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。

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.

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