製作三極平面及管型場發射發光元件與探討螢光粉在場發射陽極之影響

本論文研究的第一部份為利用三氧化二鐵(α-Fe2O3)製作三極平面場發射元件，第二部分為利用奈米碳管(CNTs)製作三極管型場發射元件，第三部份為利用不同溶液對螢光粉改質，測試二氧化矽(SiO2)分散液與氧化銦錫(ITO)溶液對螢光粉之影響。我們建立一標準化製作及量測流程，將鐵粉網印製作三極平面場發射元件及奈米碳管製作三極管型場發射元件。第一部分首先將鐵粉網印在陰極電極上，進行熱氧化反應，成長出海膽狀三氧化二鐵(Urchin-like α-Fe2O3)，量測整體元件電壓、電流以及長時間下輝度關係並且作圖分析，根據實驗的結果可得到當陽極電壓為4 kV、閘極電壓為500 V時，最高輝度為8327 cd/m2、均勻度為92.41 %、場發射因子β為13680，達到一高亮度且高均勻性的平面光源。第二部份使用奈米碳管作為場發射源，並將陰/閘極電極網印在管型玻璃管上，將玻璃管放入螢光粉玻璃管內，製作管型場發射光源，接著量測整體元件亮度、電流並分析。根據實驗結果提出其改良方式並期望未來能夠作為照明光源的應用。第三部分將螢光粉網印在氧化銦錫玻璃上後，對螢光粉作後處理，發現滴入SiO2分散液能有效提升螢光粉壽命，在CL壽命量測測試三小時後衰退亮度從未處理之螢光粉的18.5 %提升到10.8 %，但有碳累積與起始亮度低等問題，而滴入ITO溶液雖無法減少螢光粉亮度衰退，但測試後碳累積程度明顯下降。

關鍵字

螢光粉；圓管；側向三極；場發射；網印；三氧化二鐵

並列摘要

This study is divided into three parts. The first part is the use of urchin-like α-Fe2O3 to be the emitter for a triode flat plane field emission device. Field emission characteristics of α-Fe2O3 were studied such as luminance, uniformity, lifetime, I-V curve and field enhancement factor. With 4 kV of anode voltage and 500 V of gate voltage, field enhancement factor measured was 13680, the luminance of the device was 8327 cd/m2 and uniformity was 92.41 %. The second part is the use of CNTs to be the emitter for a triode tube field emission device. I-V curves and luminance were analyzed. The study shows promising results for further research. The third part is the study of phosphor in field emission anode. SiO2 dispersion or ITO solution were used into phosphor. SiO2 dispersion can enhance lifetime of phosphor. After three hours of test, the brightness decay was from non-treated ~18 % to ~10 %. But the initial brightness was lower then non-treated sample. ITO solution can reduced the deposition of carbon.

並列關鍵字

Phosphor ； Tube ； Screen printing ； Lateral triode ； Field emission ； Fe2O3

參考文獻

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[3] Chen SJ, Youh MJ, Huang LH, Tseng CL, Hsu CY, Li YY. Fabrication of Double-Sided Field-Emission Light Source Using Urchin-Like alpha-Fe2O3 Microparticles. IEEE Trans Electron Devices. 2014;61(3):820-4.

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製作三極平面及管型場發射發光元件與探討螢光粉在場發射陽極之影響

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