Photoluminescence optimization of BCNO phosphors synthesized using citric acid as a carbon source

A red emitting of manganese-doped boron carbon oxynitride (BCNO) phosphor materials: facile approach and photoluminescence properties

“…73-2095), is shown by the characteristic peak centered at 27 and 43 , belonging to (002) and (10) (unresolved (100) and (101) planes for h-BN), respectively. 14,15 This result indicates that BCNO was successfully synthesized via the solid state phase method. The t-BN on BCNO:Mn may have originated from the exothermic reaction of urea with boric acid or B 2 O 3 with NH 3 .…”

“…Preparation of BCNO from citric acid, boric acid and urea via a solid-state phase method has been reported; it exhibits blue photoluminescence under UV excitation. 14,15 Herein, by adding manganese(II) sulfate monohydrate, with 0.18% to 2.84% Mn/B ratios (denoted as BCNO:Mn B-G) at various synthesis temperatures, the BCNO:Mn exhibited strong red photoluminescence under 365 nm UV lamp excitation, as shown in Fig. 1.…”

“…The diffraction peaks of BCNO:Mn D indicate the existence of B 2 O 3 and BN phases, which is similar to previous reports. 14,15,20 The B 2 O 3 is shown by a characteristic peak centered at 14.7 , whereas 27.8 belongs to the (111) and (310) of cubic B 2 O 3 (JCPDS card no. 06-0297), respectively.…”

“…06-0297), respectively. 14,15,20 The BN phase, which corresponds to turbostratic BN (t-BN) (JCPDS card no. 73-2095), is shown by the characteristic peak centered at 27 and 43 , belonging to (002) and (10) (unresolved (100) and (101) planes for h-BN), respectively.…”

“…The red emission peak was shied toward shorter wavelengths with increasing temperature, which may have been related to changing C/B or C/N content. 2,14,20 However, further investigation is still needed. The red emission peak for BCNO:Mn synthesized at 500-600 C showed a predominant red emission, while starting from 650 C, the blue emission became predominant, indicating not only the Mn concentration but also the synthesis temperature plays an important role in the red luminescence of the BCNO phosphor.…”