A review: X‐ray excited luminescence of gadolinium based optoelectronic phosphors

Abstract X‐ray excited fluorescence tomography is an emerging field in the application of bio‐imaging and computer tomography. Some rare‐earth doped inorganic phosphors like gadolinium oxide (Gd 2 O 3 ), yttrium oxide (Y 2 O 3 ), zinc tungstate (ZnWO 4 ), cesium fluoride (CsF), barium fluorochloride (BaFCl), lanthanum oxybromide (LaOBr) are shown outstanding applications for X‐ray excited phosphors. Gadolinium (Gd)‐based inorganic phosphors show extraordinary applications in the field of X‐ray chromatography and computer chromatography. In this review article, we discussed the general information about X‐ray excited luminescence (XEL) phosphor. Further, we discussed importance, synthesis, structural and photoluminescence (PL) properties of rare‐earth (Europium (Eu)) doped Gd 2 O 3 . To elaborate the scope of the review, we have discussed synthesis, structural and optical properties of lithium (Li) doped Gd 2 O 3 :Eu. At the end of the review, synthesis, structural and optical properties of Eu doped lutetium oxide (Lu 2 O 3 ) have been discussed and the results compared with Eu doped Gd 2 O 3 . The comparison provided the understanding of structural and optical peak position of host and the dopant (Eu).