E-beam evaporated Nb2O5 as an effective electron transport layer for large flexible perovskite solar cells

Jiangshan Feng; Zhou Yang; Dong Yang; Xiaodong Ren; Xuejie Zhu; Zhiwen Jin; Wei Zi; Qingbo Wei; Shengzhong (Frank) Liu

doi:10.1016/j.nanoen.2017.04.010

E-beam evaporated Nb₂O₅ as an effective electron transport layer for large flexible perovskite solar cells

Jiangshan Feng, Zhou Yang, Dong Yang, Xiaodong Ren, Xuejie Zhu, Zhiwen Jin, Wei Zi, Qingbo Wei, Shengzhong (Frank) Liu

Materials Science and Engineering

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

220 Scopus citations

Abstract

E-beam evaporated Nb₂O₅ film is directly used as an effective electron transport layer (ETL) for perovskite solar cells without needing any posttreatment. The effect of Nb₂O₅ thickness on optical and electronic properties of the perovskite layer deposited thereupon are studied in detail. It is found that 60 nm thick Nb₂O₅ ETL delivers the best photovoltaic performance with PCE as high as 18.59%. In particular, e-beam evaporated Nb₂O₅ is found to be advantageous in large area flexible perovskite solar cells, with larger area cells showing comparable Jsc and Voc values as smaller area devices, and the PCE loss is mainly caused by increased series resistance leading to reduced FF. With proper cell design to limit the resistance and associated FF loss, it is expected that the large area cells should present respectable FF and PCEs as their smaller area devices.

Original language	English (US)
Pages (from-to)	1-8
Number of pages	8
Journal	Nano Energy
Volume	36
DOIs	https://doi.org/10.1016/j.nanoen.2017.04.010
State	Published - Jun 1 2017

All Science Journal Classification (ASJC) codes

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

UN SDGs

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

Access to Document

10.1016/j.nanoen.2017.04.010

Cite this

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title = "E-beam evaporated Nb2O5 as an effective electron transport layer for large flexible perovskite solar cells",

abstract = "E-beam evaporated Nb2O5 film is directly used as an effective electron transport layer (ETL) for perovskite solar cells without needing any posttreatment. The effect of Nb2O5 thickness on optical and electronic properties of the perovskite layer deposited thereupon are studied in detail. It is found that 60 nm thick Nb2O5 ETL delivers the best photovoltaic performance with PCE as high as 18.59%. In particular, e-beam evaporated Nb2O5 is found to be advantageous in large area flexible perovskite solar cells, with larger area cells showing comparable Jsc and Voc values as smaller area devices, and the PCE loss is mainly caused by increased series resistance leading to reduced FF. With proper cell design to limit the resistance and associated FF loss, it is expected that the large area cells should present respectable FF and PCEs as their smaller area devices.",

author = "Jiangshan Feng and Zhou Yang and Dong Yang and Xiaodong Ren and Xuejie Zhu and Zhiwen Jin and Wei Zi and Qingbo Wei and Liu, {Shengzhong (Frank)}",

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doi = "10.1016/j.nanoen.2017.04.010",

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T1 - E-beam evaporated Nb2O5 as an effective electron transport layer for large flexible perovskite solar cells

AU - Feng, Jiangshan

AU - Yang, Zhou

AU - Yang, Dong

AU - Ren, Xiaodong

AU - Zhu, Xuejie

AU - Jin, Zhiwen

AU - Zi, Wei

AU - Wei, Qingbo

AU - Liu, Shengzhong (Frank)

PY - 2017/6/1

Y1 - 2017/6/1

N2 - E-beam evaporated Nb2O5 film is directly used as an effective electron transport layer (ETL) for perovskite solar cells without needing any posttreatment. The effect of Nb2O5 thickness on optical and electronic properties of the perovskite layer deposited thereupon are studied in detail. It is found that 60 nm thick Nb2O5 ETL delivers the best photovoltaic performance with PCE as high as 18.59%. In particular, e-beam evaporated Nb2O5 is found to be advantageous in large area flexible perovskite solar cells, with larger area cells showing comparable Jsc and Voc values as smaller area devices, and the PCE loss is mainly caused by increased series resistance leading to reduced FF. With proper cell design to limit the resistance and associated FF loss, it is expected that the large area cells should present respectable FF and PCEs as their smaller area devices.

AB - E-beam evaporated Nb2O5 film is directly used as an effective electron transport layer (ETL) for perovskite solar cells without needing any posttreatment. The effect of Nb2O5 thickness on optical and electronic properties of the perovskite layer deposited thereupon are studied in detail. It is found that 60 nm thick Nb2O5 ETL delivers the best photovoltaic performance with PCE as high as 18.59%. In particular, e-beam evaporated Nb2O5 is found to be advantageous in large area flexible perovskite solar cells, with larger area cells showing comparable Jsc and Voc values as smaller area devices, and the PCE loss is mainly caused by increased series resistance leading to reduced FF. With proper cell design to limit the resistance and associated FF loss, it is expected that the large area cells should present respectable FF and PCEs as their smaller area devices.

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