Enhancement of the efficiency and stability of organic photovoltaic devices via the addition of a lithium-neutralized graphene oxide electron-transporting layer. Kakavelakis, G., Konios, D., Stratakis, E., & Kymakis, E. Chemistry of Materials, 2014.
abstract   bibtex   
© 2014 American Chemical Society. Lithium-neutralized graphene oxide (GO-Li) was spin coated between the photoactive layer and the metal oxide electron-transporting layer (ETL) as an additional interlayer in organic photovoltaic devices. The introduction of GO-Li leads to a superior interface between the ETL and the photoactive layer. Combined with the reduced work function (WF) of GO-Li (4.3 eV), which is a perfect match with the fullerene acceptor material LUMO level, PCDTBT:PC71BM-based air-processed devices with a GO-Li layer exhibited a significant enhancement in their power conversion efficiency (PCE) from 5.51 to 6.29% (14.2% increase over that of comparable devices without the graphene-based interfacial layer). Furthermore, the GO-Li device exhibited stability higher than that of the device without the interlayer due to the fact that the GO-Li acts as an internal shield against humidity, protecting the air sensitive polymers and improving the lifetime of the devices.
@article{
 title = {Enhancement of the efficiency and stability of organic photovoltaic devices via the addition of a lithium-neutralized graphene oxide electron-transporting layer},
 type = {article},
 year = {2014},
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 volume = {26},
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 created = {2020-09-22T06:58:34.541Z},
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 abstract = {© 2014 American Chemical Society. Lithium-neutralized graphene oxide (GO-Li) was spin coated between the photoactive layer and the metal oxide electron-transporting layer (ETL) as an additional interlayer in organic photovoltaic devices. The introduction of GO-Li leads to a superior interface between the ETL and the photoactive layer. Combined with the reduced work function (WF) of GO-Li (4.3 eV), which is a perfect match with the fullerene acceptor material LUMO level, PCDTBT:PC71BM-based air-processed devices with a GO-Li layer exhibited a significant enhancement in their power conversion efficiency (PCE) from 5.51 to 6.29% (14.2% increase over that of comparable devices without the graphene-based interfacial layer). Furthermore, the GO-Li device exhibited stability higher than that of the device without the interlayer due to the fact that the GO-Li acts as an internal shield against humidity, protecting the air sensitive polymers and improving the lifetime of the devices.},
 bibtype = {article},
 author = {Kakavelakis, G. and Konios, D. and Stratakis, E. and Kymakis, E.},
 journal = {Chemistry of Materials},
 number = {20}
}

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