【作者】 俞亚东； 黄晓春；

【机构】 汕头大学化学系；

【摘要】 白光发光二极管(WLEDs)由于其节能,小型化的优点在照明和成像上有广泛的应用,但目前商用的WLEDs大多由不同的磷光体混合来产生白光,但伴随着分散不均匀和热力学不稳定的问题,如何得到单一的磷光体直接发射白光,吸引了人们的兴趣1,2。如图Fig 1a我们合成了一例具有蜂窝型拓扑结构(hcb)的二维聚合物,发现它在高能激发时(例如254 nm)发射蓝光,CIE坐标为(0.18,0.16);而在低能激发时(例如365 nm)直接发射白光,CIE坐标为(0.24,0.30),落在白光区域(如图Fig 1b,1c)。更多还原

【Abstract】 White-light-emitting diodes(WLEDs) have broad applications in displays and lighting for the purpose of conserving energy and miniaturization of equipment. Commercially available WLEDs are most based on the multiphosphors with mixing problems, such as uniformly dispersing and thermodynamically unstable compositions and so on. One of the current academic interests is in the pursuing single white-light phosphors1, 2. Herein, we report a two-dimensional coordination polymer with hcb topology which show blue emission under high energy excitation(for example 254 nm), while directly emits white light under low energy excitation(for example 365 nm).更多还原