Proceedings of International Conference on Hybrid and Organic Photovoltaics 2015 (HOPV15)
Publication date: 5th February 2015
Recently, hybrid organic-inorganic perovskite solar cells (PSCs) have become a promising alternative sources for the future energy issues due to their rapid progress with power conversion efficiencies reaching to certified value of 20.1 % [1]. Different compositions of perovskite solar cells have been already developed with and without hole transporting materials (HTMs). In general, the HTM-free solar cell efficiency is lower compared to the HTM containing PSCs [2]. We have recently reported two new heteropentacene-based light absorbing HTMs showing power conversion efficiencies up to 10.5% in CH3NH3PbI3-based PSCs [2]. Here we present the synthesis, characterization and photovoltaic performance of a new series of new light absorbing HTMs. Dopent-free PSCs have been fabricated by sequential deposition of CH3NH3PbI3 perovskite and the newly synthesized HTMs, which allows us to reach a power conversion efficiencies of 11.4 %. The easy of synthesis, low cost and relatively high performance of newly synthesized HTMs offers good prospects for future applications.
[1] http://www.nrel.gov/ncpv/images/efficiency_chart.jpg [2] Qin P.; Kast H.; Nazeeruddin M. K.; Zakeeruddin S. M.; Mishra A.; Bäuerle P.; Grätzel M.. Low band gap S,N-heteroacene-based oligothiophenes as hole-transporting and light absorbing materials for efficient perovskite-based solar cells. Energy Environ. Sci. 2014, 7, 2981-2985.
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International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
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