標題: Novel metallo-dendrimers containing various Ru core ligands and dendritic thiophene arms for photovoltaic applications
作者: Satapathy, Rudrakanta
Ramesh, Mohan
Padhy, Harihara
Chiang, I. -Hung
Chu, Chih-Wei
Wei, Kung-Hwa
Lin, Hong-Cheu
材料科學與工程學系
光電工程學系
Department of Materials Science and Engineering
Department of Photonics
公開日期: 2014
摘要: Three series of supramolecular mono-(i.e., Ru1G1, Ru1G2 and Ru1G3), bis-(i.e., BTRu2G1, BTRu2G2 and BTRu2G3) and tris-(i.e., TPARu3G1, TPARu3G2 and TPARu3G3) Ru-based dendritic complexes were synthesized. Their photophysical and electrochemical properties were investigated. These metallo-dendritic complexes covered a broad absorption range of 250-750 nm with optical bandgaps of 1.51-1.86 eV. The energy levels of the metallo-dendrimers can be effectively adjusted not only by different generations of dendritic thiophene arms but also by their pi-conjugated core ligands bearing various electron donor (i.e., triphenylamine) and acceptor (i.e., benzothiadiazole) moieties. Due to the donor-acceptor effect, the bis-Ru-based dendrimers containing a benzothiadiazole electron-acceptor core ligand showed the highest power conversion efficiency (PCE) among these three series of metallo-dendrimers. The tris-Ru-based architecture with a triphenylamine electron-donor core ligand revealed moderate photovoltaic performance. Among the different generations (G1-G3) of dendrimers, the third generation (G3) possessed the highest PCE values in each series of Ru-based dendrimers. Hence, the third generation bis-\'Ru\'-based dendrimer BTRu2G3 blended with PC70BM (1 : 3 w/w) showed the highest PCE value of 0.77% (without the aid of additives or annealing), which is the highest efficiency among all bulk hetero-junction (BHJ) solar cells containing metallo-dendrimers reported to date.
URI: http://hdl.handle.net/11536/25111
http://dx.doi.org/10.1039/c4py00444b
ISSN: 1759-9954
DOI: 10.1039/c4py00444b
期刊: POLYMER CHEMISTRY
Volume: 5
Issue: 18
起始頁: 5423
結束頁: 5435
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