Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

Jingjing Chang; Hai Zhu; Bichen Li; Furkan Halis Isikgor; Yue Hao; Qinghua Xu; Jianyong Ouyang

doi:10.1039/c5ta08398b

Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

Jingjing Chang, Hai Zhu, Bichen Li, Furkan Halis Isikgor, Yue Hao, Qinghua Xu^*, Jianyong Ouyang

^*Corresponding author for this work

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

142 Scopus citations

Abstract

Perovskite solar cells (PSCs) have received great attention due to their high power conversion efficiency and low fabrication cost. The perovskite layer is usually prepared from a solution of precursors. We found that the PbI₂ purity has a significant effect on the crystallinity, charge carrier dynamics, and photovoltaic properties of the perovskite films. Planar heterojunction PSCs using highly pure PbI₂ showed a high power conversion efficiency (PCE) of 16.4%, which was higher than that of control PSCs with low purity PbI₂ by 30-40%. Steady-state photoluminescence (PL), time-resolved PL (TR-PL) and femtosecond transient absorption measurements (FS-TA) revealed that impurities can lower the electron lifetime and increase the non-radiative recombination. This study implies that the PCEs of the perovskite solar cell devices could be further boosted by controlling the precursor purity.

Original language	English (US)
Pages (from-to)	887-893
Number of pages	7
Journal	JOURNAL OF MATERIALS CHEMISTRY A
Volume	4
Issue number	3
DOIs	https://doi.org/10.1039/c5ta08398b
State	Published - 2016

ASJC Scopus subject areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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10.1039/c5ta08398b

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title = "Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials",

abstract = "Perovskite solar cells (PSCs) have received great attention due to their high power conversion efficiency and low fabrication cost. The perovskite layer is usually prepared from a solution of precursors. We found that the PbI2 purity has a significant effect on the crystallinity, charge carrier dynamics, and photovoltaic properties of the perovskite films. Planar heterojunction PSCs using highly pure PbI2 showed a high power conversion efficiency (PCE) of 16.4%, which was higher than that of control PSCs with low purity PbI2 by 30-40%. Steady-state photoluminescence (PL), time-resolved PL (TR-PL) and femtosecond transient absorption measurements (FS-TA) revealed that impurities can lower the electron lifetime and increase the non-radiative recombination. This study implies that the PCEs of the perovskite solar cell devices could be further boosted by controlling the precursor purity.",

author = "Jingjing Chang and Hai Zhu and Bichen Li and Isikgor, {Furkan Halis} and Yue Hao and Qinghua Xu and Jianyong Ouyang",

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AU - Chang, Jingjing

AU - Zhu, Hai

AU - Li, Bichen

AU - Isikgor, Furkan Halis

AU - Hao, Yue

AU - Xu, Qinghua

AU - Ouyang, Jianyong

PY - 2016

Y1 - 2016

N2 - Perovskite solar cells (PSCs) have received great attention due to their high power conversion efficiency and low fabrication cost. The perovskite layer is usually prepared from a solution of precursors. We found that the PbI2 purity has a significant effect on the crystallinity, charge carrier dynamics, and photovoltaic properties of the perovskite films. Planar heterojunction PSCs using highly pure PbI2 showed a high power conversion efficiency (PCE) of 16.4%, which was higher than that of control PSCs with low purity PbI2 by 30-40%. Steady-state photoluminescence (PL), time-resolved PL (TR-PL) and femtosecond transient absorption measurements (FS-TA) revealed that impurities can lower the electron lifetime and increase the non-radiative recombination. This study implies that the PCEs of the perovskite solar cell devices could be further boosted by controlling the precursor purity.

AB - Perovskite solar cells (PSCs) have received great attention due to their high power conversion efficiency and low fabrication cost. The perovskite layer is usually prepared from a solution of precursors. We found that the PbI2 purity has a significant effect on the crystallinity, charge carrier dynamics, and photovoltaic properties of the perovskite films. Planar heterojunction PSCs using highly pure PbI2 showed a high power conversion efficiency (PCE) of 16.4%, which was higher than that of control PSCs with low purity PbI2 by 30-40%. Steady-state photoluminescence (PL), time-resolved PL (TR-PL) and femtosecond transient absorption measurements (FS-TA) revealed that impurities can lower the electron lifetime and increase the non-radiative recombination. This study implies that the PCEs of the perovskite solar cell devices could be further boosted by controlling the precursor purity.

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Boosting the performance of planar heterojunction perovskite solar cell by controlling the precursor purity of perovskite materials

Abstract

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