Controlling the Crystallographic Orientation of Sb2Se3 Film for Efficient Photoelectrochemical Water Splitting. Issue 4 (23rd December 2021)

• Record Type: Journal Article
• Authors: Wang, Manjing; Wang, Sanlong; Zhang, Qixing; Pan, Sanjiang; Zhao, Ying; Zhang, Xiaodan
• Is Part Of: Solar RRL. Volume 6:Issue 4(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-12-23
• Subjects: charge transport -- photoelectrochemical water splitting -- Sb/Se ratio -- Sb2Se3 photocathodes -- solar-to-hydrogen efficiency; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202100798
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : Finding a cost‐effective semiconductor with commercial performance for photoelectrochemical (PEC) water splitting remains challenging. Sb2 Se3, as a low‐cost semiconductor, has excellent photo/electric properties for PEC water splitting. Via adjusting the Sb/Se ratio in the precursor ink, the Sb2 Se3 with favorable crystallographic orientation can be effectively controlled. The ink with an atomic ratio of Sb/Se = 1:3 induces the growth of a compact Sb2 Se3 film with a preferred orientation, resulting in rapid charge transport and high photocurrent. After depositing TiO2 and Pt in turn, the photocathode with a structure of FTO/Au/Sb2 Se3 /TiO2 /Pt exhibits a photocurrent density of 11.3 mA cm −2 at 0 VRHE . An unassisted solar water splitting device integrating the Sb2 Se3 ‐based photocathode with an inorganic perovskite photovoltaic cell achieves a solar‐to‐hydrogen efficiency of 2.45%. The efficient Sb2 Se3 ‐based photocathode shows promising potential for solar fuel production. Abstract : Antimony selenide exhibits excellent optical and electrical properties, making it very suitable for photoelectrochemical water splitting as a photocathode. Here, a green and easy‐to‐operate solution method is introduced for preparing a compact Sb2 Se3 film with preferred crystallographic orientation. The Sb2 Se3 photocathode with [221] preferred orientation exhibits a photocurrent density of 11.3 mA cm −2 at 0 VRHE .