Open-circuit voltage of organic solar cells: interfacial roughness makes the difference

Nanostructured hybrid solar cells: dependence of the open circuit voltage on the interfacial composition.

Inverted polymer solar cells [ 1 , 2 ] fabricated using transparent metal oxide cathodes have received signifi cant attention due to their potential for improved lifetime and performance compared to conventionally structured organic solar cells. [ 3 ] An additional attractive feature of this design is that low temperature, solution processed metal oxides can be employed allowing for compatibili...

Can morphology tailoring improve the open circuit voltage of organic solar cells?

Exploring the open-circuit voltage of organic solar cells under low temperature

Open-circuit voltage (VOC) in organic solar cells (OSCs) is currently still not well-understood. A generally acceptable view is that VOC is mainly determined by the energy level offset between donor and acceptor materials. Recently in ternary blend OSCs, VOC is found to be dependent on the blend composition. But contrary to expectation, this dependence is not a simple linear relationship, which...

Effect of illumination intensity and temperature on open circuit voltage in organic solar cells

The effect of illumination intensity and temperature on open circuit voltage Voc in organic photovoltaic devices has been investigated. Voc is observed to saturate at high illumination intensities. The illuminated J-V characteristics at different intensities intersect the dark characteristic at a single point. This intersection point is shown to be equal to the built-in voltage Vbi in the sampl...

Fullerene-free small molecule organic solar cells with a high open circuit voltage of 1.15 V.

A new small molecule named DTBTF with thiobarbituric acid as a terminal group was designed and synthesized as an acceptor for organic photovoltaic applications. DTBTF exhibits strong absorption in the visible region, and a relatively high lying LUMO energy level (-3.62 eV). All-small-molecule organic solar cells based on DR3TSBDT:DTBTF blend films show a considerable PCE of 3.84% with a high V(...