Influence of 4-guanidinobutyric acid as coadsorbent in reducing recombination in dye-synthesized solar cells

Article Abstract:

Dye-synthesized solar cells based on nanocrystalline TiO2 were fabricated with an amphiphilic ruthenium sensitizer [Ru(4,4'-dicarboxylic acid-2,2'-bipyridine) (4,4'-bis(p-hexyloxystyryl)-2,2'-bipyridine)(NCS)2], coded as K-19 and 4-guanidininobutyric acid (GBA) as coadsorbent. The results indicate that GBA shifted the conduction band of TiO2 towards a more negative potential and reduced interfacial charge-transfer reaction from conduction band electrons to triiodide in the electrolyte.

All Other Basic Organic Chemical Manufacturing, Industrial Organic Chemicals, Cyclic Crude and Intermediate Manufacturing, Pyridine, Butyric Acid, Carboxylic acids, Atomic properties

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Amphiphilic ruthenium sensitizer with 4,4-diphosphonic acid-2,2'-bipyridine as anchoring ligand for nanocrystalline dye sensitized solar cells

Article Abstract:

A new amphiphilic polypyridyl ruthenium sensitizer with two phosphonic acid anchoring groups was synthesized and used for dye-sensitized solar cells with a total power conversion efficiency of greater than or equal to 8.0 percent under simulated air mass 1.5 sunlight. The new synthesizer had excellent light soaking stabilities at moderate temperature stress in the presence of both 3-methyloxypropionitrile based and solvent-free ionic liquid electrolytes.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), Ruthenium, Chemical properties

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Enhance the performance of dye-sensitized solar cells by co-grafting amphiphilic sensitizer and hexadecylmalonic acid on TiO2 nanocrystals

Article Abstract:

The co-grafting an amphiphilic dye with hexadecylmalonic acid onto TiO2 semiconductor nanocrystals remarkably enhanced the photocurrent, photovoltage, and power conversion efficiency of dye-sensitized solar cells is demonstrated. For the first time, long-term stable dye-sensitized solar cells (DSCs) with about 8% power conversion efficiency are fabricated.

Science & research, All Other Miscellaneous Nonmetallic Mineral Product Manufacturing, Crystals, Research, Electric properties, Titanium dioxide, Titanium dioxide crystals

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