TiO2 Anatase Solutions for Electron Transporting Layers in Organic Photovoltaic Cells. Issue 17 (26th July 2017)

• Record Type: Journal Article
• Authors: El Kass, Moustafa; Brohan, Luc; Gautier, Nicolas; Béchu, Solène; David, Céline; Lemaitre, Noëlla; Berson, Solenn; Richard‐Plouet, Mireille
• Is Part Of: Chemphyschem. Volume 18:Issue 17(2017)
• Page Start: 2390
• Page End: 2396
• Publication Date: 2017-07-26
• Subjects: colloidal solutions -- electron transporting layer -- organic photovoltaics -- reflux process -- TiO2 nanoparticles; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201700306
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: Reflux of a solution of [Ti8 O12 (H2 O)24 ]Cl8 ⋅HCl⋅ 7 H2 O as titanium precursor at 120 °C for 24 h leads to a transparent colloidal solution of nanosized crystallized anatase TiO2 . The adjustment of the particle size and composition of the dispersant is monitored through the initial water content while controlling the conversion of propylene carbonate into propylene glycol during reflux. The solutions were processed as thin films to produce electron transporting layers in hybrid bulk heterojunction solar cells, by using a blend of P3HT:PCBM polymers as absorbers, in inverted architectures. The solutions obtained by reflux were demonstrated to produce suitable electron transporting layers. Abstract : Solutions for solar cells : Highly stable colloidal solutions of nanosized crystallized anatase TiO2 are produced by using a polyol reflux method. The initial water amount in the solvent mixture is selected to monitor the particle size as well as other physicochemical properties of the obtained solutions. These solutions were demonstrated to produce suitable electron transport layers in inverted solar cells.