Conjugated polymers and oligomers have received a lot of attention as active materials for organic photovoltaic devices because of their potential for the development of plastic solar cells that are lightweight, flexible, and low cost. Bulk heterojunctions fabricated by blending polymers with fullerene derivative have resulted in great improvements in the polymer photovoltaic cell efficiencies. However, to produce highly efficient organic photovoltaic devices, it is necessary to extend the light absorption into the near-infrared region and at the same time preserve the high IPCE and open-circuit voltage. Several papers have been recently dedicated to the investigation of the use of conjugated polymers incorporating heavy atoms; in particular Pt acetylide polymers as donors in solar cells using PCBM as acceptor 1 were proposed as a tool to enhance charge photogeneration. For instance, Mei et al. reported on a Pt acetylide-based polymer using a 2,1,3-benzothiadiazole (BTD) acceptor moiety flanked on either side by 2,5-thienyl (Th) donor units ([-Pt(L2)-t-Th-BTD-Th-t-]n, where L = PBu3), which absorbs strongly throughout the visible region 2. Recently we found that the use of Ru acetylides is a novel interesting tool for the design of donor materials 3 to combine with electron-withdrawing fullerides in bulk heterojunction solar cells. New dinuclear Ru(II) complexes where two Ru atoms are separated by a bridge consisting of a 2,1,3 benzothiadiazole acceptor moiety flanked on either side by 2,5-thienyl or 3-hexyl substituted 2,5-thienyl donor units were synthesized, along with related Pt(II) complexes (Figure). Here we present their behavior as photoactive donors when blended with a fullerene as acceptor, in bulk heterojunction solar cells. References. (1) W.-Y. Wong, C.-L. Ho, Acc. Chem. Res. 2010, 43, 1246. (2) J. Mei, et al. Appl. Mater. Interfaces 1 2009, 150. (3) A. Colombo, C. Dragonetti, D. Roberto, R. Ugo, L. Falciola, S. Luzzati, and D. Kotowski Organometallics 2011, 30, 1279.
NEW METAL ACETYLIDE DONOR COMPLEXES FOR BULK-HETEROJUNCTION SOLAR CELLS
2012
Abstract
Conjugated polymers and oligomers have received a lot of attention as active materials for organic photovoltaic devices because of their potential for the development of plastic solar cells that are lightweight, flexible, and low cost. Bulk heterojunctions fabricated by blending polymers with fullerene derivative have resulted in great improvements in the polymer photovoltaic cell efficiencies. However, to produce highly efficient organic photovoltaic devices, it is necessary to extend the light absorption into the near-infrared region and at the same time preserve the high IPCE and open-circuit voltage. Several papers have been recently dedicated to the investigation of the use of conjugated polymers incorporating heavy atoms; in particular Pt acetylide polymers as donors in solar cells using PCBM as acceptor 1 were proposed as a tool to enhance charge photogeneration. For instance, Mei et al. reported on a Pt acetylide-based polymer using a 2,1,3-benzothiadiazole (BTD) acceptor moiety flanked on either side by 2,5-thienyl (Th) donor units ([-Pt(L2)-t-Th-BTD-Th-t-]n, where L = PBu3), which absorbs strongly throughout the visible region 2. Recently we found that the use of Ru acetylides is a novel interesting tool for the design of donor materials 3 to combine with electron-withdrawing fullerides in bulk heterojunction solar cells. New dinuclear Ru(II) complexes where two Ru atoms are separated by a bridge consisting of a 2,1,3 benzothiadiazole acceptor moiety flanked on either side by 2,5-thienyl or 3-hexyl substituted 2,5-thienyl donor units were synthesized, along with related Pt(II) complexes (Figure). Here we present their behavior as photoactive donors when blended with a fullerene as acceptor, in bulk heterojunction solar cells. References. (1) W.-Y. Wong, C.-L. Ho, Acc. Chem. Res. 2010, 43, 1246. (2) J. Mei, et al. Appl. Mater. Interfaces 1 2009, 150. (3) A. Colombo, C. Dragonetti, D. Roberto, R. Ugo, L. Falciola, S. Luzzati, and D. Kotowski Organometallics 2011, 30, 1279.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
