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Researchers at Kaunas University of Technology (KTU) Organic Chemistry laboratories have developed material which offers much cheaper alternative to the one which is currently being used in hybrid solar cells. The efficiency of the semi-conductors created by the team of KTU’s chemists was confirmed at Swiss Federal Institute of Technology Lausanne. The publication on the discovery has been selected among 5 percent most important papers in Angewandte Chemie International Edition, which is one of the prime chemistry journals in the world.
“The material created by us is considerably cheaper and the process of its synthesis is less complicated than that of the currently used analogue material. Also, both materials have very similar efficiency of converting solar energy into electricity. That means that our semiconductors have similar characteristics to the known alternatives, but are much cheaper”, says professor Vytautas Getautis, head of the chemistry research group responsible for the discovery.
The solar cells containing organic semiconductors created at KTU were constructed and tested by physicists at Lausanne. The tests revealed outstanding results: the effectivity of the cells’ converting solar energy into electricity was 16.9 percent. There are only a few organic semiconductors in the world affording such a high solar cell efficiency.
Prof Getautis says that the material created at KTU will be used in the construction of future solar cells: almost all solar cells are made from inorganic semiconductors. Hybrid, semi-organic solar cells are still being developed and perfected at the research centres all over the world.
KTU and Swiss Federal Institute of Technology Lausanne registered the invention at the European Patent Office.
The publication featuring the results of the research of the international team received an exceptional acclaim from the publishers of Angewandte Chemie International Edition, which is one of the prime chemistry journals in the world (IF 11.261). The paper written by researchers from Kaunas and Lausanne was rated as VIP (Very Important Paper).
“Our paper is among the 5 percent of most important publications in one of the most influential chemistry journals followed by all undertaking research in the field of chemistry. This is great achievement for scientists from Lithuanian research institutions. In the future, the patent, which is registered together with the partners, will hopefully bring financial gain for the university”, says KTU senior chemistry researcher professor Getautis.
The research leading to the invention was a part of the MESO project of the European Union Seventh Framework Programme (EP7), Grant Agreement Number 604032.
Methoxydiphenylamine-Substituted Carbazole Twin Derivative: An Efficient Hole-Transporting Material for Perovskite Solar Cells, Angewandte Chemie International Edition
Paul Gratia, Artiom Magomedov, Dr. Tadas Malinauskas, Dr. Maryte Daskeviciene, Dr. Antonio Abate, Dr. Shahzada Ahmad, Prof. Dr. Michael Grätzel, Prof. Vytautas Getautis and Prof. Dr. Mohammad Khaja Nazeeruddin
Article first published online : 16 JUL 2015, DOI: 10.1002/anie.201504666