tailieunhanh - Red light emission of Mn doped beta-tricalcium phosphate -Ca3(PO4)2

This paper is the first report on the red light emission of manganese (Mn) doped beta-tricalcium phosphate ( - Ca3(PO4)2, TCP) synthesis by co-precipitation method followed by thermal annealing. The annealed Mn doped TCP phosphor showed dominant spheres with a diameter of about 500 nm. | Vietnam Journal of Chemistry, International Edition, 55(5): 633-637, 2017 DOI: Red light emission of Mn doped beta-tricalcium phosphate -Ca3(PO4)2 Hoang Nhu Van1, Bui Thi Hoan1,2, Nguyen Duy-Hung1, Phuong Dinh Tam1, Nguyen Thi Khoi1*, Cao Xuan Thang1, Pham Vuong-Hung1* 1 Advanced Institute for Science and Technology (AIST), Hanoi University of Science and Technology 2 Faculty of Energy Engineering, Hanoi Water Resource University Received 4 June 2017; Accepted for publication 20 October 2017 Abstract This paper is the first report on the red light emission of manganese (Mn) doped beta-tricalcium phosphate ( Ca3(PO4)2, TCP) synthesis by co-precipitation method followed by thermal annealing. The annealed Mn doped TCP phosphor showed dominant spheres with a diameter of about 500 nm. The influences of the Mn concentration, annealing temperature, and atmospheres on the photoluminescence intensities of the phosphors were investigated and the results indicate that the annealing temperatures and Mn concentrations are the main factors. The phosphor showed visible emission peaks appeared at about 660 nm and 580 nm results in from the 4T1-6A1 transitions within Mn2+ ion. The Mn-TCP phosphor may serve as a candidate for light-emitting diode application in agriculture lighting. Keywords. Hydroxyapatite; manganese; luminescence; tricalcium phosphate. 1. INTRODUCTION Along with hydroxyapatite (HA), beta-tricalcium phosphate ( -Ca3(PO4)2, (TCP) has received considerable attention as a host material in designing the light emission materials because of its biosafety, nontoxicity and easily incorporated a wide variety of substitutions for Ca2+ and PO43- based on flexibility of its structure [1, 2]. In order to enhance light emission of the device performance and its agriculture products, it is necessary to combine the advantages of environmental friendly properties with light emission [3, 4]. In particular, synthetic light source with deeply red .