Fullerene based electron transporting layers for large area polymer solar cells

ABSTRACT

An efficient fullerene based electron transporting material, C₆₀,N,N,N -trimethyl-1-(2,3,4-tris(2-(2-methoxyethoxy)ethoxy)phenyl)dimetha-naminium monoadduct iodide salt (LT-S9079), is introduced to large area flexible polymer solar cells (PSCs). The excellent conductivity and wettability of the LT-S9079 on the active layer enable the fabrication of large-area slot-die coated PSCs of conventional photovoltaic device structure. The PSCs incorporating LT-S9079 demonstrate high current densities of 8.14 mA cm⁻² and power conversion efficiencies of 1.46%.

KEYWORDS:

• Electron transporting layers
• fullerene
• large area solar cells
• polymer solar cells

Funding

This work was supported by the Soonchunhyang University Research Fund.