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Use of silane-functionalized graphene oxide in organic photovoltaic cells and organic light-emitting diodes

Authors: Chang Yeong Lee, Quyet Van Le, Cheolmin Kim, Soo Young Kim
Publication date: 2015
Journal: Physical Chemistry Chemical Physics
Volume: 17
Issue: 14
Pages: 9369-9374
Publisher: Royal Society of Chemistry
Graphene oxide (GO) and silane-functionalized GO (sGO) sheets obtained through a simple sonication exfoliation method are employed as hole transport layers to improve the efficiency of organic photovoltaic (OPV) cells and organic light-emitting diodes (OLED). GO was functionalized using (3-glycidyl oxypropyl)trimethoxysilane (GPTMS) and triethoxymethylsilane (MTES). The appearance of new peaks in the Fourier-transform infrared spectra of the sGOs indicates the formation of Si–O–C, Si–O–Si, Si–H, and Si–O–C moieties, which provide evidence of the addition of silane to the GO surface. Furthermore, the appearance of Si–O–Si bonds in the synchrotron radiation photoelectron spectra (SRPES) of the MTES-sGO and GPTMS-sGO samples suggests that silane groups were effectively functionalized onto the GO sheets. An OPV cell with GO layers showed a lower performance with a power conversion …

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