利用化學浴沉積法成長氧化鋅薄膜製成高效率反結構有機太陽能電池

本論文主要將化學浴沉積法(Chemical Bath Deposition；CBD)應用於反式結構有機太陽能電池上，化學浴沉積法不但簡單環保，並且符合未來有機太陽能電池可撓性與大面積的發展趨勢。本研究使用P3HT(Poly (3-hexylthiophene-2,5-diyl))混合PCBM (1-(3-methoxycarbonyl) propyl-1-phenyl[6,6]-C61)製成塊材異質接面作為主動層；因為氧化鋅抗水氧能力強，並且具有良好的載子傳輸能力，故電子傳輸層(Electron Selective Layer)選用氧化鋅(Zinc oxide；ZnO)薄膜。過去在有機太陽能電池的領域中，沉積氧化鋅薄膜的相關研究有使用原子層沉積方式(atomic layer deposition；ALD)、旋轉塗佈方式(spin coating) 、噴墨塗佈(spray coating)或者sol-gel方式等等，本實驗則是應用化學浴沉積法製作表面平整及組織緻密之奈米級ZnO電子傳輸層，元件結構為ITO/ZnO/P3HT:PCBM/PEDOT/Ag的反式有機太陽能電池。實驗上先討論不同厚度的CBD-ZnO薄膜對元件效率的影響，以80nm的ZnO薄膜經過高溫退火後的最佳元件可以達到3.93%的轉換效率，之後再透過持續照光的方式，進一步讓元件最高效率達到4.61%。接著討論不同退火處理對CBD-ZnO薄膜的影響，實驗最後以快速熱退火取代長時間高溫退火，使元件未來可以製作在軟板上。本論文證實了在未來有機太陽能製程中，可以運用CBD技術成膜ZnO，大量製作大面積的有機太陽能電池。

關鍵字

反結構；氧化鋅；化學浴沉積法；有機太陽能電池

並列摘要

Zinc Oxide (ZnO) has received high attention because of its high mobility and air-stable, which makes it attractive for use in inverted organic solar cells. Many research groups reported that ZnO thin films were prepared by atomic layer deposition (ALD), spin-coating, sputtering, and spray-coating etc. Using Chemical bath deposition to fabricate Zinc oxide as electron selective layer in organic solar cells is a novel technique. The Chemical bath deposition with potential advantages of enabling a large-area coating, low-cost and low-temperature can overcome the drawbacks of other processes. In this work, ZnO thin films used as electron selective layer were successfully deposited on glass/ITO substrates by the method of chemical bath deposition in organic solar cells. The devices exhibit a PCE of 3.93% with optimum film thickness and annealing temperature, and achieved 4.61% after electrode treatment.

並列關鍵字

Inverted organic solar cell ； ZnO ； Chemical bath deposition

參考文獻

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利用化學浴沉積法成長氧化鋅薄膜製成高效率反結構有機太陽能電池

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