pages	8
Journal	ACS applied materials & interfaces
Volume	8
Issue number	17
DOIs	https://doi.org/10.1021/acsami.5b12123
Publication status	Published - 4 May 2016
Externally published	Yes

Keywords

charge transport layer
low-temperature
perovskite solar cell
pinhole-free
surface modification

UN SDGs

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

Access to Document

10.1021/acsami.5b12123

Cite this

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title = "Low-Temperature TiOx Compact Layer for Planar Heterojunction Perovskite Solar Cells",

abstract = "Here, we demonstrate an effective low-temperature approach to fabricate a uniform and pinhole-free compact TiO2 layer for enhancing photovoltaic performance of perovskite solar cells. TiCl4 was used to modify TiO2 for efficient charge generation and significantly reduced recombination loss. We found that a TiO2 layer with an appropriate TiCl4 treatment possesses a smooth surface with full coverage of the conductive electrode. Further studies on charge carrier dynamics confirmed that the TiCl4 treatment improves the contact of the TiO2/perovskite interface, facilitating charge extraction and suppressing charge recombination. On the basis of the treatment, we improved the open circuit voltage from 1.01 V of the reference cell to 1.08 V, and achieved a power conversion efficiency of 16.4%.",

keywords = "charge transport layer, low-temperature, perovskite solar cell, pinhole-free, surface modification",

author = "Zonghao Liu and Qi Chen and Ziruo Hong and Huanping Zhou and Xiaobao Xu and {De Marco}, Nicholas and Pengyu Sun and Zhixin Zhao and Cheng, {Yi Bing} and Yang Yang",

note = "Publisher Copyright: {\textcopyright} 2016 American Chemical Society.",

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T1 - Low-Temperature TiOx Compact Layer for Planar Heterojunction Perovskite Solar Cells

AU - Liu, Zonghao

AU - Chen, Qi

AU - Hong, Ziruo

AU - Zhou, Huanping

AU - Xu, Xiaobao

AU - De Marco, Nicholas

AU - Sun, Pengyu

AU - Zhao, Zhixin

AU - Cheng, Yi Bing

AU - Yang, Yang

PY - 2016/5/4

Y1 - 2016/5/4

N2 - Here, we demonstrate an effective low-temperature approach to fabricate a uniform and pinhole-free compact TiO2 layer for enhancing photovoltaic performance of perovskite solar cells. TiCl4 was used to modify TiO2 for efficient charge generation and significantly reduced recombination loss. We found that a TiO2 layer with an appropriate TiCl4 treatment possesses a smooth surface with full coverage of the conductive electrode. Further studies on charge carrier dynamics confirmed that the TiCl4 treatment improves the contact of the TiO2/perovskite interface, facilitating charge extraction and suppressing charge recombination. On the basis of the treatment, we improved the open circuit voltage from 1.01 V of the reference cell to 1.08 V, and achieved a power conversion efficiency of 16.4%.

AB - Here, we demonstrate an effective low-temperature approach to fabricate a uniform and pinhole-free compact TiO2 layer for enhancing photovoltaic performance of perovskite solar cells. TiCl4 was used to modify TiO2 for efficient charge generation and significantly reduced recombination loss. We found that a TiO2 layer with an appropriate TiCl4 treatment possesses a smooth surface with full coverage of the conductive electrode. Further studies on charge carrier dynamics confirmed that the TiCl4 treatment improves the contact of the TiO2/perovskite interface, facilitating charge extraction and suppressing charge recombination. On the basis of the treatment, we improved the open circuit voltage from 1.01 V of the reference cell to 1.08 V, and achieved a power conversion efficiency of 16.4%.

KW - charge transport layer

KW - low-temperature

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KW - pinhole-free

KW - surface modification

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