Modulation of Sb2Se3 longitudinal growth by CdCl2 treatment for high-performance photodetectors

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Letters Pub Date : 2024-11-23 DOI:10.1016/j.matlet.2024.137764

Jiaojiao Liu , Ying Wu , Zhenbo Chen , Xiaoming Yu , Xuan Yu , Zhenhua Li , Hai Zhang , Yingtang Zhou , Jing Zhou , Yu Cao

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引用次数: 0

Abstract

Antimony selenide (Sb₂Se₃) has attracted much attention in photodetectors (PDs) for its abundant reserves, low toxicity, low price, and high absorption coefficient. While the PDs performance has been limited by the transverse growth pattern of Sb₂Se₃. In this study, CdCl₂-treated SnO₂ electron transport layer (ETL) substrate has been used to grow Sb₂Se₃, which induces the preferential growth of Sb₂Se₃ along the (002) direction, and the grains are transformed from transverse to longitudinal. This enhanced carrier mobility, resulted in improved photocurrent (0.489 mA), responsivity (70 mA W⁻¹), and specific detectivity (9.29 × 10¹³ Jones) than the pristine device, which is enhanced by 18, 17, and 8 times, respectively. The results indicate that the CdCl₂ treatment effectively optimizes the SnO₂ ETL interfacial properties and regulates the longitudinal growth of Sb₂Se₃ grains, which guides the further development of Sb₂Se₃ PDs.

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来源期刊

Materials Letters 工程技术-材料科学：综合

CiteScore

5.60

自引率

3.30%

发文量

1948

审稿时长

50 days

期刊介绍： Materials Letters has an open access mirror journal Materials Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Materials Letters is dedicated to publishing novel, cutting edge reports of broad interest to the materials community. The journal provides a forum for materials scientists and engineers, physicists, and chemists to rapidly communicate on the most important topics in the field of materials. Contributions include, but are not limited to, a variety of topics such as: • Materials - Metals and alloys, amorphous solids, ceramics, composites, polymers, semiconductors • Applications - Structural, opto-electronic, magnetic, medical, MEMS, sensors, smart • Characterization - Analytical, microscopy, scanning probes, nanoscopic, optical, electrical, magnetic, acoustic, spectroscopic, diffraction • Novel Materials - Micro and nanostructures (nanowires, nanotubes, nanoparticles), nanocomposites, thin films, superlattices, quantum dots. • Processing - Crystal growth, thin film processing, sol-gel processing, mechanical processing, assembly, nanocrystalline processing. • Properties - Mechanical, magnetic, optical, electrical, ferroelectric, thermal, interfacial, transport, thermodynamic • Synthesis - Quenching, solid state, solidification, solution synthesis, vapor deposition, high pressure, explosive