Jump to main content
Jump to site search

Issue 5, 2014
Previous Article Next Article

Harvesting UV photons for solar energy conversion applications

Author affiliations

Abstract

We report the synthesis and characterization of five new donor–π–spacer–acceptor dye molecules with a diphenylamine donor, fluorene–1,2,5-oxadiazole spacers and a range of acceptor/anchor groups (carboxylic acid 1, cyanoacrylic acid 2 and 3, alcohol 4 and cyano 5) to facilitate electron injection from the excited dye into the TiO2 photoanode in dye-sensitized solar cells (DSSCs). Detailed photophysical studies have probed the dyes' excited state properties and revealed structure–property relationships within the series. Density functional theory (DFT) and time dependent DFT (TDDFT) calculations provide further insights into how the molecular geometry and electronic properties impact on the photovoltaic performance. A special feature of these dyes is that their absorption features are located predominantly in the UV region, which means the dye-sensitized TiO2 is essentially colorless. Nevertheless, DSSCs assembled from 1 and 2 exhibit photovoltaic power conversion efficiencies of η = 1.3 and 2.2%, respectively, which makes the dyes viable candidates for low-power solar cells that need to be transparent and colorless and for applications that require enhanced harvesting of UV photons.

Graphical abstract: Harvesting UV photons for solar energy conversion applications

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 22 Oct 2013, accepted on 25 Nov 2013 and first published on 25 Nov 2013


Article type: Paper
DOI: 10.1039/C3CP54914C
Citation: Phys. Chem. Chem. Phys., 2014,16, 2090-2099
  •   Request permissions

    Harvesting UV photons for solar energy conversion applications

    M. Wielopolski, K. E. Linton, M. Marszałek, M. Gulcur, M. R. Bryce and J. E. Moser, Phys. Chem. Chem. Phys., 2014, 16, 2090
    DOI: 10.1039/C3CP54914C

Search articles by author