Berlin 2012 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 72: Poster Session: Si-based Photovoltaics / Inorganic Photovoltaics / Structure and Transport in Organic Photovoltaics / Organic Semiconductors
HL 72.18: Poster
Mittwoch, 28. März 2012, 16:00–19:00, Poster D
Characterization of hybrid solar cells based on conjugated polymers and CuInS2 nanoparticles with different organic ligands — •Rany Miranti, Nikolay Radychev, Marta Kruszynska, Dorothea Scheunemann, Joanna Kolny-Olesiak, Holger Borchert, and Jürgen Parisi — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, Carl-von-Ossietzky-Str, 9-11, 26129 Oldenburg, Germany
The performance of hybrid solar cells demonstrated considerable advances in recent years, especially concerning hybrid blends containing semiconductor nanocrystals of CdS, ZnO, or CdSe. However, materials based on cadmium chalcogenides are highly toxic which severely restricts possible applications. Moreover these materials demonstrate a relatively low absorption coefficient and the band gap of these intensively used semiconductor nanocrystals does not match the solar spectrum well. One of the promising alternative materials is the direct band gap semiconductor CuInS2 (CIS). CIS absorbs up to 820 nm (Eg=1.5eV), is less toxic, and has a high absorption coefficient of about 5×105 cm−1 (at 500 nm). In the present work, CIS nanoparticles with different shapes were blended with two different kinds of conjugated polymers, namely P3HT and poly[2,1,3-benzothiadiazole-4,7-diyl[4,4-bis(2-ethylhexyl)-4H-cyclopenta[2,1-b:3,4-b’]dithiophene-2,6-diyl]] (PCPDTBT). Corresponding solar cells were prepared and studied by current-voltage profiling and measurements of the external quantum efficiency. Furthermore, the influence of various organic capping ligands on the CIS-based hybrid solar cells was investigated.