Sorry I cannot type Chinese on this computer :P Rare earth (稀土) defects provide inter-gap levels in the original oxides, and the inter-gap levels allow PL appearing in the oxides So you can see PL in such oxides with rare earth defects If you use pure rare earth oxides, you will have simple band gaps without defects levels. Since there are no inter-gap defects levels in pure rare earth oxides, you cannot find out PL there :) Oxygen vacancies way distorts local electronic structures and Fermi level so they do affect on the PL ※ 引述《Supra (　)》之銘言： : 一般來說會將稀土元素摻雜到氧化物中造成發光 : 想請教一些問題 : 為何不直接用稀土氧化物發光?? : 另外 摻雜會用2+ 或3+表示 但是摻雜進去確實是這樣的狀態嗎??? : 有需要驗證它嗎??? : 像這種題目會去探討缺氧與否嗎??? : 以及做這方面的研究除了PL以外 大概需要做哪些量測分析??? : decay time??? -- 在達文西過世四個月後，麥哲倫展開了人類歷史上的首次環球航行。 --

※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 155.69.204.53