【摘要】：針對架橋生長的半導(dǎo)體型單壁碳納米管中激子的擴(kuò)散特性,建立激子的一維擴(kuò)散模型,進(jìn)而考察研究碳納米管中激子的擴(kuò)散及復(fù)合發(fā)光過程.通過求解激子的一維擴(kuò)散方程,模擬在有限長度下的碳管中激子密度、發(fā)光強(qiáng)度隨管長和激子擴(kuò)散長度之間的變化關(guān)系.研究結(jié)果表明,激子的擴(kuò)散長度對激子發(fā)光強(qiáng)度有著重要影響,較大的激子擴(kuò)散長度容易導(dǎo)致激子的邊界淬滅,降低發(fā)光強(qiáng)度和發(fā)光效率.研究結(jié)果不但有助于碳納米管中激子的擴(kuò)散長度的測量,而且有助于未來對基于碳管的單激子器件尺寸的設(shè)計(jì)研究.
[Abstract]:Aiming at the diffusion characteristics of exciton in bridged single-walled carbon nanotubes, the one-dimensional diffusion model of exciton was established, and the diffusion and composite luminescence process of exciton in carbon nanotubes were investigated. By solving the one-dimensional diffusion equation of exciton, the relationship between exciton density and luminous intensity with tube length and exciton diffusion length in carbon tube with finite length is simulated. The results show that the exciton diffusion length has an important effect on the intensity of exciton luminescence, and the larger exciton diffusion length can easily lead to the quenching of exciton boundary and decrease the luminescence intensity and efficiency. The results are not only helpful to the measurement of exciton diffusion length in carbon nanotubes, but also helpful to the design and research of single exciton devices based on carbon tubes in the future.
【作者單位】： 湖州師范學(xué)院理學(xué)院;
【基金】：浙江省自然科學(xué)基金(LY15A040003) 浙江省大學(xué)生科技創(chuàng)新活動計(jì)劃暨新苗人才計(jì)劃(2015R427012)
【分類號】：TQ127.11;TB383.1

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