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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,  Jie Roger Yan,  Ka Lok Chiu,  Xiaotao Hao  and  Shu-Kong So 

Abstract

We use several polymers as the ternary component to demonstrate a ternary strategy to improve the performance of PCDTBT:PC71BM devices under 1-Sun and indoor illuminances. 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). However, with a ternary BHJ cell of PCDTBT:PDTSTPD:PC71BM, the PCE can be enhanced to 20.8%. FFs are the main improvements. 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 edge 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, Accepted Manuscript
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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, J. R. Yan, K. L. Chiu, X. Hao and S. So, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA01728J

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