Thiophene-free diphenyl-amino-stilbene-diketo-pyrrolo-pyrrole derivatives as donors for organic bulk heterojunction solar cell

0478908 - FZÚ 2018 RIV SK eng J - Journal Article
Honová, J. - Luňák, S. - Vala, M. - Stříteský, S. - Fekete, Ladislav - Weiter, M. - Kovalenko, A.
Thiophene-free diphenyl-amino-stilbene-diketo-pyrrolo-pyrrole derivatives as donors for organic bulk heterojunction solar cell.
Chemical Papers. Roč. 70, č. 10 (2016), s. 1416-1424. ISSN 0366-6352
R&D Projects: GA MŠMT LO1409; GA ČR(CZ) GA15-05095S; GA MŠMT LM2015088
Institutional support: RVO:68378271
Keywords : organic solar cell * thiophene-free * diphenyl-amino-stilbene * hole mobility * molecular structure
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 1.258, year: 2016

An extended study on a group of four soluble diphenyl-amino-stilbene based diphenyl-diketopyrrolo- pyrrole molecules has been carried out. Using the materials in thin-film transistors it was shown that the above-mentioned compounds can be successfully used as donors in organic photovoltaic devices. Influence of the molecular symmetry and solubilizing chain on the morphology and solar cell performance are described. It was shown that a shorter and non-branched ethyl acetate chain leads to higher charge carrier mobility, short circuit current, and better fill factor. After the basic optimization, a power conversion efficiency of about 1.5 % was reached. This, to the best of our knowledge, is the highest reported efficiency of thiophene-free small-molecule diketo-pyrrolopyrroles.

Permanent Link: http://hdl.handle.net/11104/0275023