supported by the National Natural Science Foundation of China(Grant Nos.21301023,11204024,and 11474046);Program for New Century Excellent Talents in University(Grant No.NCET-13-0702);Science and Technology Project of Liaoning Province(Grant No.2012222009);Natural Science Foundation of Liaoning Province(Grant No.20170540200);Fundamental Research Funds for the Central Universities(Grant Nos.DC201502080302,DC201502080406,DC201502080203,DCPY2016009,and DCPY2016026);Technology Foundation for Selected Overseas Chinese Scholar,Ministry of Human Resources and Social Security of the People’s Republic of China
Long-lasting phosphorescent (LLP) materials have attracted considerable attention since green and blue emitting persis- tent Eu2+ doped alkaline earth phosphors were reported in the mid-1990s [1-3]. Over the past f...