Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV18)
DOI: https://doi.org/10.29363/nanoge.hopv.2018.096
Publication date: 21st February 2018
Recently, the emerging non-fullerene electron acceptor has replacing the leading role of fullerene derivatives in the field of organic solar cells (OSCs). In our work, via modulation of the intermolecular charge transfer (ICT) effect, we designed and synthesized a serial of novel small molecule acceptors, which showed very good photovoltaic performance in the OSCs. First, we weakened the ICT effect of the famous acceptor ITIC via replacing its benzene-based terminal group with its thiophene-based counterpart to synthesize the ITCC and ITCC-m, which have up-shifted the lowest unoccupied molecular orbit (LUMO) levels and large bandgaps. The OSCs based on ITCC showed increased output voltages. Then we enhanced the ICT effect of IEIC and prepared the narrowed bandgap acceptors IEICO and IEICO-4F, which demonstrated very high short-circuit current densities in the devices at low voltages losses. The designed acceptor have very good applications in the single-junction, tandem, ternary and semi-transparent OSCs. Recently, the emerging non-fullerene electron acceptor has replacing the leading role of fullerene derivatives in the field of organic solar cells (OSCs). In our work, via modulation of the intermolecular charge transfer (ICT) effect, we designed and synthesized a serial of novel small molecule acceptors, which showed very good photovoltaic performance in the OSCs. First, we weakened the ICT effect of the famous acceptor ITIC via replacing its benzene-based terminal group with its thiophene-based counterpart to synthesize the ITCC and ITCC-m, which have up-shifted the lowest unoccupied molecular orbit (LUMO) levels and large bandgaps. The OSCs based on ITCC showed increased output voltages. Then we enhanced the ICT effect of IEIC and prepared the narrowed bandgap acceptors IEICO and IEICO-4F, which demonstrated very high short-circuit current densities in the devices at low voltages losses. The designed acceptor have very good applications in the single-junction, tandem, ternary and semi-transparent OSCs.
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International Conference on Hybrid and Organic Photovoltaics
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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