Nitrogen-Ion Implantation Induced Bandgap Tailoring in Multifunctional Brownmillerite KBiFe2O5 Sankar Vavilapalli, Durga ; Banik, Soma ; Kandasami, Asokan ; Ramachandra Rao, M. S. ; Singh, Shubra Abstract Publication: Journal of Solid State Science and Technology Pub Date: June 2021 DOI: 10.1149/2162-8777/ac0839 Bibcode: 2021JSSST..10f1010S