Article

Ru complexes of thienyl-functionalized dipyrrins as NCS-free sensitizers for the dye-sensitized solar cell

Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA.
Chemical Communications (Impact Factor: 6.72). 07/2012; 48(70):8790-2. DOI: 10.1039/c2cc34311h
Source: PubMed

ABSTRACT We report the first case of Ru(II) dipyrrinates employed as dyes in dye-sensitized solar cells. These complexes exhibit panchromatic light harvesting that results in significant DSSC current densities, rendering them promising for photovoltaic applications. Adjustment of the lowest excited state energy is required to boost the power conversion efficiency.

0 Followers
 · 
228 Views
  • [Show abstract] [Hide abstract]
    ABSTRACT: A pair of isomeric ruthenium sensitizers BM1 and BM2, having TIP based ancillary ligands with a 9-phenylcarbazole tail at  or  position of the thiophene unit, shows distinguishable photovoltaic performance on DSCs (PCEs: 7.33% and 5.33% for BM1 and BM2 as compared with 6.07% for standard N3-dye).
    Dalton Transactions 09/2014; 43(44). DOI:10.1039/C4DT01832J · 4.10 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: We have been prepared a series of heteroatoms (N and/or S) doped graphene in different ratios from various doping precursors (pyridine, thiophene and bithiophene combined separately with dipyrrolemethane and used as single N and/or S precursor) by thermal reaction. The as synthesized heteroatoms-doped graphene materials have also been characterized via transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and Raman spectroscopy. The XPS and Raman investigations suggest a better dual-doping with higher conversion rate of graphitic-N and thermal reduction of oxygen into the graphene sheets. The electrochemical investigation reveals that the both N and S-doped graphene (S1N2-GN800 and S2N2-GN800) have better catalytic activity on oxygen reduction reaction (ORR) than only N-doped graphene (N3-GN800) with the assistance of synergistic effect of dual-doping. Particularly, the high thermal treated final product, N and S dual-doped graphene (S2N2-GN1000) shows remarkable electrocatalytic activity towards the ORR which not only establishes a pathway of four-electron transfer reaction but also exhibits a better fuel selectivity and stability than that of commercially available 20wt% Pt/C electrode.
    Journal of Power Sources 10/2014; 275. DOI:10.1016/j.jpowsour.2014.10.174 · 5.21 Impact Factor
  • [Show abstract] [Hide abstract]
    ABSTRACT: This review is aimed at updating the current advance of metal complexes bearing pyridyl azolates or relevant functionality. Of particular emphasis is the emerging metal complexes, which show bright prospect in the energy relevant issues such as organic light emitting diodes (OLEDs) and dye sensitized solar cells (DSCs). Our motive lies in the development of OLED phosphors as well as the realization of superior sensitizers in DSCs. It covers a great extension of azolates based derivatives as well as a large variety of core metal ions spanning from Re(I), Ru(II), Os(II), Ir(III), Pt(II) and to Cu(I). Their synthetic strategy, chemical/physical and photophysical properties and electroluminescence as a function of chelate or metal characteristics are systematically discussed. The potential applications are far-reaching in the wake of the previously unrecognized feature on harnessing the highly excited states, which are then realized by several new designs endowed with this unique property. Also, the interplay of the ligand design, i.e, the sameness and difference, between lighting and photovoltaic oriented metal complexes is highlighted.
    Coordination Chemistry Reviews 09/2014; 281. DOI:10.1016/j.ccr.2014.08.012 · 12.10 Impact Factor