Semitransparent Organics Solar Cells

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GRØN DYST 2014 Technical University of Denmark

Semitransparent Organics Solar Cells
Paper
Author:C. Boscheri (TU/e Sustainable Energy Technology, Eindhoven University of Technology, The Netherlands)
Date: 2014-06-27     Track: Main     Session: 1

70% of world population is expected to live in cities by 2050 and in order to address world increasing energy consumption new solutions and effective strategies must be found. The concept of smart cities serves as foundation to turn cities of today into the sustainable cities of the future. Nowadays most of energy consumed in cities is produced outside urban areas and, even if environmental and security of supplies concerns have increased, it is hard to implement decentralized renewable energy systems in such context. One very important reason is the physical lack of space. The implementation of silicon photovoltaic is inspiringly contributing to increase the share of renewable energy, year by year. Nonetheless, silicon solar cells are bulky and opaque, and therefore particularly suited only for roof installation and not for other challenging building integrated solutions, like building windows. Organic solar cells are a thin film technology that uses photoactive layers with thicknesses in the range of 100 nm. This allows the active layer to be intrinsically semitransparent. This type of solar cells normally look opaque to the human eye because a metallic top contact is present, which efficiently collects the generated current. In a semitransparent device the top opaque electrode is substituted with a suitable transparent contact. Semi transparent organic solar cells have the potential for interesting applications, such as integration into windows for buildings, cars and screens of electronic devices. The project was aimed to fabricate and characterize efficient semitransparent organic solar cells.