A long afterglow luminescent material of the formula aMO.bM' (S.sub..beta.Se.sub.1-.beta.).cAl.sub.2O.sub.3.d B.sub.2O.sub.3.eP.sub.2O.sub.5: xEu.yLn, wherein M is/are selected from Sr, Ca, Ba, and Mg, and any combinations thereof; M' is/are selected from Sr, Ca, and Ba, and any combinations thereof; Ln is/are selected from Nd, Dy, Ho, Tm, La, Ce, Er, Pr, Bi, and Sm, and any combinations thereof; a, b, c, d, e, x and y are mole ratios, wherein 0.5

 
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> Near-infrared absorbing fiber comprising tungsten oxide, and fiber article using same
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