ZnS-GaP Solid Solution Thin Films with Enhanced Visible-Light Photocurrent

Musavigharavi，Pariasadat1; Kurnia，Fran1; Xie，Lin2; Park，Collin Keon Young1; Ng，Yun Hau3; He，Jiaqing2; Hart，Judy N.1; Valanoor，Nagarajan1

2021

10.1021/acsaem.1c01733

ACS Applied Energy Materials   影响因子和分区

2574-0962

2574-0962

A high photocurrent, particularly under visible-light wavelengths, is critical for developing a semiconductor photoelectrode for efficient solar-to-hydrogen conversion. Here, we demonstrate a ZnS-GaP solid solution thin film grown on a silicon substrate by pulsed laser deposition, where the growth conditions are tailored to promote intermixing throughout the entire film thickness. The photocurrent density of this solid solution film reaches a maximum of ∼27 μA/cm2 at ∼0.9 V bias, which is ∼3 times higher than that of a comparable multilayered ZnS-GaP film, where ZnS and GaP form distinct layers. In addition, the solid solution film shows up to 50 times stronger photosensitivity compared to the multilayered film. Examination of the local atomic structure and nanoscale chemistry of the solid solution thin film using transmission electron microscopy and energy-dispersive X-ray spectroscopy techniques revealed the formation of quaternary solid solution (Ga,Zn)(P,S) and ternary (Ga,Zn)Sb phases, as well as some trace amounts of binary GaSy. These phases have previously been shown to have a direct band gap in the energy range of visible light. We thus attribute the enhanced photocurrent and photosensitivity in the solid solution film to the presence of the aforementioned phases as well as defects.

GaP photocurrent thin film material heterointerfaces thin films transmission electron microscopy ZnS

EI ; SCI

英语

其他

ARC[DP210102694]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000711236300036

AMER CHEMICAL SOC

20214111008007

Energy dispersive spectroscopy ; Energy gap ; Gallium phosphide ; High resolution transmission electron microscopy ; Hydrogen production ; II-VI semiconductors ; III-V semiconductors ; Light ; Light sensitive materials ; Photocurrents ; Photosensitivity ; Solar power generation ; Solid solutions ; Thin films ; Wide band gap semiconductors

Gas Fuels:522 ; Solar Power:615.2 ; Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Light/Optics:741.1 ; Optical Devices and Systems:741.3 ; Inorganic Compounds:804.2 ; Solid State Physics:933

2-s2.0-85116691552

Scopus

1.School of Materials Science and Engineering,UNSW,Sydney,2052,Australia
2.Department of Physics,Southern University of Science and Technology (SUSTech),Shenzhen,518055,China
3.School of Energy and Environment,City University of Hong Kong,Kowloon,Tat Chee Avenue,100071,Hong Kong

Musavigharavi，Pariasadat,Kurnia，Fran,Xie，Lin,et al. ZnS-GaP Solid Solution Thin Films with Enhanced Visible-Light Photocurrent[J]. ACS Applied Energy Materials,2021,4(10):10756-10761.

Musavigharavi，Pariasadat.,Kurnia，Fran.,Xie，Lin.,Park，Collin Keon Young.,Ng，Yun Hau.,...&Valanoor，Nagarajan.(2021).ZnS-GaP Solid Solution Thin Films with Enhanced Visible-Light Photocurrent.ACS Applied Energy Materials,4(10),10756-10761.

Musavigharavi，Pariasadat,et al."ZnS-GaP Solid Solution Thin Films with Enhanced Visible-Light Photocurrent".ACS Applied Energy Materials 4.10(2021):10756-10761.