Category: Organic Photovoltaics

Module Designs

For the production and upscaling of practical solar cells on large areas, mod­ules have to be constructed from individual cells. The relatively high sheet resistance of the Sn02:F coating (usually about 10 Q/П), used as the current collector, limits the width of individual cells to less than 1 cm. One way to avoid Ohmic losses […]

7.1 Operating Principles and Cell Structure of the nc-DSC

A schematic representation of the construction and operating principles of the nc-DSC is shown in Fig. 7.1. In the basic version, the device consists of two glass substrates coated with a transparent conducting oxide (TCO) such as SnC>2:F, with high optical transmission and low resistance. vernier electrode glass ——————– ►p.———- , TCO ®Ч_ I. i^Wht […]

Dye-Sensitized Solar Cells

Jan Kroon and Andreas Hinsch Ever since the invention of the silicon solar cell in the 1940s, people have acknowledged the enormous potential of photovoltaic systems for large scale electricity production. However, semiconductor grade silicon wafers are ex­pensive so great effort has been put into developing cheaper thin-film solar cells and modules. Such films may […]

Nanostructure in Polymer/Molecule and Polymer/Polymer Blends

Photovoltaic devices constructed with a photoactive layer from a blend of materials with suitable electroaffinity values may give a very effective dis­sociation of excitons at interfaces distributed inside the bulk of the layer. Charges are then transported to the electrodes using the respective mate­rial phase (donor/acceptor) driven by the electric field. A common result for […]

Internal and External Quantum Efficiencies of Organic Photodiodes

The spectral response, or action spectrum, of a phototodiode is obtained by measuring the electrical response of the device upon monochromatic illumi­nation over a wide range of wavelengths. The external quantum efficiency tj, often also called the incident photon-to-current efficiency (IPCE) of the device, is the ratio of the measured photocurrent (in electrons per unit […]