Produção Nacional
Synthesis, properties, and applications of poly(p-phenylene vinylene)S
2001; Elsevier BV; Linguagem: Inglês
10.1016/b978-012513745-4/50067-6
AutoresJonas Gruber, Rosamaria Wu Chia Li, Ivo A. Hümmelgen,
Tópico(s)Organic Light-Emitting Diodes Research
ResumoThis chapter discusses the synthesis, properties, and applications of poly(p-phenylene vinylene) (PPV). The infrared (IR) spectrum of unsubstituted PPV has been studied in detail and assignments made to almost all the observed bands. PPV oligomers present optical absorption and luminescence spectra whose peaks are redshifted with increasing chain length. PPV and its derivatives are conventionally used in the form of thin films operating as active layers in light-emitting diodes (LEDs), photodetectors, and other optoelectronic devices. An important characteristic of devices constructed with PPV is that they operate with the polymer layer submitted to high electric-field strengths. To permit device operation at low voltages, on the order of a few volts, the polymer film thickness is reduced to around 102 nm. The production of high-quality polymer thin films constitutes an important step in the device construction process. PPV-based devices are commonly constructed in a multilayer structure in which the polymer film is sandwiched between charge injection electrodes; hence, the polymer/electrode interface plays an important role in the performance of the devices and is discussed in the chapter for different classes of materials.
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