DataVXACS Applied Nano MaterialsPaper
journal article·2024-01-26

Synthesis and Interface Engineering in Heterojunctions of Tin-Selenide-Based Nanostructures for Photoelectrochemical Water Splitting

Sunil V. Barma, Sagar B. Jathar, Yi-Teng Huang, Yogesh A. Jadhav, Ganesh K. Rahane, Avinash V. Rokade, Mamta P. Nasane, Swati N. Rahane, Russell W. Cross, Mahesh P. Suryawanshi, Sae Byeok Jo, Robert L. Z. Hoye, Sandesh R. Jadkar, Nelson Y. Dzade, Sachin R. Rondiya

ACS Applied Nano Materials· Volume 7· Issue 2
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Source abstract

Abstract

SnSe nanomaterials are challenging to use in sustainable energy production due to difficulties in phase-pure synthesis and efficient charge-carrier separation. We demonstrate a systematic facile synthesis method with an in-depth nucleation and growth mechanism for the rational design of phase-pure and morphology-controlled SnSe-based efficient and cost-effective photocatalysts. Transient absorption spectroscopy measurements are performed to investigate the charge-carrier kinetics of SnSe microflowers (MFs), which exhibit a free charge-carrier lifetime of 6.2 ps. Although the bare SnSe, CdSe, and ZnSe photoanodes demonstrate sizable photocurrents, the construction of CdSe/SnSe and ZnSe/SnSe heterojunctions dramatically improves the photoelectrochemical devices activity. The CdSe/SnSe photoanode shows higher photocurrents of 35 μA cm –2, compared to the ZnSe/SnSe (15 μA cm –2 ) heterojunction and the individual SnSe (10 μA cm –2 ), CdSe (7 μA cm –2 ), and ZnSe (1 μA cm –2 ). The decent photoactivity of the CdSe/SnSe photoanode is attributed to the desired type-II band alignment and very small band offset (0.08 eV) that exists across the interface, which promotes the efficient separation of photogenerated electron–hole pairs confirmed by cyclic voltammetry measurements and is corroborated by first-principles density functional theory calculations. These findings should open new avenues for the design and development of advanced next-generation tin selenide-based heterostructures for efficient PEC water-splitting applications.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Advanced Photocatalysis Techniques · Quantum Dots Synthesis And Properties · Copper-based nanomaterials and applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics, Savitribai Phule Pune University, Pune 411007, India

School of Chemical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea

SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University, Suwon 16419, Republic of Korea

Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, U.K.

Symbiosis Center for Nanoscience and Nanotechnology (SCNN), Symbiosis International (Deemed University) (SIU), Lavale, Pune, Maharashtra 412115, India

Department of Materials Engineering, Indian Institute of Science, Bangalore 560012, India

School of Chemistry, Cardiff University, Main Building, Park Place, Cardiff, Wales CF10 3AT, U.K.

School of Photovoltaic and Renewable Energy Engineering, University of New South Wales, Sydney, New South Wales 2052, Australia

SKKU Institute of Energy Science and Technology (SIEST), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea

Department of Materials, Imperial College London, Exhibition Road, London SW7 2AZ, U.K.

Department of Energy and Mineral Engineering, Pennsylvania State University, University Park, Pennsylvania 16802, United States

Funding

Engineering and Physical Sciences Research Council · Indo-French Centre for the Promotion of Advanced Research · University Grants Commission · Indian Institute of Science · Department of Science and Technology, Ministry of Science and Technology, India · Savitribai Phule Pune University · Chhatrapati Shahu Maharaj Research Training and Human Development Institute · John and Willie Leone Family Department of Energy and Mineral Engineering, College of Earth and Mineral Sciences, Pennsylvania State University · Ministry of Education, Taiwan

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