| 초록 |
Dye-sensitized solar cells (DSSCs) based on Ru-complexes have been achieved fairly high solar energy-to-conversion efficiencies above 11 %. 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. This work reports a metal-free sensitizer using a phenothiazine unit as the donor, thiophene and 3,4-ethylenedioxythiophene unit as theπ-conjugated bridge and a cyanoacetic acid that acts as the anchoring group for attachment on the metal oxide and as the electron acceptor. Their photovoltaic properties were measured I-V curves, incident photon-to-current (IPCE) efficiencies, impedance analysis, electron lifetimes (τ). |
