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<p>Chlorophyll thin films were obtained from olive leaves, and film thicknesses were deposited on glass substrates using a spin-coating method in this study. The microstructure, morphology, and elemental analyses of the films by XRD, SEM, and EDX, respectively, have been identified and discussed. The films were optically and electrically characterized to assess their possible applications in butane (C4H10) gas sensing at room temperature (RT). The sensing mechanism was discussed in terms of adsorption–desorption processes, while the effect of film thickness, humidity, and indium pre-coating was thoroughly examined. The optimal configuration of a 300 nm film of chlorophyll pre-coated with a 50 nm indium film showed excellent performance, including a 153% response at 100 ppm butane, reasonable response/recovery time (9/13 s), good selectivity to common interfering gases, and durable stability. Our studies demonstrated that chlorophyll, a natural, inexpensive, and green material, can be utilized as an element in high-performance gas sensors at ambient temperature. As a result, chlorophyll has replaced costly inorganic sensing materials as a sustainable replacement.</p>

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Optimization of chlorophyll thin films’ optoelectronic properties for room temperature butane gas sensing

  • 期刊论文

  • 发表日期：

    2026年1月6日

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  • A. Mindil,
  • M. Mohery,
  • Moumen S. Kamel,
  • Y. A. Taya,
  • W. S. Mohamed,
  • E. Kh. Shokr

摘要

Chlorophyll thin films were obtained from olive leaves, and film thicknesses were deposited on glass substrates using a spin-coating method in this study. The microstructure, morphology, and elemental analyses of the films by XRD, SEM, and EDX, respectively, have been identified and discussed. The films were optically and electrically characterized to assess their possible applications in butane (C4H10) gas sensing at room temperature (RT). The sensing mechanism was discussed in terms of adsorption–desorption processes, while the effect of film thickness, humidity, and indium pre-coating was thoroughly examined. The optimal configuration of a 300 nm film of chlorophyll pre-coated with a 50 nm indium film showed excellent performance, including a 153% response at 100 ppm butane, reasonable response/recovery time (9/13 s), good selectivity to common interfering gases, and durable stability. Our studies demonstrated that chlorophyll, a natural, inexpensive, and green material, can be utilized as an element in high-performance gas sensors at ambient temperature. As a result, chlorophyll has replaced costly inorganic sensing materials as a sustainable replacement.