Poly(vinyl pyrrolidone)-modified metal oxide anode interlayers for stable organic solar cells

Nanostructured Metal-Organic Composite Solar Cells

This project was aimed at realizing a high efficiency organic photovoltaic (PV) device using nanoscale metallic features to enhance the overall cell performance. The goals of the project were threefold. The first aim was to develop transparent high-sheetconductivity nanopatterned metal films for use as transparent conductors that allow more light to enter a PV cell and enable parallel subcell c...

High-Permittivity Conjugated Polyelectrolyte Interlayers for High-Performance Bulk Heterojunction Organic Solar Cells.

Conjugated polyelectrolyte (CPE) interfacial layers present a powerful way to boost the I-V characteristics of organic photovoltaics. Nevertheless, clear guidelines with respect to the structure of high-performance interlayers are still lacking. In this work, impedance spectroscopy is applied to probe the dielectric permittivity of a series of polythiophene-based CPEs. The presence of ionic pen...

Study of Charge-collecting Interlayers for Single-junction and Tandem Organic Solar Cells

Increasing organic solar cell efficiency with polymer interlayers.

We demonstrate how organic solar cell efficiency can be increased by introducing a pure polymer interlayer between the PEDOT:PSS layer and the polymer:fullerene blend. We observe an increase in device efficiency with three different material systems over a number of devices. Using both electrical characterization and numerical modeling we show that the increase in efficiency is caused by optica...

Plasmonically sensitized metal-oxide electron extraction layers for organic solar cells

ZnO and TiOx are commonly used as electron extraction layers (EELs) in organic solar cells (OSCs). A general phenomenon of OSCs incorporating these metal-oxides is the requirement to illuminate the devices with UV light in order to improve device characteristics. This may cause severe problems if UV to VIS down-conversion is applied or if the UV spectral range (λ < 400 nm) is blocked to achieve...