Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells

Awni, Rasha A.; Song, Zhaoning; Chen, Cong; Li, Chongwen; Wang, Changlei; Razooqi, Mohammed A.; Chen, Lei; Wang, Xiaoming; Ellingson, Randy J.; Li, Jian V.; Yan, Yanfa

doi:10.1016/j.joule.2020.01.012

Title: Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells

Journal Article · Wed Feb 12 00:00:00 EST 2020 · Joule

DOI:https://doi.org/10.1016/j.joule.2020.01.012· OSTI ID:1599340

Awni, Rasha A. ^[1]; Song, Zhaoning ^[2]; Chen, Cong ^[2]; Li, Chongwen ^[2]; Wang, Changlei ^[2]; Razooqi, Mohammed A. ^[2]; Chen, Lei ^[2]; Wang, Xiaoming ^[2]; Ellingson, Randy J. ^[2]; Li, Jian V. ^[3]; Yan, Yanfa ^[2]

Univ. of Toledo, OH (United States); Univ. of Tikrit (Iraq)
Univ. of Toledo, OH (United States)
National Cheng Kung Univ., Tainan City (Taiwan)

Capacitance-based techniques were previously used to measure the electrical properties of halide perovskite solar cells (PSCs) such as defect activation energy and density, carrier concentration, and dielectric constant, which provide key information for evaluating the device performance. Herein, we show that capacitance-based techniques cannot be used to reliably analyze the properties of defects in the perovskite layer or at its interface, since the high-frequency capacitance signature is due to the response of charge carriers in the hole-transport layer (HTL). For HTL-free PSCs, the high-frequency capacitance can be considered as the geometric capacitance for analyzing the dielectric constant of the perovskite layer, since there is no trapping and de-trapping of charge carriers in the perovskite layer. We also find that the low-frequency capacitance signature can be used to calculate the activation energy of the ionic conductivity of the perovskite layer, but the overlapping effects with charge transport materials must be avoided.

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Research Organization:: Univ. of Toledo, OH (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; Air Force Research Laboratory (AFRL); National Science Foundation (NSF)

Grant/Contract Number:: EE0008753; FA9453-18-2-0037; DMR-1807818

OSTI ID:: 1599340

Alternate ID(s):: OSTI ID: 1704032

Journal Information:: Joule, Vol. 4, Issue 3; ISSN 2542-4351

Publisher:: Elsevier - Cell PressCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 31 works

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Title: Influence of Charge Transport Layers on Capacitance Measured in Halide Perovskite Solar Cells

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