Low temperature processed PEDOT:PSS/VOx bilayer for hysteresis-free and stable perovskite solar cells

Ligang Xu; Mengyuan Qian; Qing Lu; Hongmei Zhang; Wei Huang

doi:10.1016/j.matlet.2018.10.063

Low temperature processed PEDOT:PSS/VO_x bilayer for hysteresis-free and stable perovskite solar cells

Ligang Xu, Mengyuan Qian, Qing Lu, Hongmei Zhang, Wei Huang

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

21 Scopus citations

Abstract

Planar perovskite solar cells (PSCs) have attracted tremendous attention because of their excellent photovoltaic efficiencies and low temperature fabrication. However, most of the PSCs showed low open circuit voltage due to imperfect band alignment between poly(3,4-ethylenedioxythiophene): poly (styrene suffocate) (PEDOT:PSS) and perovskite, which lead to limited performance. In this letter, low temperature solution processed VO_x film is used as a hole transport layer (HTL) to modified PEDOT:PSS for inverted PSCs, which could modify the Fermi energy of pristine PEDOT:PSS HTL, resulting in an improved band alignment and increasing open circuit voltage The optimized device shows nearly free hysteresis with maximum power conversion efficiency (PCE) up to 14.22%, which shows better stability than the performance of the device based on PEDOT:PSS.

Original language	English
Pages (from-to)	16-18
Number of pages	3
Journal	Materials Letters
Volume	236
DOIs	https://doi.org/10.1016/j.matlet.2018.10.063
State	Published - 1 Feb 2019
Externally published	Yes

Keywords

Multilayer structure
Optical materials and properties
Perovskite solar cells
Solar energy materials
Stability
VOx

UN SDGs

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

Access to Document

10.1016/j.matlet.2018.10.063

Cite this

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title = "Low temperature processed PEDOT:PSS/VOx bilayer for hysteresis-free and stable perovskite solar cells",

abstract = "Planar perovskite solar cells (PSCs) have attracted tremendous attention because of their excellent photovoltaic efficiencies and low temperature fabrication. However, most of the PSCs showed low open circuit voltage due to imperfect band alignment between poly(3,4-ethylenedioxythiophene): poly (styrene suffocate) (PEDOT:PSS) and perovskite, which lead to limited performance. In this letter, low temperature solution processed VOx film is used as a hole transport layer (HTL) to modified PEDOT:PSS for inverted PSCs, which could modify the Fermi energy of pristine PEDOT:PSS HTL, resulting in an improved band alignment and increasing open circuit voltage The optimized device shows nearly free hysteresis with maximum power conversion efficiency (PCE) up to 14.22%, which shows better stability than the performance of the device based on PEDOT:PSS.",

keywords = "Multilayer structure, Optical materials and properties, Perovskite solar cells, Solar energy materials, Stability, VOx",

author = "Ligang Xu and Mengyuan Qian and Qing Lu and Hongmei Zhang and Wei Huang",

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doi = "10.1016/j.matlet.2018.10.063",

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T1 - Low temperature processed PEDOT:PSS/VOx bilayer for hysteresis-free and stable perovskite solar cells

AU - Xu, Ligang

AU - Qian, Mengyuan

AU - Lu, Qing

AU - Zhang, Hongmei

AU - Huang, Wei

PY - 2019/2/1

Y1 - 2019/2/1

N2 - Planar perovskite solar cells (PSCs) have attracted tremendous attention because of their excellent photovoltaic efficiencies and low temperature fabrication. However, most of the PSCs showed low open circuit voltage due to imperfect band alignment between poly(3,4-ethylenedioxythiophene): poly (styrene suffocate) (PEDOT:PSS) and perovskite, which lead to limited performance. In this letter, low temperature solution processed VOx film is used as a hole transport layer (HTL) to modified PEDOT:PSS for inverted PSCs, which could modify the Fermi energy of pristine PEDOT:PSS HTL, resulting in an improved band alignment and increasing open circuit voltage The optimized device shows nearly free hysteresis with maximum power conversion efficiency (PCE) up to 14.22%, which shows better stability than the performance of the device based on PEDOT:PSS.

AB - Planar perovskite solar cells (PSCs) have attracted tremendous attention because of their excellent photovoltaic efficiencies and low temperature fabrication. However, most of the PSCs showed low open circuit voltage due to imperfect band alignment between poly(3,4-ethylenedioxythiophene): poly (styrene suffocate) (PEDOT:PSS) and perovskite, which lead to limited performance. In this letter, low temperature solution processed VOx film is used as a hole transport layer (HTL) to modified PEDOT:PSS for inverted PSCs, which could modify the Fermi energy of pristine PEDOT:PSS HTL, resulting in an improved band alignment and increasing open circuit voltage The optimized device shows nearly free hysteresis with maximum power conversion efficiency (PCE) up to 14.22%, which shows better stability than the performance of the device based on PEDOT:PSS.

KW - Multilayer structure

KW - Optical materials and properties

KW - Perovskite solar cells

KW - Solar energy materials

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