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Issue 35, 2018
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Semi-transparent polymer solar cells with optical adjusting layers

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Efficiency and transparency are the most essential issues for semi-transparent polymer solar cells (ST-PSCs), and must be compatible to facilitate and advance commercial applications such as photovoltaic integration in windows, roofs and other aesthetic buildings. Herein, an optical adjusting layer (OAL) is intentionally introduced to poly(3-hexylthiophene) (P3HT): indene-C60 bisadduct (ICBA)-based ST-PSCs to effectively enhance light absorption by adjusting the incident light phase. The shoulder field of the incident photon-to-electron conversion efficiency (IPCE) spectra was greatly broadened, especially at long wavelengths, resulting in a 22.6% improvement in power conversion efficiency (PCE) while maintaining a 26.1% average visible transmittance (AVT). Furthermore, transfer matrix modeling (TMM) was used to analyze the function of the OAL by calculating the optical field distribution and absorption in the device. The reflection phase shift induced optical field redistribution results in dramatically enhanced absorption in the active layer, which agrees well with experimental results. We believe these findings offer a promising path to develop high-performance ST-PSCs with practical applications.

Graphical abstract: Semi-transparent polymer solar cells with optical adjusting layers

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Publication details

The article was received on 05 Jul 2018, accepted on 09 Aug 2018 and first published on 11 Aug 2018

Article type: Paper
DOI: 10.1039/C8TC03289K
Citation: J. Mater. Chem. C, 2018,6, 9494-9500

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    Semi-transparent polymer solar cells with optical adjusting layers

    P. Shen, Y. Long, G. Wang, Y. Wang, W. Guo and L. Shen, J. Mater. Chem. C, 2018, 6, 9494
    DOI: 10.1039/C8TC03289K

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