SYNTHESIS, LAYER ASSEMBLY, AND FLUORESCENCE DYNAMICS OF POLY(PHENYLENEVINYLENE) OLIGOMER PHOSPHONATES

We report the synthesis and spectroscopic study of a new molecularly e ngineered multilayer structure. The chromophore, which is an oligomer of poly(p-phenylenevinylene), is analogous to polymeric PPV which has been used in the fabrication of LEDs. This study was initiated specifi cally to explore if a multilayer geometry would aid the transport prop erties of the material leading to better semiconductor performance. We describe the synthesis and film formation of these novel materials. D etailed dynamic photophysical measurements on several new multilayer m aterials have shown that spectroscopically these thin films behave sim ilarly to the polymers. The quantum yields of the films are of the sam e order of magnitude indicating that the emissive properties in both m aterials are due to localized molecular interactions. The relevance of the material properties to device applications is discussed.