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Artificial Light-Harvesting n-type Porphyrin for Panchromatic Organic Photovoltaic Devices

Abstract

A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPV) is developed. The n-type acceptor, PDI-PZn-PDI, is designed by connecting a zinc porphyrin (PZn) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV is achieved through the extended -conjugation and intramolecular charge transfer between the strong 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 BHJ films by adding pyridine and by controlling the ZnO/BHJ interfacial properties.

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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, Accepted Manuscript
  • 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, E. Hwang, W. Jang, I. H. Jung and S. Jang, Chem. Sci., 2017, Accepted Manuscript , DOI: 10.1039/C7SC01275F

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