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H xMoO 3-Y Nanobelts: An Excellent Alternative to Carbon Electrode for High Performance Mesoscopic Perovskite Solar Cells

40 Pages Posted: 24 Sep 2018 Sneak Peek Status: Review Complete

See all articles by Hua Zhang

Hua Zhang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Huan Wang

Chinese Academy of Sciences (CAS) - Shenzhen Key Laboratory of Nanobiomechanics

Yinglong Yang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Chen Hu

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Yang Bai

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Teng Zhang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Wei Chen

Huazhong University of Science and Technology (Formerly Tongi Medical University) - Wuhan National Laboratory for Optoelectronics

Shihe Yang

Peking University - Guangdong Key Lab of Nano-Micro Material Research

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Abstract

The forming Schottky barrier between carbon and perovskite has currently been the bottlenecks to improve the performance of carbon-based hole-conductor-free perovskite solar cells (C-PSCs). A conventional approach to resolving this issue is incorporating a hole-transport material (HTM) in the mesoscopic skeleton or chemical modification of the carbon electrode. Here, we show an innovative strategy that using solution-processed hydrogen molybdenum bronzes (HxMoO3-y) nanobelts, an n-type HTM with high work function and electrical conductivity, as the sole electrode material to enhance the hole-extraction process and result in efficient PSCs for the first time. The mesoscopic cell configuration of FTO/c-TiO2/m-TiO2/m-Al2O3/HxMoO3-y with perovskite infiltration delivered a champion power conversion efficiency (PCE) of 14.5%, which compares favorably with that of 13.3% for the typical high temperature C-PSCs. The increase in cell efficiency stems primarily from the enhancement in open circuit voltage and short circuit current, which is owed to the HxMoO3-y electrode with more favorable energy alignment and higher hole-extraction ability than carbon electrode. These results open up the potential of HxMoO3-y nanobelts as an efficient electrode for realizing high-performance and low-cost mesoscopic PSCs.

Suggested Citation

Zhang, Hua and Wang, Huan and Yang, Yinglong and Hu, Chen and Bai, Yang and Zhang, Teng and Chen, Wei and Yang, Shihe, H xMoO 3-Y Nanobelts: An Excellent Alternative to Carbon Electrode for High Performance Mesoscopic Perovskite Solar Cells (September 22, 2018). Available at SSRN: https://ssrn.com/abstract=3253574 or http://dx.doi.org/10.2139/ssrn.3253574
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Hua Zhang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Room 6515, 6/F, Lifts 25/26
Clear Water Bay
Kowloon
Hong Kong

Huan Wang

Chinese Academy of Sciences (CAS) - Shenzhen Key Laboratory of Nanobiomechanics

1068 Xueyuan Avenue
Shenzhen University Town
Shenzhen
China

Yinglong Yang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Room 6515, 6/F, Lifts 25/26
Clear Water Bay
Kowloon
Hong Kong

Chen Hu

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Room 6515, 6/F, Lifts 25/26
Clear Water Bay
Kowloon
Hong Kong

Yang Bai

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Room 6515, 6/F, Lifts 25/26
Clear Water Bay
Kowloon
Hong Kong

Teng Zhang

Hong Kong University of Science & Technology (HKUST) - Department of Chemistry

Room 6515, 6/F, Lifts 25/26
Clear Water Bay
Kowloon
Hong Kong

Wei Chen

Huazhong University of Science and Technology (Formerly Tongi Medical University) - Wuhan National Laboratory for Optoelectronics

1037 Luoyu Rd
Wuhan, 430074
China

Shihe Yang (Contact Author)

Peking University - Guangdong Key Lab of Nano-Micro Material Research ( email )

No. 38 Xueyuan Road
Haidian District
Beijing, Beijing 100871
China

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