Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

Hang Yin; Johnny Ka Wai Ho; Sin Hang Cheung; Roger Jie Yan; Ka Lok Chiu; Xiaotao Hao; Shu Kong So

doi:10.1039/C8TA01728J

Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

Hang Yin,^a Johnny Ka Wai Ho,^a Sin Hang Cheung,^a Roger Jie Yan,^a Ka Lok Chiu,^a Xiaotao Hao^b and Shu Kong So*^a

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* Corresponding authors

^a Department of Physics and Institute of Advanced Materials, Hong Kong Baptist University, Kowloon Tong, P. R. China
E-mail: skso@hkbu.edu.hk

^b School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan, P. R. China

Abstract

We used several polymers as the ternary components to demonstrate a ternary strategy to improve the performance of PCDTBT:PC₇₁BM devices under 1 sun and indoor illumination. With a binary bulk-heterojunction (BHJ) of PCDTBT:PC₇₁BM organic photovoltaic (OPV) cell, a power conversion efficiency (PCE) of 16.5% under indoor light sources (300 lux from fluorescence tube) was achieved. However, with a ternary BHJ cell of PCDTBT:PDTSTPD:PC₇₁BM, the PCE can be enhanced to 20.8%. FFs are the primarily improved in these devices. Transport and absorption measurements indicate the origins of the improvements of OPV performance: the ternary BHJ films exhibit enhanced hole mobilities and reduced Urbach energies, indicating that the blending of the PDTSTPD component passivates shallow traps near the band edges of the BHJ films.

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Publication details

The article was received on 21 Feb 2018, accepted on 06 Apr 2018 and first published on 10 Apr 2018

Article type: Paper

DOI: 10.1039/C8TA01728J

Citation: J. Mater. Chem. A, 2018,6, 8579-8585

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Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

H. Yin, J. K. W. Ho, S. H. Cheung, R. J. Yan, K. L. Chiu, X. Hao and S. K. So, J. Mater. Chem. A, 2018, 6, 8579
DOI: 10.1039/C8TA01728J
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Journal of Materials Chemistry A

Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

Abstract

Supplementary files

Publication details

Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

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