Green Solution Processed Selenium Thin-Film for Visual Alcohol Sensing

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-04-29 DOI:10.1016/j.materresbull.2025.113528

Stenny Benny, Akshay Vishwanathan Vidyanagar, Sreelakshmi Madhavanunni Rekha, S. Venkataprasad Bhat

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Abstract

Selenium (Se) is a versatile elemental semiconductor with a wide range of potential applications, owing to its polymorphic nature, low-temperature formation (< 220°C), high refractive index, and exceptional photoresponse. However, solution-based fabrication methods for Se thin films often rely on toxic and complex solvents, limiting their environmental sustainability. In this work, we present a simple, one-step synthesis of a Se precursor solution at room temperature, using a less-toxic amine-thiol-based solvent. We then explore the formation of Se thin films through spin coating of this precursor and demonstrate its innovative application for visual colorimetric alcohol sensing. Among the five primary alcohols tested, isopropyl alcohol (IPA) exhibited the most pronounced color change and improved light absorption, suggesting its superior coordination ability in forming high-quality Se thin films. The promising characteristics, including the photovoltaic behavior of the alcohol-sensitized Se film, indicate the potential use of this approach in electronics and sensing technologies.

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绿色溶液处理硒薄膜用于视觉酒精传感

硒（Se）是一种多用途元素半导体，由于其多晶性，低温形成(<；220°C)，高折射率，和特殊的光响应。然而，基于溶液的硒薄膜制造方法通常依赖于有毒和复杂的溶剂，限制了它们的环境可持续性。在这项工作中，我们提出了一个简单的，一步合成的硒前驱体溶液在室温下，使用毒性较低的氨基巯基溶剂。然后，我们探索通过该前驱体的自旋涂层形成硒薄膜，并展示其在视觉比色酒精传感中的创新应用。在5种伯醇中，异丙醇（IPA）表现出最明显的颜色变化和更好的光吸收，表明其在形成高质量Se薄膜方面具有较强的配位能力。这些有前途的特性，包括醇敏化Se薄膜的光电行为，表明了这种方法在电子和传感技术中的潜在应用。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.