Alteration of the electronic structure and the optical properties of graphitic carbon nitride by metal ion doping

Mohammad Mubeen; Kavita Deshmukh; D R Peshwe; S J Dhoble; Abhay D Deshmukh

doi:10.1016/j.saa.2018.09.039

Alteration of the electronic structure and the optical properties of graphitic carbon nitride by metal ion doping

Spectrochim Acta A Mol Biomol Spectrosc. 2019 Jan 15:207:301-306. doi: 10.1016/j.saa.2018.09.039. Epub 2018 Sep 21.

Authors

Mohammad Mubeen¹, Kavita Deshmukh², D R Peshwe², S J Dhoble³, Abhay D Deshmukh⁴

Affiliations

¹ Energy Materials and Devices Laboratory, Department of Physics, RTM Nagpur University, Nagpur, M.H. 440033, India.
² Department of MME, Visvesvarya National Institute of Technology, Nagpur, M.H. 440033, India.
³ Energy Materials and Devices Laboratory, Department of Physics, RTM Nagpur University, Nagpur, M.H. 440033, India. Electronic address: sjdhoble@rediffmail.com.
⁴ Energy Materials and Devices Laboratory, Department of Physics, RTM Nagpur University, Nagpur, M.H. 440033, India. Electronic address: abhay.d07@gmail.com.

PMID: 30265945
DOI: 10.1016/j.saa.2018.09.039

Abstract

The photoluminescence quenching of graphitic carbon nitride (GCN) was systematically investigated with the doping of transition metal ions. The photoluminescence spectra of metal doped and pristine GCN were monitored and the trend of quenching efficiency was found to be Cu²⁺ > Co²⁺ > Mn²⁺. Interestingly, with the increasing doping concentration of different metal ions simultaneous red shift and luminescence quenching was determined in the photoluminescence spectra as well as increased absorption tail in longer wavelength hence enhancement in the bandgap. The change in the optical properties could be mainly due to structural reconstruction and doping induced electronic redistribution is discussed.

Keywords: Energy; Graphitic carbon nitride; Luminescence; Optical properties; Photoluminescence.