A series of blue-emitting phosphor Sr3-xEuxAl10SiO20 (x=0-0.025, insteps of 0.0025) have been synthesized and the emission intensity is found to be maximum for x=0.02. The effect of boron substitution in the Al site in Sr3Al10SiO20:Eu2+ phosphor has been investigated to improve the blue emission of Eu2+. A series of boron-substituted compositions have been made Sr2.979Eu0.021Al10-xB xSiO20 (x=0, 0.25, 0.5, 0.75 and 1) and studied their photoluminescence (PL) property under UV and VUV excitation. The X-ray diffraction patterns of Sr2.979Eu0.021Al10-xB xSiO20 (x=0, 0.25, 0.5, 0.75 and 1) show single phase formation and all the compositions crystallize in monoclinic structure with space group C2/m. Blue emission (due to Eu2+ion) has been found in all compositions and the emission intensity is found to be maximum for x=0.25 and it is ∼2 times higher than that of x=0 composition (PL intensity 62% vs. commercial BAM). Hence, this phosphor could be possible potential candidate for blue light-emitting phosphor for plasma display panel (PDP) applications. © 2009 Elsevier B.V. All rights reserved.