All solution-processed organic photocathodes with increased efficiency and stability via the tuning of the hole-extracting layer. Issue 13 (10th March 2016)

• Record Type: Journal Article
• Authors: Bourgeteau, T.; Tondelier, D.; Geffroy, B.; Brisse, R.; Campidelli, S.; Cornut, R.; Jousselme, B.
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 13(2016)
• Page Start: 4831
• Page End: 4839
• Publication Date: 2016-03-10
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta01320a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : This study correlates the work function of the hole-extracting layer and the efficiency of photocathodes for the photo-production of hydrogen. Abstract : Photoelectrodes based on solution-processed organic semiconductors are emerging as low-cost alternatives to crystalline semiconductors and platinum. In this work, the performance and stability of P3HT:PCBM\MoS3 -based photocathodes are considerably improved by changing the hole-extracting layer (HEL). Oxides such as reduced graphene oxide, nickel oxide or molybdenum oxide are deposited via solution processes. With MoO x, a photocurrent density of 2 mA cm −2 during 1 h is obtained with the processing temperature lower than 150 °C – thus compatible with flexible substrates. Furthermore, we show that the performances are directly correlated with the work function of the HEL material, and the comparison with solid-state solar cells shows that efficient HELs are not the same for the two types of devices.