Improved performance of CdSe/ZnS quantum dot light-emitting diodes through doping with small molecule CBP

The poor film formation of CdSe/ZnS quantum dots (QDs) during spin-coating makes a substantial impact on the device performance of quantum dot light-emitting diodes (QLEDs). This work proposes a method to improve the morphology of the quantum dot light-emitting layer (EML) by adding small organic molecular 4,4''-Bis(9H-carbazol-9-yl) biphenyl (CBP) into the layer. Its surface roughness reduces from 6.21 nm to 2.71 nm, which guarantees a good contact between hole transport layer (HTL) and EML. Consequently, the CdSe/ZnS QDs:CBP based QLED achieves maximum external quantum efficiency (EQE) of 5.86%, and maximum brightness of 10 363 cd/m2. It is demonstrated that the additive of small organic molecules could be an effective way to improve the brightness and the efficiency of QLEDs.     

Research on flexible silver nanowire electrode for organic light-emitting devices

By spin-coating silver nanowires(AgNWs) and polymethyl methacrylate(PMMA), applying pressure imprint and plasma treatment, we obtained flat Ag NW thin film with a sheet resistance of 20 Ω/sq and a transmittance of 78% at 550 nm with low surface roughness. No significant change in sheet resistance was observed after cyclic bending(bending radius is 5 mm) test and tape test. After 1 000 bending tests, the change rate of sheet resistance was only 8.3%. The organic light-emitting devices(OLEDs) were prepared by using such Ag NW electrodes and a maximum brightness of 5 090 cd/m² was obtained. Compared with the Ag NWs electrode without any treatment, the present Ag NW electrodes have lower sheet resistance and better hole injection. Our results show spin-coated with flat layers, embossed and plasma-treated Ag NW electrodes are suitable for manufacturing flexible organic optoelectronic devices.     

高硅沸石吸附水中有机微污染物的研究进展

沸石是一类具有有序微孔网络的多孔材料,其中高硅沸石具有较高的硅铝比,呈现优异疏水性,被工业广泛应用.目前,高硅沸石已被用于去除水中有机微污染物(OMPs),如各种药物、个人护理产品等.本综述对高硅沸石的性质和基本原理总结,分析高硅沸石吸附OMP的机理,评估高硅沸石在水处理中吸附OMP的潜在机遇和挑战.总结发现,吸附容量...