A New Mussel-Inspired Polydopamine Sensitizer for Dye-Sensitized Solar Cells: Controlled Synthesis and Charge Transfer
- A New Mussel-Inspired Polydopamine Sensitizer for Dye-Sensitized Solar Cells: Controlled Synthesis and Charge Transfer
- 남혜진; 김보은; 고민재; Mingshi Jin; 김지만; 정덕영
- dye-sensitized; Polydopamine; Charge Transfer; dopamines; polymerization; sensitizers; solar cells
- Issue Date
- Chemistry : a European journal
- VOL 18, NO 44, 14000-14007
- The efficient electron injection by direct dye-to-TiO2 charge transfer and strong adhesion of mussel-inspired synthetic polydopamine (PDA) dyes with TiO2 electrode is demonstrated. Spontaneous self-polymerization of dopamine using dip-coating (DC) and cyclic voltammetry (CV) in basic buffer solution were applied to TiO2 layers under a nitrogen atmosphere, which offers a facile and reliable synthetic pathway to make the PDA dyes, PDA-DC and PDA-CV, with conformal surface and perform an efficient dye-to-TiO2 charge transfer. Both synthetic methods led to excellent photovoltaic results and the PDA-DC dye exhibited larger current density and efficiency values than those in the PDA-CV dye. Under simulated AM 1.5 G solar light (100 mW cm−2), a PDA-DC dye exhibited a short circuit current density of 5.50 mW cm−2, corresponding to an overall power conversion efficiency of 1.2 %, which is almost 10 times that of the dopamine dye-sensitized solar cell. The PDA dyes showed strong adhesion with the nanocrystalline TiO2 electrodes and the interface engineering of a dye-adsorbed TiO2 surface through the control of the coating methods, reaction times and solution concentration maximized the overall conversion efficiency, resulting in a remarkably high efficiency.
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