Hysteresis-less mesoscopic CH3NH3PbI3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode

Jin Hyuck Heo; Myoung Sang You; Min Hyuk Chang; Wenping Yin; Tae Kyu Ahn; Sang Ju Lee; Shi Joon Sung; Dae Hwan Kim; Sang Hyuk Im

doi:10.1016/j.nanoen.2015.05.014

Hysteresis-less mesoscopic CH₃NH₃PbI₃ perovskite hybrid solar cells by introduction of Li-treated TiO₂ electrode

Jin Hyuck Heo, Myoung Sang You, Min Hyuk Chang, Wenping Yin, Tae Kyu Ahn, Sang Ju Lee, Shi Joon Sung, Dae Hwan Kim, Sang Hyuk Im

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

199 Citations (Scopus)

Abstract

A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH₃NH₃PbI₃ (MAPbI₃) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO₂ electrode. The Li-treated mesoscopic TiO₂ electrode improved charge separation/injection from MAPbI₃ into mesoscopic TiO₂, charge transport in mesoscopic TiO₂, and surface traps because the conduction band edge of mesoscopic TiO₂ was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10^-6cm²/Vs to ~2.5×10^-6cm²/Vs, the conductivity of mesoscopic TiO₂ was increased from ~5.6×10^-7S/cm to ~1.6×10^-6S/cm, and the trap density was reduced from ~1.2×10¹⁶cm^-3 to ~9.3×10¹⁵cm^-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO₂.

Original language	English
Pages (from-to)	530-539
Number of pages	10
Journal	Nano Energy
Volume	15
DOIs	https://doi.org/10.1016/j.nanoen.2015.05.014
Publication status	Published - 2015 Jul 1
Externally published	Yes

Keywords

Hybrid solar cells
J-V hysteresis
Li-treatment
Methylammoniumleadtriiodide
Perovskite

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
Materials Science(all)
Electrical and Electronic Engineering

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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Hysteresis-less mesoscopic CH₃NH₃PbI₃ perovskite hybrid solar cells by introduction of Li-treated TiO₂ electrode. / Heo, Jin Hyuck; You, Myoung Sang; Chang, Min Hyuk; Yin, Wenping; Ahn, Tae Kyu; Lee, Sang Ju; Sung, Shi Joon; Kim, Dae Hwan; Im, Sang Hyuk.

In: Nano Energy, Vol. 15, 01.07.2015, p. 530-539.

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

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title = "Hysteresis-less mesoscopic CH3NH3PbI3 perovskite hybrid solar cells by introduction of Li-treated TiO2 electrode",

abstract = "A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.",

keywords = "Hybrid solar cells, J-V hysteresis, Li-treatment, Methylammoniumleadtriiodide, Perovskite",

author = "Heo, {Jin Hyuck} and You, {Myoung Sang} and Chang, {Min Hyuk} and Wenping Yin and Ahn, {Tae Kyu} and Lee, {Sang Ju} and Sung, {Shi Joon} and Kim, {Dae Hwan} and Im, {Sang Hyuk}",

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AU - You, Myoung Sang

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AU - Yin, Wenping

AU - Ahn, Tae Kyu

AU - Lee, Sang Ju

AU - Sung, Shi Joon

AU - Kim, Dae Hwan

AU - Im, Sang Hyuk

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AB - A great current density-voltage (J-V) hysteresis with respect to the scan direction is important issue in perovskite hybrid solar cells because the power conversion efficiency is sometimes incorrect. Here, we demonstrated >17% mesoscopic CH3NH3PbI3 (MAPbI3) perovskite hybride solar cells without significant J-V hysteresis with respective to the scan direction and rated by using Li-treated mesoscopic TiO2 electrode. The Li-treated mesoscopic TiO2 electrode improved charge separation/injection from MAPbI3 into mesoscopic TiO2, charge transport in mesoscopic TiO2, and surface traps because the conduction band edge of mesoscopic TiO2 was lowered by ~0.1eV, the mobility of charge carriers was increased from ~1.1×10-6cm2/Vs to ~2.5×10-6cm2/Vs, the conductivity of mesoscopic TiO2 was increased from ~5.6×10-7S/cm to ~1.6×10-6S/cm, and the trap density was reduced from ~1.2×1016cm-3 to ~9.3×1015cm-3 through Li-treatment. Therefore, the average power conversion efficiency was significantly enhanced from 14.84% to 17.26% at 1sun condition by the Li-treatment of mesoscopic TiO2.

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