Bi2Se3/WSe2 heterojunction for enhanced photoelectrochemical water splitting

被引:0
|
作者
Singh, Bheem [1 ,2 ]
Kumar, Rahul [1 ,2 ]
Behera, Govinda Chandra [3 ]
Gautam, Sudhanshu [1 ,2 ]
Gupta, Niyati [4 ]
Ganesan, Ramakrishnan [5 ]
Roy, Somnath C. [3 ]
Kushvaha, Sunil Singh [1 ,2 ]
机构
[1] CSIR Natl Phys Lab, Dr KS Krishnan Marg, New Delhi 110012, India
[2] Acad Sci & Innovat Res AcSIR, Ghaziabad 201002, India
[3] Indian Inst Technol Madras, Dept Phys, Chennai 600036, India
[4] Cluster Univ Jammu, Dept Phys, Jammu 180004, India
[5] Birla Inst Technol & Sci Pilani, Dept Chem, Hyderabad Campus, Hyderabad 500078, Telangana, India
关键词
thin film; XPS; heterostructure; renewable; sustainability; WSE2; THIN-FILMS; PERFORMANCE; EFFICIENT;
D O I
10.1557/s43581-024-00124-z
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
We report magnetron-sputtering-grown Bi2Se3/WSe2 heterojunction on thin tungsten (W) metal foil towards photoelectrochemical (PEC) water-splitting application. The crystalline and structural quality of prepared heterojunction was examined by X-ray diffraction and Raman spectroscopy. The X-ray photoelectron spectroscopy confirmed the chemical composition of Bi2Se3/WSe2. The PEC measurements were performed in 0.5 M Na2SO4 electrolyte solution under simulated sunlight (AM = 1.5 G) conditions. The PEC measurements showed the improved photocurrent density of Bi2Se3/WSe2 with an obtained photocurrent density of similar to 205 mu A/cm(2), which is 2.7 times higher compared to bare WSe2. The enhanced photocurrent density of Bi2Se3/WSe2 could be attributed to the creation of additional active sites, as well as type-II band alignment between Bi2Se3 and WSe2 which helps easy separation of the photogenerated electron and hole pair by reducing charge recombination.
引用
收藏
页码:94 / 101
页数:8
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