Indolizine‐Based Donors as Organic Sensitizer Components for Dye‐Sensitized Solar Cells. Issue 7 (10th December 2014)

• Record Type: Journal Article
• Authors: Huckaba, Aron J.; Giordano, Fabrizio; McNamara, Louis E.; Dreux, Katelyn M.; Hammer, Nathan I.; Tschumper, Gregory S.; Zakeeruddin, Shaik M.; Grätzel, Michael; Nazeeruddin, Mohammad K.; Delcamp, Jared H.
• Is Part Of: Advanced energy materials. Volume 5:Issue 7(2015:Apr.)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2014-12-10
• Subjects: Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201401629
• Languages: English
• ISSNs: 1614-6832

Abstract

<abstract abstract-type="main" xml:lang="en"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Strong electron‐donating functionality is desirable for many organic donor‐π‐bridge‐acceptor (D‐π‐A) dyes. Strategies for increasing the electron‐donating strength of common nitrogen‐based donors include planarization of nitrogen substituents and the use of low resonance‐stabilized energy aromatic ring‐substituted nitrogen atoms. Organic donor motifs based on the planar nitrogen containing heterocycle indolizine are synthesized and incorporated into dye‐sensitized solar cell (DSC) sensitizers. Resonance active substitutions at several positions on indolizine in conjugation with the D‐π‐A π‐system are examined computationally and experimentally. The indolizine‐based donors are observed to contribute electron density with strengths greater than triarylamines and diarylamines, as evidenced by UV/Vis, IR absorptions, and oxidation potential measurements. Fluorescence lifetime studies in solution and on TiO₂ yield insights in understanding the performance of indolizine‐based dyes in DSC devices.</p> </abstract>