Monoetanolamin Miktarının ZnO İnce Filmlerin Kristallenmesi Üzerine Etkisi

Çinko oksit yarıiletkeni sahip olduğu değiştirilebilir yasak enerji aralığı ve görünür ışık bölgesindeki yüksek optik geçirgenliğinden dolayı opto-elektronik uygulamalar için çok sık kullanılan yarıiletkenlerden biridir. Farklı miktarlarda kullanılan monoethanolamin miktarının ZnO ince filmlerin yapısal, morfolojik ve optik özellikleri üzerine etkileri bu çalışmada incelenmiştir. Nano-fiber yapılı ZnO ince filmler başka herhangi bir işlem gerektirmeden cam altlık üzerine, basit sol-jel daldırma yöntemi kullanılarak sentezlenmiştir. Monoetanolamin miktarı artırıldığında örneklerin XRD pik şiddetlerinin arttığı ve kristal kusurlarının azaldığı gözlemlenmiştir. Bunun yanında, monoetanolamin miktarı arttığında mikro-fiber ZnO taneciklerinin altlık yüzeyini oldukça yoğun bir şekilde kapladığı görünmüştür. Ayrıca optik ölçümler sonucu stabilizer olarak kullanılan monoethanolamin miktarının artışı ile ince filmlerin görünür ışık bölgesindeki geçirgenliğinin arttığı görülmüştür.

Anahtar Kelimeler:

ZnO, Sol-jel metodu, Fotoluminesans, İnce filmler, Opto-elektronik

Effect of Monoethanolamine Content on the Crystallinity of ZnO Thin Films

ZnO is one of the most widely used semiconductors for opto-electronic applications due to its tunable band gap energy, high optical transparency in visible region. The effect of different monoethanolamine (MEA) ratio on structural, morphological and optical properties of ZnO thin films was investigated in this study. A nano-fiber like structured ZnO was fabricated through facile sol-gel dip coating process on glass substrates without any further treatment. We observed that the peak intensity of samples increased and the amount of defects in the crystal could be further decreased by rising its of monoethanolamine. Besides, the micro-fiber like grains of the ZnO covered the glass surface quite densely when the monoethanolamine content increased. The optical study showed that the transparency of the films could be enhanced by increasing the amount of stabilizer.

Keywords:

ZnO, Thin films, Sol-gel method, Photoluminescence, Opto-electronic,

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