比較有機發光二極體不同電特性理論模型與溫度效應

Compare Organic Light-Emitting Diode Electrical Characteristics of Different Theoretical Models and Temperature Effects

張福城(Fu-Cheng Zhang)

指導教授 ： 莊賦祥

共同指導教授 ： 蔡裕勝

國立虎尾科技大學/電機資訊學院/光電與材料科技研究所在職專班/碩士(2011年)

摘要

1.本篇研究報告以注入限制電流公式(Injection-charge-limited-current,以下簡稱ICLC)和塊積限制電流公式(Bulk-limited-current,以下簡稱BLC)混合，再運用Matlab軟體對有機發光二極體(以下簡稱OLED)元件進行電特性模擬分析，並和空間電荷限制電流公式(Space-charge-limited-current,以下簡稱SCLC)的模擬值做比較，進一步分析，哪一種公式更適合運用於OLED的模擬。
2.在NPB單層元件，操作電壓為7伏特，(ICLC+BLC)與實驗值的平均吻合度為96.3%，而SCLC與實驗值的平均吻合度為90%。在電壓小於4.5伏特，(ICLC+BLC)比SCLC更貼近實驗值。
3.在Alq3單層元件，操作電壓為10伏特，(ICLC+BLC)與實驗值的平均吻合度為96.32%，而SCLC與實驗值的平均吻合度為96.34%。在電壓小於4.5伏特，(ICLC+BLC)比SCLC更貼近實驗值。
4.在雙層元件，NPB厚度30nm，Alq3厚度60nm，操作電壓為8.伏特，(ICLC+BLC)與實驗值的平均吻合度為97.2%，而SCLC與實驗值的平均吻合度為97.8%。在低電壓，(ICLC+BLC)比SCLC更貼近實驗值。
5.OLED厚度增加，而電流密度減少，由(ICLC+BLC)與SCLC模擬結果得知，電洞流是影響總電流的主要因素，整體而言，(ICLC+BLC)比SCLC的模擬效果更符合OLED的特性。

關鍵字

注入限制電流 ； 塊積限制電流 ； 空間電荷限制電流 ； 電洞流 ； 電子流

並列摘要

1.This paper mixed the Injection-charge-limited-current formula and the Bulk-limited-current formula simulate the electrical characteristics of OLED.
Then the formula and space charge limited current analog value for comparison, further analysis, which used a formula more suitable for OLED simulation.
2. Single component in the NPB, the operating voltage of 7 volts, (ICLC + BLC) consistent with the experimental value of the average degree of 96.3%, while the SCLC and the average degree of matching the experimental value of 90%. In the low-voltage, (ICLC + BLC) closer to the experimental value than SCLC.
3. Components in the Alq3 layer, the operating voltage of 10 volts, (ICLC + BLC) consistent with the experimental value of the average degree of 96.32%, while the SCLC and the average degree of matching the experimental value of 96.34%. In the low-voltage, (ICLC + BLC) closer to the experimental value than SCLC
Formula with the space charge limited current analog value for comparison, further analysis, which used a formula more suitable for OLED simulation..
4. In the double-layer components, NPB thickness of 30nm, Alq3 thickness of 60nm, operating voltage of 8 V, (ICLC + BLC) consistent with the experimental value of the average degree of 97.2%, while the SCLC and the average experimental value of the degree of matching was 97.8%. In the low-voltage, (ICLC + BLC) closer to the experimental value than SCLC.
5. Current density increases with the thickness of the OLED is reduced by (ICLC + BLC) and SCLC simulation results revealed that the hole flow is the main factor affecting the total current, overall, (ICLC + BLC) is more effective than the simulation of SCLC in line with the characteristics of OLED.

並列關鍵字

the electron flow ； the hole flow ； injection limited current space charge limited current ； bulk limited current

參考文獻

[1] M. Pope, H. Kallmann, and P., J. Chem. Phys. 38 2042 (1963).

[2] C. W. Tang, and S. A. VanSlyke, Appl. Phys. Lett. 51 913 (1987).

[8] S. A. VanSlyke, C. H. Chen, and C. W. Tang, Appl. Phys. Lett. 69 2160 (1996).

[13] S. M. Sez, Physics of Semiconductor Device, Wiley New York, (1981).

[14] J. Park, and Y. Kawakami, “Temperature-Dependent Dynamic Behaviors of Organic Light-Emitting Diode”, (2006)