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Issue 7, 2017
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Artificial light-harvesting n-type porphyrin for panchromatic organic photovoltaic devices

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Abstract

A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI–PZn–PDI, was designed by connecting a zinc porphyrin (PZn) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV was achieved through the extended π-conjugation and intramolecular charge transfer between the strongly electron-donating PZn core and the electron-accepting PDI wings. A bulk heterojunction (BHJ) structured photovoltaic device fabricated from PDI–PZn–PDI with PTB7-Th exhibited panchromatic photon-to-current conversion from 350 to 900 nm. A power conversion efficiency of 5.25% with a remarkably low Eloss of 0.54 eV was achieved by optimizing the nanomorphology of the BHJ films by adding pyridine and by controlling the ZnO/BHJ interfacial properties.

Graphical abstract: Artificial light-harvesting n-type porphyrin for panchromatic organic photovoltaic devices

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Publication details

The article was received on 21 Mar 2017, accepted on 11 May 2017 and first published on 16 May 2017


Article type: Edge Article
DOI: 10.1039/C7SC01275F
Citation: Chem. Sci., 2017,8, 5095-5100
  • Open access: Creative Commons BY license
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    Artificial light-harvesting n-type porphyrin for panchromatic organic photovoltaic devices

    W. T. Hadmojo, D. Yim, H. Aqoma, D. Y. Ryu, T. J. Shin, H. W. Kim, E. Hwang, W. Jang, I. H. Jung and S. Jang, Chem. Sci., 2017, 8, 5095
    DOI: 10.1039/C7SC01275F

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