| 초록 |
To against recombination process of injected electron with I3- at the surface of TiO2 in DSSCs, we used polyester hydroxyl acetylene bis(hydroxymethyl) propanoic acid dendron (dendron) as co-adsorbent to TiO2 nanoparticles. DSSCs were prepared with 13nm sized TiO2 nanocrystalline, RuL2(NCS)2:2TBA (L = 2,2’-bipyridyl-4,4’-decarboxylic acid, TBA = tetrabutylammonium) (N719) as a dye, and 1-methyl-3-propyl imidazolium/I2/acetonitrile as a liquid electrolyte. Counter electrode was prepared with H2PtCl6 (0.01M) in iso-propyl alcohol. The DSSCs performance was measured under 1.5 AM light. (1 sun, with 0.25cm2 mask) When dendron was used as co-adsorbent, Voc is nearly constant but Jsc is increased. Effect of Dendron as coadsorbent in DSSC was investigated by electrochemical impedance spectroscopy and incident monochromatic photon-to-current conversion efficiency. |
