Details

Autor(en) / Beteiligte

• El-Shishtawy, Reda M
• Decoppet, Jean-David
• Al-Zahrani, Fatimah A. M
• Cao, Yiming
• Khan, Sher B
• Al-Ghamdi, Mohammed S
• Alhogbi, Basma G
• Asiri, Abdullah M
• Zakeeruddin, Shaik M
• Grätzel, Michael

Titel

Influence of redox electrolyte on the device performance of phenothiazine based dye sensitized solar cells

Ist Teil von

• New journal of chemistry, 2018, Vol.42 (11), p.945-95

Ort / Verlag

Cambridge: Royal Society of Chemistry

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We designed and synthesized a metal-free organic sensitizer based on phenothiazine as the core moiety for application in dye-sensitized solar cells (DSCs). The structure of the donor-π-bridge-acceptor (D-π-A) dye 3-(5-(7-(( E )-3,4,5-trimethoxystyryl)-10-octyl-10 H -phenothiazin-3-yl)thiophen-2-yl)-2-cyanoacrylic acid ( TMPTZT ) has tri-methoxy phenyl as a donor segment on a phenothiazine core and cyanoacrylic acid as an acceptor group. In this study, we investigated the influence of iodide/triiodide and Co(bpy) 3 2+/3+ complexes as redox electrolytes on the DSC device performance. The maximal monochromatic incident photon to current conversion efficiency (IPCE) reached a value of 70%. The solar light to electrical energy conversion efficiency of the devices with a volatile solvent based iodide/triiodide electrolyte reached up to 5.1% at AM 1.5G illumination, whereas the devices with Co(bpy) 3 2+/3+ and ionic liquid electrolytes showed efficiencies of 4.9% and 4.5%, respectively. The DSC devices were characterized using charge extraction and V oc decay techniques to understand the difference in the photovoltaic performance of this metal free organic dye with these three types of redox electrolytes. We report on a new organic dye based on phenothiazine for DSC application.