發光二極體是現今主流取代傳統光源的方案之一,其中有機鈣鈦礦發光元件,是轟動的新穎材料,這是十分有前瞻性的光電材料。典型的混合式有機-無機CH3NH3PbI3,在太陽能電池效率上,有著顯著的效率表現,光電轉換效率高達20%以上,這樣優異的光電轉換性質,讓鈣鈦礦系列材料受到關注。鈣鈦礦材料擁有獨特的光電特性,因此衍生出許多研究方向,其中發光二極體也是重要的研究主體。 本論文針對無機-無機CsPbX3之鈣鈦礦材料用於發光二極體之發光層與元件結構進行研究與討論。我們研究無機鈣鈦礦薄膜材料的製程,並使其發光。另外我們也使用膠體溶液化學法,進行大量且短時間內合成無機鈣鈦礦奈米顆粒的研究。我們利用X光繞射儀、電子顯微鏡( SEM、TEM )、光激發螢光光譜及吸收光譜鑑定鈣鈦礦奈米顆粒與薄膜材料特性。並且進一步應用到本研究的雙層鈣鈦礦發光元件的結構,亦即以CsPbI3薄膜與CsPbBr3奈米顆粒薄膜,為主要發光材料,並且能通時發出各自獨立的光色,進一步實踐電激發光的混光元件,未來有機會以這樣的解構實踐所謂的白光發光元件。
Perovskite materials have demonstrate high power conversion ef-ficiency (> 20%) in the field of solar cells. In addition, recently, per-ovskite materials were also used for light-emitting diodes, which are important solid-state lighting device. In this work, thin film and quantum dots based on CsPbX3 were prepared and the optoelectronic characteristics of quantum dots were also investigated by using X-ray diffraction, scanning electron microscope, tunneling electron micro-scope, photoluminescence spectra and absorption spectra. We further use CsPbX3 thin film and quantum dots to realize light-emitting diodes.