A Three‐Dimensional Architecture for Hydrogen‐Evolving, Host/Guest, Hybrid Organic/Inorganic Photocathodes Based on Nanolamellar MoO3 Scaffolds. Issue 3 (4th January 2018)

• Record Type: Journal Article
• Authors: Ghadirzadeh, Ali; Fumagalli, Francesco; Mezzetti, Alessandro; Bellani, Sebastiano; Meda, Laura; Antognazza, Maria Rosa; Di Fonzo, Fabio
• Is Part Of: ChemPhotoChem. Volume 2:Issue 3(2018)
• Page Start: 283
• Page End: 292
• Publication Date: 2018-01-04
• Subjects: host-guest systems -- hydrogen evolution -- nanostructures -- organic-inorganic hybrids -- photocathodes; Photochemistry -- Periodicals; Periodicals; Electronic journals; 541.35
• DOI: 10.1002/cptc.201700159
• Languages: English
• ISSNs: 2367-0932

Abstract

Abstract: This work reports on the synthesis and characterization of a three‐dimensional hybrid organic/inorganic photocathode host/guest architecture based on nanolamellar MoO3 scaffolds, where light absorption and charge collection are orthogonal and active surface area is maximized. The proposed nanostructured architecture combines optimized optoelectrical properties and structural–morphological features, resulting in a photocurrent density of 2 mA cm −2 at +0.18 VRHE and an onset potential of +0.65 VRHE . The nanostructured host scaffold presents efficient photon trapping and increased surface area to accommodate the thin organic absorber layer. The ensuing absorption/collection decoupling significantly improves the photoelectrochemical performance, especially when compared to the flat‐stack reference device, suggesting that out‐of‐plane film nanostructuration may provide future opportunity for the design of efficient photoelectrodes. Abstract : Furry photoelectrodes : A 3D hybrid organic/inorganic photocathode host/guest architecture based on nanolamellar MoO3 scaffolds was prepared. The ensuing absorption/collection decoupling significantly improves the photoelectrochemical performance, especially when compared to the flat‐stack reference device, suggesting that out‐of‐plane film nanostructuration may provide future potential in the design of efficient photoelectrodes.