PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Di Huang; Tenghooi Goh; Lyndsey McMillon-Brown; Jaemin Kong; Yifan Zheng; Jiao Zhao; Yang Li; Suling Zhao; Zheng Xu; André D. Taylor

doi:10.1021/acsami.8b05949

PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Di Huang, Tenghooi Goh, Lyndsey McMillon-Brown, Jaemin Kong, Yifan Zheng, Jiao Zhao, Yang Li, Suling Zhao, Zheng Xu, André D. Taylor

Chemical and Biomolecular Engineering

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

Abstract

The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CH₃NH₃PbI₃ Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high V_oc values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.

Original language	English (US)
Pages (from-to)	25329-25336
Number of pages	8
Journal	ACS Applied Materials and Interfaces
Volume	10
Issue number	30
DOIs	https://doi.org/10.1021/acsami.8b05949
State	Published - Aug 1 2018

Keywords

PEDOT:PSS
PEOz
V
hysteresis
perovskite solar cells

ASJC Scopus subject areas

General Materials Science

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10.1021/acsami.8b05949

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title = "PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell",

abstract = "The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CH3NH3PbI3 Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high Voc values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.",

keywords = "PEDOT:PSS, PEOz, V, hysteresis, perovskite solar cells",

author = "Di Huang and Tenghooi Goh and Lyndsey McMillon-Brown and Jaemin Kong and Yifan Zheng and Jiao Zhao and Yang Li and Suling Zhao and Zheng Xu and Taylor, {Andr{\'e} D.}",

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month = aug,

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doi = "10.1021/acsami.8b05949",

language = "English (US)",

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AU - Huang, Di

AU - Goh, Tenghooi

AU - McMillon-Brown, Lyndsey

AU - Kong, Jaemin

AU - Zheng, Yifan

AU - Zhao, Jiao

AU - Li, Yang

AU - Zhao, Suling

AU - Xu, Zheng

AU - Taylor, André D.

PY - 2018/8/1

Y1 - 2018/8/1

N2 - The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CH3NH3PbI3 Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high Voc values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.

AB - The successful commercialization of perovskite solar cells (Pvs-SCs) calls for the need to find low-temperature processable interlayers with outstanding charge-transport features. In this work, we strategically blend poly(2-ethyl-2-oxazoline) (PEOz) with PEDOT:PSS as the modified hole transport layer (HTL) to achieve high-efficiency P-I-N CH3NH3PbI3 Pvs-SCs. The PEOz-PEDOT:PSS HTL exhibits enhanced features over the conventional layer including the following: (1) promoting perovskite with enlarged grain sizes to decrease the perovskite layer's recombination, (2) increasing the work function of the HTL, and (3) decreasing the noncapacitive current in Pvs-SCs. Remarkably, we demonstrate a 17.39% power conversion efficiency with very low hysteresis and high Voc values of 1.075 V for Pvs-SCs with PEOz-PEDOT:PSS.

KW - PEDOT:PSS

KW - PEOz

KW - V

KW - hysteresis

KW - perovskite solar cells

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PEOz-PEDOT:PSS Composite Layer: A Route to Suppressed Hysteresis and Enhanced Open-Circuit Voltage in a Planar Perovskite Solar Cell

Abstract

Keywords

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