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

Physical Chemistry Chemical Physics : PCCP
Chang Yeong LeeSoo Young Kim

Abstract

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 efficiency (PCE) of 2.06%; in contrast, OPV cells based on GPTMS-sGO and MTES-sGO have PCE values of 3.00 and 3.08%, respectively. The OLED devices based on GPTMS-sGO and MTES-sGO showed a higher maximum luminance efficiency of 13.91 and 12.77 cd A(-1), respectively, than PEDOT:PSS-based devices (12.34 cd A(-1)). The SRPES results revealed that the work f...Continue Reading

References

Feb 1, 2008·Physical Review Letters·S V MorozovA K Geim
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Apr 8, 2009·Nature Nanotechnology·Sungjin Park, Rodney S Ruoff
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Jan 4, 2012·Advanced Materials·Mikkel JørgensenFrederik C Krebs
Jul 19, 2013·Journal of Nanoscience and Nanotechnology·Kyoung Soon ChoiSoo Young Kim
May 29, 2014·Physical Chemistry Chemical Physics : PCCP·Quyet Van LeSoo Young Kim
Oct 25, 2014·Physical Chemistry Chemical Physics : PCCP·Quyet Van LeSoo Young Kim

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Citations

Aug 21, 2018·Nanoscale·Syeda S AbbasTony McNally
Feb 21, 2019·Advanced Materials·Jia SunJeong Ho Cho
Sep 16, 2020·Polymers·Do Yeon HeoSoo Young Kim
Apr 21, 2021·Colloids and Surfaces. B, Biointerfaces·Tais Monteiro MagneRalph Santos-Oliveira
Nov 30, 2018·Dental Materials : Official Publication of the Academy of Dental Materials·Putsadeeporn ThammajarukMassimiliano Guazzato
Sep 11, 2020·ACS Applied Materials & Interfaces·Edgar Homero Ramirez-SoriaJosé Bonilla-Cruz

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