Jump to main content
Jump to site search


Oleylamine-functionalized graphene oxide as an electron block layer towards high-performance and photostable fullerene-free polymer solar cells

Author affiliations

Abstract

Oleylamine-functionalized graphene oxide (GO) has a shallower energy level of conduction band (ECB) and a deeper energy level of the valence band (EVB) as compared to common hole extraction layer (HEL) materials, which make the electron block layer (EBL). Photoluminescence, X-ray photoelectron spectroscopy (XPS), and current density–voltage (JV) curves with a large reverse bias voltage range obtained under dark conditions are used to determine whether GO layers play important roles in blocking the electron transport to the MoO3/Ag composite anode and prevent MoO3 diffusion into a photoactive layer under light illumination. Moreover, GO inserted between a photoactive layer and an HEL enhances charge carrier transport and collection and avoids the monomolecular recombination between the photoactive layer and HEL. Photovoltaic parameters and photostability measurements of inverted and forward PSCs have shown that upon introduction of GO, the performance and photostability of PSCs are improved. On adding GO to PSCs, the power conversion efficiency (PCE) increases approximately 5% and 4% and reduces the decay ratio to approximately 50% and 65% of the initial value for the inverted and forward PSCs, respectively.

Graphical abstract: Oleylamine-functionalized graphene oxide as an electron block layer towards high-performance and photostable fullerene-free polymer solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 11 Aug 2017, accepted on 03 Oct 2017 and first published on 04 Oct 2017


Article type: Paper
DOI: 10.1039/C7NR05939F
Citation: Nanoscale, 2017, Advance Article
  •   Request permissions

    Oleylamine-functionalized graphene oxide as an electron block layer towards high-performance and photostable fullerene-free polymer solar cells

    Z. Liu, S. Niu and N. Wang, Nanoscale, 2017, Advance Article , DOI: 10.1039/C7NR05939F

Search articles by author

Spotlight

Advertisements