| 초록 |
We have synthesized a series of new fluorene-based copolymers (PFPTRs) with varying molar ratios of the low energy band-gap comonomer, BPTR. These polymers were synthesized with the aim of creating pure red-emitting-materials for use in OLEDs as well as polymers that can form the basis of efficient white-light-emitting materials. An EL device fabricated with PFPTR 1 was found to emit nearly pure red light with CIE coordinates of (0.62, 0.36), which are very close to the standard red (0.66, 0.34) demanded by the National Television System Committee. Its maximum external quantum efficiency and maximum current efficiency were 2.3% and 1.70 cd/A at 10V, respectively. Moreover, devices based on PFPTR 01 and PFPTR 025 displayed white electroluminescence with CIE coordinates of (0.27, 0.40) and (0.41, 0.37), their maxima of current efficiency and external quantum efficiency are 1.84 and 1.21 cd/A, 0.87 and 1.06 % respectively, which appear near-white to the naked eye. |
