Date

Place

[P2-151]
14:00 ~ 15:30
Title:Structural Planarity and Conjugation Effects of Multi-Carbazole Derivatives Organic Dyes for Dye-Sensitized Solar Cells
Hyo Jeong Jo, Jung Eun Nam, Dae-Hwan Kim, and Jin-Kyu Kang (DGIST, Korea)
Abstract: ?Dye-sensitized solar cells (DSSCs) based on Ru-complexes have been achieved fairly high solar energy-to-conversion efficiencies above 12 %. However, the Ru-complexes have some problems such as manufacturing costs and environmental issues. Recently, organic dye molecules have been employed as promising alternatives to the Ru-complexes because of potential advantages (high molar extinction coefficient, convenient, customized molecular design) for photophysical and photochemical properties, as well as low-cost production. In this work, we demonstrate the synthesis of organic photosensitizing dyes with varying carbazole-based chromophores in a molecule, and used as sensitizers for dye-sensitized solar cells (DSSCs). We found that organic dye with thiophene units exhibited a higher molar extinction coefficient and red-shifted absorption, which leads to an improved light harvesting efficiency. Their photovoltaic properties were measured I-V curves, incident photon-to-current (IPCE) efficiencies and impedance analysis by comparison with that of ruthenium dye in same manufacturing condition.
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