先前本實驗室發展出了以氯化鋅和氫氧化鈉於乙二醇中合成出奈米氧化鋅的方法。接著錢皇賓等人則將以此法合成出的奈米氧化鋅，參雜鋁之後，再製作透明導電膜。我則延續錢皇賓過去的做法，改變溶劑的組成後，嘗試各種塗佈的方法。整個研究大致分成兩個部份 PART I 過去錢皇賓學習M. Hilgendorff等人[1]以AZO粒子溶膠鍍膜的方法，他們先做出多孔隙的AZO薄膜，再浸入含AZO奈米粒子的溶劑中，讓這些奈米粒子藉由擴散的方法進入孔隙，將孔隙給填補起來。我延續了此一概念，先於低溫下(60℃)製做出多孔隙的氧化鋅薄膜後，再將此片薄膜放入含有[Zn]=0.1、[DMAB]=0.1的溶液中以60℃加熱四個小時，直接於孔隙中還原沉積出氧化鋅。將薄膜做的較為緻密後，再於氮氣氣氛下以500℃鍛燒兩個小時。發現無電鍍四小時後，會先得到一片片電阻為3.13x105Ω/□、電阻率為15.6Ωcm的薄膜，若先以500℃鍛燒兩個小時後，再以550℃通入Ar/H2(95/5)的氣體於0.3torr的壓力下，處理30分鐘後，可以得到片電阻為1048Ω/□、電阻率降為0.05Ωcm的薄膜。經由這樣處理的薄膜，平均總穿透率約為74.06%，平均霧度約為37.4%。是一具有高散射的薄膜。 PART II 第二個部份是將AZO粒子分散在適當的溶劑中，並調整溶劑的黏度表面張力等，將溶劑的Z值調整至9.57，並使用EPSON R290噴墨印表機噴印出寬約100μm的線條。噴印完後再使用無電鍍的方法，在線條上沉積出氧化鋅。由SEM看出來薄膜的厚度約為350nm，上半部150nm為柱狀結構的氧化鋅，下半部200nm則為粒子所堆積而成的薄膜。在未經過任何熱處理的情況下，可以得到一片電阻率約為1700Ωcm。在550nm的地方也可以達到90%之穿透率。 Previously, our laboratory successfully synthesized highly concentration AZO solution. And used this solution to produced a transparent conductive oxide thin film. But this process was too wasted time, we needed repeatedly to Infiltrate the film into AZO solution and annealed at high temperature to burned the organic . so I tried to simplify this process. At first, we used dip-coating method to make a gel film and then used DI-water at 60℃to washed the ethane glycol. After washed the film, which will became a porous structure. And then we could deposited ZnO into the porous by chemical deposition followed by electrochemical growth in 0.1M zinc nitrate aqueous solutions containing 0.1M DMAB at 333 K for 4hr to filled the porous. After filled the porous, we will anneal at 500℃ for 2hr to burned out the organic. And then annealed at 300~500℃ under a hydrogen atmosphere at 0.3torr pressure for 30min. The increase in annealing temperature gave a decrease in resistivity and an increase in carrier concentration and mobility and grain size. At 500℃ hydrogen annealed, the resistivity of the ZnO:H films achieves 0.04Ωcm and carrer concentration and mobility was 2.18x1019 cm3 and 6.84 cm2 V-1 s-1.It is also found that ZnO film has a scale like surface so it has a high light scattering in the visible range. In addition, we also try to control the AZO solution viscosity and surface tension to make the ink could used at EPSON printer. We success use this ink to printing straight line with width 100μm and a 4x2cm rectangular. After printing, we also use 60℃ DI-water to wash the straight line or the rectangular to make a porous structure. And then we also use electroless deposition process under the 0.1M Zinc nitrate and 0.1M DMAB aqueous solution. We use SEM and 4 point probe to observe the crystal morphology and conductivity. The ZnO crystals are grown in the printing film and it has a rod-type crystal structure. The transparent at 550nm are about 90% and the conductice are 1700 Ωcm
