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

Wisnu Tantyo Hadmojo, Dajeong Yim, Havid Aqoma, Du Yeol Ryu, Tae Joo Shin, Hyun Woo Kim, Eojin Hwang, Woo Dong Jang*, In Hwan Jung, Sung Yeon Jang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

51 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)5095-5100
Number of pages6
JournalChemical Science
Volume8
Issue number7
DOIs
StatePublished - 2017

ASJC Scopus subject areas

  • Chemistry(all)

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