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

A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI-P -PDI, was designed by connecting a zinc porphyrin (P ) core to two perylenediimide (PDI) wings through ethyne bridges. A narrow bandgap of 1.27 eV was achieved throug...

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Bibliographic Details
Published in:Chemical science (Cambridge) 2017-07, Vol.8 (7), p.5095-5100
Main Authors: Hadmojo, Wisnu Tantyo, Yim, Dajeong, Aqoma, Havid, Ryu, Du Yeol, Shin, Tae Joo, Kim, Hyun Woo, Hwang, Eojin, Jang, Woo-Dong, Jung, In Hwan, Jang, Sung-Yeon
Format: Article
Language:English
Subjects:
Conversion
Energy conversion efficiency
Interfacial properties
Optimization
Photonic band gaps
Photovoltaic cells
Porphyrins
Solar cells
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Summary:A near-infrared-harvesting n-type porphyrin-based acceptor for organic photovoltaics (OPVs) was developed. The n-type acceptor, PDI-P -PDI, was designed by connecting a zinc porphyrin (P ) 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 P core and the electron-accepting PDI wings. A bulk heterojunction (BHJ) structured photovoltaic device fabricated from PDI-P -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 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.
ISSN:2041-6520
2041-6539
DOI:10.1039/c7sc01275f