Highly Efficient Perovskite Solar Cells with Ba(OH)2 Interface Modification of Mesoporous TiO2 Electron Transport Layer

M. Thambidurai; Herlina Arianita Dewi; P. C. Harikesh; Shini Foo; K. M. Muhammed Salim; Nripan Mathews; Cuong Dang

doi:10.1021/acsaem.8b01271

Highly Efficient Perovskite Solar Cells with Ba(OH)₂ Interface Modification of Mesoporous TiO₂ Electron Transport Layer

M. Thambidurai, Herlina Arianita Dewi, P. C. Harikesh, Shini Foo, K. M. Muhammed Salim, Nripan Mathews, Cuong Dang^*

^*Corresponding author for this work

Nanyang Technological University

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

14 Citations (Scopus)

Abstract

Outstanding photovoltaic performances together with some advantageous fabrication methods are the driving forces for recent research in perovskite solar devices. Interfacial engineering greatly influences the overall performance of the organic-inorganic perovskite solar cell as it alters energy band alignment, carrier recombination, and charge extraction/transport. In this work, Ba(OH)₂ was spun between the meso-TiO₂ electron transport and organic-inorganic perovskite absorber layers to engineer the interface and enhance the photovoltaic performance. Ba(OH)₂ modification shifted the conduction band of meso-TiO₂ upward such that better alignment with perovskite energy level, reduced carrier recombination, enhanced optical absorption, and electron transportation were observed. These enhancements led to paramount power conversion efficiency (PCE) of 17.53% for optimum Ba(OH)₂ concentration of 5 mg/mL spun on meso-TiO₂ but poorer PCE of 16.08% for the devices without interfacial treatment. Through this study, we demonstrated the use of interface modification as a straightforward yet powerful approach to enhance performances of conventional perovskite solar cells.

Original language	English
Pages (from-to)	5847-5852
Number of pages	6
Journal	ACS Applied Energy Materials
Volume	1
Issue number	11
DOIs	https://doi.org/10.1021/acsaem.8b01271
Publication status	Published - Nov 26 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© Copyright 2018 American Chemical Society.

ASJC Scopus Subject Areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

Keywords

barium hydroxide interface
electron transport layer
meso-TiO
perovskite solar cells
space charge limited current (SCLC)

UN SDGs

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

Access to Document

10.1021/acsaem.8b01271

Cite this

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title = "Highly Efficient Perovskite Solar Cells with Ba(OH)2 Interface Modification of Mesoporous TiO2 Electron Transport Layer",

abstract = "Outstanding photovoltaic performances together with some advantageous fabrication methods are the driving forces for recent research in perovskite solar devices. Interfacial engineering greatly influences the overall performance of the organic-inorganic perovskite solar cell as it alters energy band alignment, carrier recombination, and charge extraction/transport. In this work, Ba(OH)2 was spun between the meso-TiO2 electron transport and organic-inorganic perovskite absorber layers to engineer the interface and enhance the photovoltaic performance. Ba(OH)2 modification shifted the conduction band of meso-TiO2 upward such that better alignment with perovskite energy level, reduced carrier recombination, enhanced optical absorption, and electron transportation were observed. These enhancements led to paramount power conversion efficiency (PCE) of 17.53\% for optimum Ba(OH)2 concentration of 5 mg/mL spun on meso-TiO2 but poorer PCE of 16.08\% for the devices without interfacial treatment. Through this study, we demonstrated the use of interface modification as a straightforward yet powerful approach to enhance performances of conventional perovskite solar cells.",

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AU - Thambidurai, M.

AU - Dewi, Herlina Arianita

AU - Harikesh, P. C.

AU - Foo, Shini

AU - Muhammed Salim, K. M.

AU - Mathews, Nripan

AU - Dang, Cuong

PY - 2018/11/26

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KW - barium hydroxide interface

KW - electron transport layer

KW - meso-TiO

KW - perovskite solar cells

KW - space charge limited current (SCLC)

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