Scholarlink

<p>This study aims to investigate the effects of copper (Cu) doping on the structural and optical properties of cadmium sulfide (CdS) thin films, with a focus on their potential applications in optoelectronic devices. CdS sol-gel was doped with Cu nanoparticles synthesized using a laser ablation method, and thin films were fabricated via spin-coating. Copper nanoparticles were produced by irradiating a Cu target with a Q-switched Nd: YAG laser (1064&#xa0;nm) at pulse numbers ranging from 500 to 2500. X-ray diffraction (XRD) analysis confirmed a hexagonal nanostructure for CdS, with an average crystal size of 11.57&#xa0;nm in pure films, while Cu doping resulted in crystal sizes between 9.97&#xa0;nm and 13.34&#xa0;nm depending on pulse number. Atomic force microscopy (AFM) revealed reduced grain sizes from 72.44&#xa0;nm in pure films to 39.56&#xa0;nm in Cu-doped films at 2500 pulses. Optical absorption spectra (300–800&#xa0;nm) indicated a decrease in the band gap from 2.39&#xa0;eV (pure films) to 2.19&#xa0;eV (doped films with the highest pulse number). Nonlinear optical properties, evaluated using the Z-scan technique, showed variations in thermal refractive index (<InlineEquation ID="IEq1"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="40516_2025_284_Article_IEq1.gif" Format="GIF" Height="12" Rendition="HTML" Resolution="72" Type="Linedraw" Width="17" /> </InlineMediaObject> <EquationSource Format="TEX">\(\:{n}_{2}\)</EquationSource> </InlineEquation>) and optical limiting (OL) behavior with increasing pulse number. The band gap reduction improves the material’s visible light absorption. Additionally, the observed nonlinear optical behavior suggests potential applications in optical selectors and switching devices, highlighting the versatility of copper-doped CdS films in optoelectronics.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Influence of Laser Ablation-Induced Cu Doping on the Structural, Morphological, and Optical Properties of CdS Thin Films for Optoelectronic Applications

  • 期刊论文

  • 发表日期：

    2025年2月26日

查看全文
  • Jamal Aziz,
  • R. K. Fakher Alfahed,
  • Faten Sh. Zainulabdeen

摘要

This study aims to investigate the effects of copper (Cu) doping on the structural and optical properties of cadmium sulfide (CdS) thin films, with a focus on their potential applications in optoelectronic devices. CdS sol-gel was doped with Cu nanoparticles synthesized using a laser ablation method, and thin films were fabricated via spin-coating. Copper nanoparticles were produced by irradiating a Cu target with a Q-switched Nd: YAG laser (1064 nm) at pulse numbers ranging from 500 to 2500. X-ray diffraction (XRD) analysis confirmed a hexagonal nanostructure for CdS, with an average crystal size of 11.57 nm in pure films, while Cu doping resulted in crystal sizes between 9.97 nm and 13.34 nm depending on pulse number. Atomic force microscopy (AFM) revealed reduced grain sizes from 72.44 nm in pure films to 39.56 nm in Cu-doped films at 2500 pulses. Optical absorption spectra (300–800 nm) indicated a decrease in the band gap from 2.39 eV (pure films) to 2.19 eV (doped films with the highest pulse number). Nonlinear optical properties, evaluated using the Z-scan technique, showed variations in thermal refractive index ( \(\:{n}_{2}\) ) and optical limiting (OL) behavior with increasing pulse number. The band gap reduction improves the material’s visible light absorption. Additionally, the observed nonlinear optical behavior suggests potential applications in optical selectors and switching devices, highlighting the versatility of copper-doped CdS films in optoelectronics.