Organic sensitizers with bridged triphenylamine donor units for efficient dye-sensitized solar cells

Cai, Liping and Tsao, Hoi Nok and Zhang, Wei and Wang, Long and Xue, Zhaosheng and Grätzel, Michael and Liu, Bin (2013) Organic sensitizers with bridged triphenylamine donor units for efficient dye-sensitized solar cells. Advanced Energy Materials, 3 (2). pp. 200-205. ISSN 1614-6832

Full content URL: http://dx.doi.org/10.1002/aenm.201200435

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Abstract

Bridged triphenylamine was chosen as the donor unit for metal-free organic sensitizers in dye-sensitized solar cells (DSSCs). The easily constructed alkene linkage between the donor and the spacer improves the molecule's delocalization and causes a large red shift in its absorption peaks. Planarization of the donor and the use of alkene linkage have proven powerful in extending the red light response of the sensitizer, leading to a significant enhancement in photocurrent density of the device. As a result, devices sensitized with target sensitizers LC-2 (η = 7.51%) and LC-3 (η = 8.00%) exhibited more than 70% efficiency increase over devices sensitized with the reference sensitizer LC-1 (η = 4.44%).

Keywords:Organic Sensitizers, Triphenylamine, Dye-Sensitized Solar Cells
Subjects:F Physical Sciences > F112 Colour Chemistry
F Physical Sciences > F200 Materials Science
F Physical Sciences > F160 Organic Chemistry
Divisions:College of Science > School of Chemistry
ID Code:22674
Deposited On:01 Apr 2016 10:12

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