High-Performance Near-Infrared Absorbing n-Type Porphyrin Acceptor for Organic Solar Cells

Wisnu Tantyo Hadmojo, Un Hak Lee, Dajeong Yim, Hyun Woo Kim, Woo Dong Jang, Sung Cheol Yoon, In Hwan Jung, Sung Yeon Jang

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8 Citations (Scopus)

Abstract

While the outstanding charge transport and sunlight-harvesting properties of porphyrin molecules are highly attractive as active materials for organic photovoltaic (OPV) devices, the development of n-type porphyrin-based electron acceptors has been challenging. In this work, we developed a high-performance porphyrin-based electron acceptor for OPVs by substitution of four naphthalene diimide (NDI) units at the perimeter of a Zn-porphyrin (P Zn ) core using ethyne linkage. Effective π-conjugation between four NDI wings and the P Zn core significantly broadened Q-band absorption to the near infrared region, thereby achieving the narrow band gap of 1.33 eV. Employing a windmill-structured tetra-NDI substituted P Zn -based acceptor (P Zn -TNDI) and mid-band gap polymer donor (PTB7-Th), the bulk heterojunction OPV devices achieved a power conversion efficiency (PCE) of 8.15% with an energy loss of 0.61 eV. The PCE of our P Zn -TNDI-based device was the highest among the reported OPVs using porphyrin-based acceptors. Notably, the amorphous characteristic of P Zn -TNDI enabled optimization of the device performance without using any additive, which should make industrial fabrication simpler and cheaper.

Original languageEnglish
Pages (from-to)41344-41349
Number of pages6
JournalACS Applied Materials and Interfaces
Volume10
Issue number48
DOIs
Publication statusPublished - 2018 Dec 5

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All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Hadmojo, W. T., Lee, U. H., Yim, D., Kim, H. W., Jang, W. D., Yoon, S. C., Jung, I. H., & Jang, S. Y. (2018). High-Performance Near-Infrared Absorbing n-Type Porphyrin Acceptor for Organic Solar Cells. ACS Applied Materials and Interfaces, 10(48), 41344-41349. https://doi.org/10.1021/acsami.8b14577