Electrospun photonics topography for organic photovoltaics

Abstract

A Photonics device requires uniform periodic structural arrangement. Various techniques have been used to fabricate these types of structures, which employs several steps of fabrication. This work proposes single step hierarchical array of equal submicron size porous structure fabricated through tuning electrospinning processing parameters. The dictating parameters were high voltage, tip to collector distance and solvent used on the evolving structure. Morphological and optical investigations suggested the uniform periodic topography and enhancement in light absorption, which is assumed due to internal reflection of light. This structure was evaluated for better light harvesting as active layer in organic photovoltaic devices using poly (3 hexyl thiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blend, and further studying enhancement in photoelectrical characteristics.

Design and Fabrication of Photonic Structured Organic Solar Cells by Electrospraying

“…It has been observed that the effect of nanostructuring has definite and distinct levels of enhancements in the device performance. Patterning could be of spherical, pyramid, buckled, corrugated, and well-type structures. , Several fabrication methods have been reported for obtaining periodic patterns such as nanoimprinting lithography and template synthesis. , These are sophisticated lengthy processes and require multiple steps before the final pattern could be achieved. , While patterning the front electrode interface is relatively simpler, it does not always lead to optical enhancement in an organic photovoltaic architecture . Thus, patterning the back electrode interface is of interest.…”

“…Patterning could be of spherical, pyramid, buckled, corrugated, and well-type structures. 20,21 Several fabrication methods have been reported for obtaining periodic patterns such as nanoimprinting lithography and template synthesis. 22,23 These are sophisticated lengthy processes and require multiple steps before the final pattern could be achieved.…”