本文選題：近紅外量子剪裁　切入點(diǎn)：鉺離子發(fā)光　出處：《光譜學(xué)與光譜分析》2017年08期 　論文類型：期刊論文

【摘要】：研究了摻鉺的氟氧化物玻璃陶瓷的雙光子、三光子與四光子近紅外量子剪裁發(fā)光。我們測(cè)量了摻鉺的氟氧化物玻璃陶瓷的X射線衍射譜、吸收譜、從可見到近紅外的發(fā)光光譜與激發(fā)光譜。當(dāng)Er3+濃度從0.5%增加到2.0%,發(fā)現(xiàn)鉺離子的~4I_(15/2)→~2G_(7/2),~4I_(15/2)→~4G_(9/2),~4I_(15/2)→~4G_(11/2),~4I_(15/2)→~2H_(9/2),~4I_(15/2)→(~4F_(3/2),~4F_(5/2)),~4I_(15/2)→~4F_(7/2),~4I_(15/2)→2 H11/2,~4I_(15/2)→~4 S_(3/2) ,~4I_(15/2)→~4F_(9/2),與~4I_(15/2)→~4I_(9/2)紅外激發(fā)譜峰的強(qiáng)度增加了大約5.64,4.26,2.77,7.31,6.76,4.75,2.40,11.14,2.88,和4.61倍,同時(shí),鉺離子的~4I_(15/2)→~2G_(7/2),~4I_(15/2)→4 G9/2,~4I_(15/2)→4 G11/2,~4I_(15/2)→2 H9/2,~4I_(15/2)→(~4F_(3/2),~4F_(5/2)),與~4I_(15/2)→~4F_(7/2)的可見激發(fā)譜峰的強(qiáng)度減小了1.36,1.93,3.43,1.01,2.24和2.28倍。也就是說我們發(fā)現(xiàn)紅外發(fā)光與激發(fā)的強(qiáng)度都增強(qiáng)了2~11倍,與此相伴的可見的發(fā)光與激發(fā)強(qiáng)度都減小了一到三倍。而且,1 543.0與550.0nm發(fā)光的激發(fā)譜不僅在峰值波長(zhǎng)而且也在波峰形狀上非常相近。上述實(shí)驗(yàn)結(jié)果證實(shí)了所看到的現(xiàn)象為多光子近紅外量子剪裁發(fā)光現(xiàn)象。為了更好的分析量子剪裁的過程與機(jī)理,還測(cè)量了主要的可見與紅外發(fā)光強(qiáng)度隨激發(fā)強(qiáng)度的改變;發(fā)現(xiàn)所有可見和紅外發(fā)光強(qiáng)度都基本上是隨激發(fā)強(qiáng)度成線性變化關(guān)系;其中,可見的發(fā)光強(qiáng)度隨激發(fā)強(qiáng)度的改變呈略大于線形一次冪的變化關(guān)系,它是由于小的激發(fā)態(tài)吸收造成的;而1 543.0nm紅外發(fā)光強(qiáng)度隨激發(fā)強(qiáng)度的變化呈略小于線形一次冪的變化關(guān)系,它即是量子剪裁發(fā)光的特征現(xiàn)象。還發(fā)現(xiàn)~4I_(9/2)能級(jí)的雙光子量子剪裁主要由{~4I_(9/2)→4 I_(13/2),~4I_(15/2)→~4I_(13/2)}ET~(r31)-ET~(a01)交叉能量傳遞所導(dǎo)致;~4 S_(3/2) 能級(jí)的三光子量子剪裁主要由{~4 S_(3/2) →~4I_(9/2),~4I_(15/2)→~4I_(13/2)}ETr53-ETa01和{~4I_(9/2)→~4I_(13/2),~4I_(15/2)→~4I_(13/2)}ET~(r31)-ET~(a01)交叉能量傳遞所導(dǎo)致;~2H_(9/2)能級(jí)的四光子量子剪裁主要由{2 H9/2→~4I_(13/2),~4I_(15/2)→~4 S_(3/2) }ETr91-ETa05,{~4 S_(3/2) →~4I_(9/2),~4I_(15/2)→~4 I_(13/2)}ET~(r53)-ET~(a01)和{~4I_(9/2)→~4I_(13/2),~4I_(15/2)→~4I_(13/2)}ET~(r31)-ET~(a01)交叉能量傳遞所導(dǎo)致。上述研究結(jié)果對(duì)目前的全球熱點(diǎn)新一代量子剪裁太陽能電池很有價(jià)值。
[Abstract]:The two-photon, three-photon and four-photon near-infrared quantum-clipping luminescence of erbium-doped fluorooxide glass ceramics has been studied. The X-ray diffraction spectra and absorption spectra of erbium-doped fluoride oxide glass ceramics have been measured. From the visible near infrared luminescence and excitation spectra, when the concentration of Er3 was increased from 0.5% to 2.0, the Erbium ion was found to be 15 / 2 of Erbium ion. 鈫，

本文編號(hào)：1610003