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Multilayer diodes using poly (2,5-(dimethoxy)-p-phenylene vinylene)-p-phenylene vinylene) copolymer as an emitting layer have been investigated by electrical and electroluminescent characterizations. It has been demonstrated that three-layer devices composed of the copolymer sandwiched between poly (p-phenylene vinylene) (PPV) and polyphenylquinoxaline (PPQ) films have stronger emission than that...
A study of the multiphonon (MP) Raman scattering in ZnSe/Zn 0.80 Cd 0.20 Se superlattices has been performed for the first time. Two kinds of longitudinal optical phonon modes were observed under the excitation of the 457.9 nm (2.71 eV) and 488.0 nm (2.54 eV) lines of an Ar + ion laser at room temperature. A systematic discussion to distinguish...
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