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Published on: October 5, 2019
Carbazole-Functionalized Organic Photosensitizer for Dye-Sensitized Solar Cells
Abstract:
We designed and synthesized the photosensitive π-conjugated organic dyes (CB-1, CB-2 and CB-3) with the carbazole substituted triphenylamine moiety as an electron donor unit and the cyanoacetic acid moiety as an acceptor for the application as a photosensitizer of dye-sensitized solar cells. The dyes with two carbazole units connected to triphenylamine moiety (CB-2 and CB-3) showed enhanced electron donating property than the one with one carbazole moiety as an electron donor unit (CB-1), which resulted in longer absorption maximum wavelength, higher overall photon to current conversion efficiency and IPCE values. In particular, CB-3 showed an absorption maximum wavelength at 428 nm and overall solar-to-energy conversion efficiency of 7.58% at AM 1.5 illumination (100 mW.cm-2) without mask.
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