高效率可撓高分子太陽能電池製備於塑膠基板之研究

Study of High-efficiency Flexible Polymer Solar Cells Based on PET Substrates

蔡國華(Kao-Hua Tsai)

指導教授 ： 林清富

國立臺灣大學/電機資訊學院/電機工程學研究所/碩士(2009年)

https://doi.org/10.6342/NTU.2009.03304

摘要

有機共軛高分子太陽能電池具有低成本、低溫製程、可撓、容易大面積製造等等優點，近年來引起廣大的注意。而在此篇論文中，我們首先使用有機材料P3HT/PCBM來製作玻璃基板傳統型共軛高分子太陽能電池，並對其電洞傳導層PEDOT:PSS改質，使得PEDOT:PSS的導電率增加，因此而增進我們元件的效率。然而，因傳統型結構主動層需要高溫退火且PEDOT:PSS易侵蝕ITO的缺點，使其製作在可撓塑膠基板上的效率表現不佳，且傳統結構元件放置在空氣中其元件效率衰減很快。
因此我們又以反轉結構制作主動層不需退火處理的可撓塑膠基板太陽能電池，且以AFM觀察主動層表面結構隨著時間的變化以及對元件效率增加的影響，而這容易製作且主動層不需退火的反轉結構塑膠基板太陽能電池元件具有很高的效率(3.66%)，快可以比上以玻璃基板製作的元件效率。除此之外，我們還實驗新的有機材料Plexcore® PV2000來製作反轉結構塑膠基板太陽能電池，並得到了更高的效率(3.83%)。顯示此反轉結構太陽能電池除了製程簡單外還具備在大氣中的高穩定性，因此製作在可撓塑膠基板上具有很大的發展潛力。

關鍵字

塑膠基板 ； 高分子 ； 可撓太陽能電池 ； 混掺異質結構 ； 退火

並列摘要

Conjugated polymer-based organic solar cells have attracted considerable attention in recent years because they have many advantages, such as low-cost, processing with low temperature, flexibility, large area production and so on. In this study, we use poly(3-hexylthiophene) (P3HT) and [6,6]-phenyl-C61-butyric acid methyl ester (PCBM) to fabricate the conventional polymer solar cells on glasses. The hole conductive layer (PEDOT:PSS) is modified to increase its conductivity and improve the device performance. However, the conventional structure has the disadvantages of the high annealing temperature of the active layer and the etching reaction of the PEDOT:PSS with ITO. The efficiency of the conventional polymer solar cell on polyester (PET) is very low. Besides, the efficiency of the conventional polymer solar cell in air decreases very fast with time.
The inverted polymer solar cell on PET substrate with a non-annealing active layer is investigated. The atomic force microscope images show that the morphology of the non-annealing active layer of the inverted plastic solar cell evolves with time, which improves the performance of the solar cell. The easily processed inverted device with a non-annealing active layer on the indium-tin-oxide coated PET substrate exhibits a high power conversion efficiency of ~3.66%, which is comparable to the device on the glass substrate. Besides, we use the new materials Plexcore® PV2000 to fabricate the inverted polymer solar cells on PET and have a high power conversion efficiency of ~3.83%. The inverted structure has air-stable characteristics and can be processed easily, so it has the potential for polymer solar cells on PET substrates.

並列關鍵字

PET substrate ； polymer ； flexible solar cells ； bulk heterojunction structure ； anneal

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