OICC Press Journal of Theoretical and Applied Physics 2251-7235 18 2 2024 03 30 Energy spectra of Deng Fan Potential within the framework of Relativistic KG equation using Extended Nikiforov-Uvarov Approach 10.57647/j.jtap.2024.1802.18 EN Akpan Ndem Ikot Research group for fractional calculus theory and applications, Science and Technology Research Institute, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand 0000-0002-1078-262X Uduakobong Sunday Okorie Department of Physics, Akwa Ibom State University, Ikot Akpaden, Uyo, Nigeria 0000-0002-5660-0289 Precious Ogbonda Amadi Department of Physics, Ignatius Ajuru University of Education, Rumuoluemini, Rivers State, Nigeria 0000-0003-3691-3891 Panumart Sawangtong Research group for fractional calculus theory and applications, Science and Technology Research Institute, King Mongkut’s University of Technology North Bangkok, Bangkok, Thailand 0000-0003-0605-0044 Journal Article 2024 03 30 In this paper, we study the quantum dynamic of the Klein-Gordon particles/antiparticles with generalized Deng-Fan potential. We determine the energy spectra and the corresponding wave function expressed in terms of confluent Heun function using the extended Nikiforov Uvarov method. The influence of the potential parameters on the energy spectra is discussed in details.