碩士 / 國立交通大學 / 照明與能源光電研究所 / 104 / Solid-state light-emitting electrochemical cells (LECs) have received intense scientific attention since they show advantages of simple device structure, low-voltage operation and compatibility with air-stable electrode metals. To further improve device performance, enhanced electroluminescence (EL) from localized surface plasmon (SP) resonance in LECs incorporating gold nanourchins (NUs) at the anode is demonstrated. With gold NUs, peak device efficiency of thinner LECs (140 nm) can be enhanced by 35%. However, gold NUs result in no enhancement in EL for thicker LECs (200 nm) since recombination zone in thicker LECs is located outside the near-field range from gold NUs. Therefore, choosing proper emissive-layer thickness would be critical to realize plasmonic enhancement in EL from LECs. Furthermore, EL loss due to exciton quenching in thinner LECs can be recovered by plasmonic enhancement in EL from gold NUs. Compared to thicker LECs, up to 73% enhancement in peak light output can be achieved in thinner LECs and the device efficiency remains similarly high. Higher light output and device efficiency can be simultaneously realized in thinner LECs incorporating gold NUs. These results reveal that incorporation of gold NUs at the anode would be a simple and feasible way to improve device performance of LECs.
| Identifer | oai:union.ndltd.org:TW/104NCTU5399017 |
| Date | January 2016 |
| Creators | Shih,Hsien-Chang, 施憲璋 |
| Contributors | Su,Hai-Ching, 蘇海清 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 60 |
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