Realizing Near-UV Light Excitation of Mn2+ via Efficient Energy Transfer from Eu2+ for White LEDs

Publication date: Available online 20 January 2020Source: Materials Research BulletinAuthor(s): Quan Dong, Jiaojie Yang, Shengan He, Jun Cui, Fengli Yang, Jiaqing Peng, Fu Du, Shaohua Yang, Xinyu YeAbstractA series of Eu2+ and Mn2+ co-activated Al5O6N multi-color phosphors were fabricated through the gas-pressure sintering method, and they displayed intense blue-green emitting at near-ultraviolet irradiation due to efficient energy transfer. Dipole-dipole interaction was proved to be the leading role for Eu2+-Mn2+energy transfer and the highest energy transfer efficiency was obtained about 78%. Furthermore, tunable emissions from blue to green were observed through regulating the concentration of Eu2+ and Mn2+. In addition, the temperature-dependent luminescence behavior of Al5O6N:Eu2+, Mn2+ was examined, and the emission intensity at 150℃ maintains 82% of initial intensity, which indicates superior thermal stability. These outcomes illustrate that the Al5O6N: Eu2+,  Mn2+ phosphors may be potentially used in white LEDs.Graphical abstract
Source: Materials Research Bulletin - Category: Materials Science Source Type: research