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Issue 18, 2018
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Designing a ternary photovoltaic cell for indoor light harvesting with a power conversion efficiency exceeding 20%

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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.

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

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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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