Enhanced electronic transport in Fe3+-doped TiO2 for high efficiency perovskite solar cells

Xiangling Gu; Yafei Wang; Ting Zhang; Detao Liu; Rui Zhang; Peng Zhang; Jiang Wu; Zhi David Chen; Shibin Li

doi:10.1039/c7tc03845c

Enhanced electronic transport in Fe³⁺-doped TiO₂ for high efficiency perovskite solar cells

Xiangling Gu, Yafei Wang, Ting Zhang, Detao Liu, Rui Zhang, Peng Zhang, Jiang Wu, Zhi David Chen, Shibin Li

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

73 Scopus citations

Abstract

Oxygen vacancies in non-stoichiometric TiO₂ electron transport layers can capture injected electrons and act as recombination centers. In this study, the compact TiO₂ electron transport layers of perovskite solar cells (PSCs) are doped with different molar ratios of Fe³⁺ in order to passivate such defects and improve their electron transport properties. The electrical conductivity, absorption, crystal structure, and the performance of the PSCs are systematically studied. It shows that Fe³⁺-doping improves the conductivity of TiO₂ compact layers compared with the pristine TiO₂, boosting the photovoltaic performance of PSCs. The reduced trap-filled limit voltage (V_TFL) of the Fe³⁺-doped TiO₂ compact layers suggests that trap density in the Fe³⁺-TiO₂ films is much lower than that of a pristine TiO₂ film. With the optimized doping concentration (1 mol%) of Fe³⁺, the best power conversion efficiency of PSCs is improved from 16.02% to 18.60%.

Original language	English
Pages (from-to)	10754-10760
Number of pages	7
Journal	Journal of Materials Chemistry C
Volume	5
Issue number	41
DOIs	https://doi.org/10.1039/c7tc03845c
State	Published - 2017

Bibliographical note

Funding Information:
This work was supported by the National Natural Science Foundation of China under Grant No. 61421002, 61574029, 61471085, and 61371046. This work was also partially supported by the University of Kentucky.

Publisher Copyright:
© 2017 The Royal Society of Chemistry.

ASJC Scopus subject areas

Chemistry (all)
Materials Chemistry

UN SDGs

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

Access to Document

10.1039/c7tc03845c

Cite this

@article{742f44a2c5b64e66a34ad79597a1cfd1,

title = "Enhanced electronic transport in Fe3+-doped TiO2 for high efficiency perovskite solar cells",

abstract = "Oxygen vacancies in non-stoichiometric TiO2 electron transport layers can capture injected electrons and act as recombination centers. In this study, the compact TiO2 electron transport layers of perovskite solar cells (PSCs) are doped with different molar ratios of Fe3+ in order to passivate such defects and improve their electron transport properties. The electrical conductivity, absorption, crystal structure, and the performance of the PSCs are systematically studied. It shows that Fe3+-doping improves the conductivity of TiO2 compact layers compared with the pristine TiO2, boosting the photovoltaic performance of PSCs. The reduced trap-filled limit voltage (VTFL) of the Fe3+-doped TiO2 compact layers suggests that trap density in the Fe3+-TiO2 films is much lower than that of a pristine TiO2 film. With the optimized doping concentration (1 mol%) of Fe3+, the best power conversion efficiency of PSCs is improved from 16.02% to 18.60%.",

author = "Xiangling Gu and Yafei Wang and Ting Zhang and Detao Liu and Rui Zhang and Peng Zhang and Jiang Wu and Chen, {Zhi David} and Shibin Li",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China under Grant No. 61421002, 61574029, 61471085, and 61371046. This work was also partially supported by the University of Kentucky. Publisher Copyright: {\textcopyright} 2017 The Royal Society of Chemistry.",

year = "2017",

doi = "10.1039/c7tc03845c",

language = "English",

volume = "5",

pages = "10754--10760",

number = "41",

}

TY - JOUR

T1 - Enhanced electronic transport in Fe3+-doped TiO2 for high efficiency perovskite solar cells

AU - Gu, Xiangling

AU - Wang, Yafei

AU - Zhang, Ting

AU - Liu, Detao

AU - Zhang, Rui

AU - Zhang, Peng

AU - Wu, Jiang

AU - Chen, Zhi David

AU - Li, Shibin

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China under Grant No. 61421002, 61574029, 61471085, and 61371046. This work was also partially supported by the University of Kentucky. Publisher Copyright: © 2017 The Royal Society of Chemistry.

PY - 2017

Y1 - 2017

N2 - Oxygen vacancies in non-stoichiometric TiO2 electron transport layers can capture injected electrons and act as recombination centers. In this study, the compact TiO2 electron transport layers of perovskite solar cells (PSCs) are doped with different molar ratios of Fe3+ in order to passivate such defects and improve their electron transport properties. The electrical conductivity, absorption, crystal structure, and the performance of the PSCs are systematically studied. It shows that Fe3+-doping improves the conductivity of TiO2 compact layers compared with the pristine TiO2, boosting the photovoltaic performance of PSCs. The reduced trap-filled limit voltage (VTFL) of the Fe3+-doped TiO2 compact layers suggests that trap density in the Fe3+-TiO2 films is much lower than that of a pristine TiO2 film. With the optimized doping concentration (1 mol%) of Fe3+, the best power conversion efficiency of PSCs is improved from 16.02% to 18.60%.

AB - Oxygen vacancies in non-stoichiometric TiO2 electron transport layers can capture injected electrons and act as recombination centers. In this study, the compact TiO2 electron transport layers of perovskite solar cells (PSCs) are doped with different molar ratios of Fe3+ in order to passivate such defects and improve their electron transport properties. The electrical conductivity, absorption, crystal structure, and the performance of the PSCs are systematically studied. It shows that Fe3+-doping improves the conductivity of TiO2 compact layers compared with the pristine TiO2, boosting the photovoltaic performance of PSCs. The reduced trap-filled limit voltage (VTFL) of the Fe3+-doped TiO2 compact layers suggests that trap density in the Fe3+-TiO2 films is much lower than that of a pristine TiO2 film. With the optimized doping concentration (1 mol%) of Fe3+, the best power conversion efficiency of PSCs is improved from 16.02% to 18.60%.

UR - http://www.scopus.com/inward/record.url?scp=85032588739&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85032588739&partnerID=8YFLogxK

U2 - 10.1039/c7tc03845c

DO - 10.1039/c7tc03845c

M3 - Article

AN - SCOPUS:85032588739

VL - 5

SP - 10754

EP - 10760

IS - 41

ER -