Remarkable visible-light activated photostriction in Bi0.5(Na0.77K0.18Li0.05)0.5TiO3–Sr(Nb0.5Ni0.5)O3 relaxor ferroelectrics

Fe3+‐ and Nb5+‐Substituted Na0.5Bi0.5TiO3: A Route toward Enhanced Ferroelectric Photovoltaic Response in Al/NBFNT/Ag Solar Cell through Reduced Bandgap and Controlled Oxygen Vacancy

“…[15] Moreover, Ren et al have pointed out that room temperature photostriction in Bi 0.5 (Na 0.77 K 0.18 Li 0.05 ) 0.5 TiO 3 -Sr(Nb 0.5 Ni 0.5 ) O 3 and 0.95Bi 0.5 (Na 0.18 K 0.19 ) 0.5 TiO 3 -0.05Ba(Ti 0.5 Ni 0.5 )O 3-δ provides great potential application in optoelectronics. [16,17] Recent research has reported that the introduction of transition metal elements into the B-site of NBT perovskite can significantly reduce the bandgap because transition elements have ionic bonds and more covalent bonds with oxygen. [18] Previous studies have shown that the reduction of bandgap and B-site doping of transition metals such as Co 3þ , Ni 2þ , Fe 3þ , Nb 5þ , and Mn 2þ can efficiently tune the bandgap.…”