Overview
Project 01
Project 02
Project 04
Project 06
Project 07
Project 08
Project 10
Project 11
Project 12
Project 13
Project 14

Project 10 – Organic Solar Cells based on Highly Ordered Organic Nanostructures

Helmut Sitter, ao.Univ.Prof.Mag.DI.Dr.

The aim of this project is to explore the advantages of well ordered nanostructures of organic molecules for the application of solar cells. Prerequisite of further improvements of both, the fundamental understanding as well as the achieved solar efficiencies is on the one side a better control of the growth conditions on a nanometer scale as well as means of characterizing the achieved structures. Here nearly all other groups of the consortium will contribute. Our own contribution will be on the preparation side by a simple HV evaporation system as well as with a UHV evaporation system with an UHV sample transfer unit. On the characterization side we concentrate on STM and photocurrent-STM investigations.

However, the main emphasis will be on the optical and photocurrent investigation of structures within working solar cells. Here both types of solar cells, Schottky-junction types of cells (based on organic films on metals and degenerate semiconductors) as well as p/n-heterostructures on semiconducting substrates should be tested. The organic materials we concentrate on are thiophenes and phthalocyanines as p- and perylene derivatives as n-type contacts deposited in the first phase directly on the substrate material, in a second phase on functionalized surfaces.