Author Affiliations
Abstract
1 Department of Optical Science and Engineering, Fudan University, Shanghai 200433, China
2 Shanghai Engineering Research Center for Ultra-Precision Optical Manufacturing, Fudan University, Shanghai 200433, China
Tris-(8-hydroxyquinoline)-aluminum (Alq3)–based organic light-emitting diodes with Co electrode are fabricated. The positive magnetic electroluminescence (MEL) and magnetic conductance (MC) are observed in the samples, reaching 4.35% and 1.67% under the field of 42 mT at 50 K, respectively, and the MEL and MC traces can be fitted to non-Lorentzian line shapes. The MEL varies as a function of the Co thickness and reaches the optimal value at 10 nm. The MEL and MC dependence on voltage and temperature is also investigated. The electron-hole pair model and the spin-polarized injection mechanism are used to understand the experimental results.
250.3680 Light-emitting polymers 310.6870 Thin films, other properties Chinese Optics Letters
2016, 14(6): 062501
与传统量子点相比, 碳量子点作为一种新型的荧光碳纳米材料, 由于其良好的生物相容性、 易于表面功能化、 低毒性等优点受到了广泛关注。 采用柠檬酸为碳源, 氨水为氮源, 热解法制备出水溶性好的氮掺杂碳量子点(NCDs)。 透射电镜(TEM)观察NCDs的粒径在3 nm左右; X射线光电子能谱(XPS)和傅里叶红外光谱(FIIR)证明NCDs的表面被羧基、 氨基、 羟基、 羰基等官能团功能化, 说明NCDs有很好的水溶性。 研究还发现Hg2+对NCDs的荧光有良好的猝灭作用, 可作为荧光探针检测水中Hg2+含量。 在PBS缓冲液中(0.1 mol·L-1 pH 7.0), NCDs的荧光猝灭率(F/F0)与汞离子浓度在0.001～0.1 μmol·L-1之间存在良好的线性关系, 检出限为2.1 nmol·L-1。 该方法灵敏度高、 选择性好、 方法简便, 可应用于Hg2+快速、 灵敏的检测。
碳量子点 氮掺杂 荧光探针 汞离子 Carbon quantum dots Nitrogen-doped Fluorescent sensor Mercury ion 光谱学与光谱分析
2016, 36(9): 2846
Author Affiliations
Abstract
A series of Alx-(Alq3)1-x granular films is prepared on Si wafer with native oxide layer using co-evaporation technique. Large lateral photovoltaic effect (LPE) is observed, with an optimal LPV sensitivity of 75 mV/mm in x = 0.35 sample. The dependence of LPE on temperature and Al composition is investigated, and the possible mechanism is discussed.
040.5160 Photodetectors 040.5350 Photovoltaic 160.4890 Organic materials Chinese Optics Letters
2014, 12(4): 040402
