• 文献标题:   Graphene oxide:Fe2O3 nanocomposites for photodetector applications: experimental and ab initio density functional theory study
  • 文献类型:   Article
  • 作  者:   IDISI DO, AHIA CC, MEYER EL, BODUNRIN JO, BENECHA EM
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:  
  • 通讯作者地址:  
  • 被引频次:   0
  • DOI:   10.1039/d3ra00174a
  • 出版年:   2023

▎ 摘  要

In this report, a GO:Fe2O3 nanocomposite was synthesized using a one-step covalent attachment approach using a sol-gel technique. The optical absorbance, photoconductive, photo-capacitive, and electrical properties were obtained using spectroscopy, and current-voltage (I-V) measurements. An enhanced optical absorbance with corresponding band gap reduction is observed when Fe2O3 nanoparticles are incorporated in GO. A corresponding enhanced photoconductance in the order of x10(1) was observed due to the impact of band gap narrowing. The enhanced photoconductivity and photo-capacitance can be attributed to energy and charge transfer between GO and Fe atoms, leading to the generation of photo-induced excitons. Density function theory calculations indicate increased charge transfer when GO is doped with Fe-O atoms, which is consistent with experimental data. The observed results could potentially enable the use of GO:Fe2O3 nanocomposites for photodetectors and other optoelectronic applications.