聚(3-己烷基噻吩)及其共聚物/碳六十衍生物混摻材料應用於光電壓電池元件之特性研究

Studies on the Application and Characteristics of Poly(3-hexylthiophene) and its Copolymers /Fullerene Materials on Photovoltaic Cell

李昌鴻(Chang-Hung Lee)

指導教授 ： 郭欽湊

大同大學/工程學院/化學工程學系所/碩士(2008年)

摘要

本研究主要以聚(3-己烷基噻吩) (Poly(3-hexylthiophene)；P3HT)及其共聚物和PCBM混鍊材料應用於光電壓電池元件之研究，藉由改變退火溫度、摻混的比例及退火時間的處理，使有機主動層能有秩序性的分子排列，進而提升光電轉換效率，並探討以能階與吸收光譜的強度來分析材質轉換效率的特性。
以P3HT 及PCBM 混摻物為主動層時探討其重量比例混摻之元件特性的影響，將P3HT與PCBM 以1:1 重量比摻混，若未作退火處理，其元件效率約為0.08%，於150 ℃下退火處理15、20分鐘分別比較特性，發現光電效率為0.42%至0.46%間。另外P3HT、PCBM 以1:0.8 重量比摻混，於100 ℃、150 ℃、180 ℃及200 ℃各退火20分鐘，發現最適當的退火溫度為150 ℃，短路電流密度、開環電壓、填充因子、光電轉換率分別為1.88 mA/cm2、0.4 V、0.46、0.86%，最後將P3HT、PCBM 以3:1 重量比摻混，結果發現150 ℃下退火10分鐘其短路電流、開環電壓、填充因子、光電轉換率分別為4.3 mA/cm2、0.45 V、0.35、1.12%。
另一方面以吾研究室所合成的噻吩共聚物聚(3-己烷基噻吩-共-十二烷基噻吩)(poly(hexylthiophene-co-dodecylthiophene);P3HTDDT)為電子施體和PCBM以1:0.8 重量比摻混之元件以100 ℃退火15分鐘可得短路電流密度為0.135 mA/cm2，開環電壓為0.61 V，光電轉換率0.65%，噻吩共聚物聚(3-己烷基噻吩-共-癸烷基噻吩) P3HTDT(poly(hexylthiophene-co-decylthiophene))和PCBM以1:0.8 重量比摻混之太陽能電池125 ℃退火10分鐘可得光電轉換效率0.14%。

關鍵字

短路電流 ； 光電轉換效率 ； 聚(3-己烷基噻吩-共-十二烷基噻吩)共聚物 ； 聚(3-己烷基噻吩) ； 開環電壓 ； 填充因子

並列摘要

In this study, the application and characteristics of photovoltaic cell fabricated with poly(3-hexylthiophene (P3HT) and its copolymers blending with (6,6)-phenyl-C61-butyric acid methyl ester (PCBM) have been investigated. Studies on the enhancement for power conversion efficiency of photovoltaic cell for the influence of the annealing temperature, annealing time, and weight ratio of P3HT/PCBM have been carried out. To analysis the characteristics of the power conversion efficiency, studies on the energy band and the strength of absorption spectra have been investigated.
The power conversion efficiency of the photovoltaic cell fabricatd with P3HT/PCBM (1:1) subjected to heat treatment at 150 ℃ for 15 or 20 min is about 0.42% ~ 0.46%, which are larger than that (0.08%) of the original device (without annealing).
The characteristics of the photovoltaic cell fabricatd with P3HT/PCBM (1:0.8) subjected to heat treatment at 100, 150, 180, and 200 ℃ for 20 min have been invertigated. The short-circuit current density, open-circuit voltage, fill factor, and efficiency of device subjected to heat trement at 150 ℃ are 1.88 mA/cm2, 0.4 V, 0.46, and 0.86%, respectively. The short-circuit current density, open-circuit voltage, fill factor, and power conversion efficiency of the photovoltaic cell with P3HT/PCBM (of 3:1 weight ratio) subjected to heat treatment at 150 ℃ for 10 min are 4.3 mA/cm2, 0.35 ,and 1.12%, respectively.
On the other hand, the short-circuit current density, open-circuit voltage, and power efficiency of the photovoltaic cell fabricated with copoly(3-hexylthiophene-co-3-dodecylthiophene (P3HTDDT), which is synthesized by our laboratory, blending with PCBM subjected to heat treatment at 150 ℃ for 15 min are 0.135 mA/cm2, 0.61 V, and 0.65%, respectively.

並列關鍵字

open circuit voltage ； copoly(3-hexylthiophene-co-3-dodecylthiophene) ( ； poly(3-hexylthiophene) ； fill factor ； photovoltaic cell ； power conversion efficiency ； short circuit current

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