| Summary: | 碩士 === 國立臺灣海洋大學 === 光電科學研究所 === 103 === In first part of the thesis, we describe two novel blue emission materials based on phenanthroimidazole/carbarzole (PBC and PBnC). Phenanthroimidazole is a highly efficient violet-blue chromophore and used as core structures for deep blue emitter. OLEDs using PBC as emitting layer with an EQE of 6.6% and deep blue emission (CIEy < 0.06). By using transient electroluminescence measurements, the devices observed significant delayed fluorescence via triplet–triplet annihilation. The additional effect of extra singlet excitons form the basis for the improved EQE of 6.6% observed for the device.
In the second part, we study pragmatic white organic light emitting diodes (WOLED) incorporating a single organic component only. The dual, far separated monomer (451 nm) and excimer (540 nm) of Cz9PhAn make feasible the white light generation. Exploiting Cz9PhAn as the single emitter, a white organic light emitting diode (WOLED) was fabricated with a maximum external quantum efficiency of 3.6% at 1000 cd m-2 (4.2 V) with Commission Internationale de l’Eclairage (CIE) coordinates of (0.30, 0.33). This non-doped, single component WOLED significantly reduces the complexity of the fabrication process and hence renders a green and cost-effective alternative among the contemporary display/lighting technologies.
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