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

Research output: Contribution to journalArticle

16 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

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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  • 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