Polymer light-emitting diodes device characteristics

ID Parker, Carrier tunneling and device characteristics in polymer light emitting diodes, J. Appl. Phys., 75 1656-1666, 1994. 

The aim of this chapter is to present a simple but general band structure picture of the metal-semiconductor interface and compare that with the characteristics of the metal-conjugated polymer interface. The discussion is focused on the polymer light emitting diode (LED) for which the metal-polymer contacts play a central role in the performance of the device. The metal-polymer interface also applies to other polymer electronic devices that have been fabricated, e.g., the thin-film field-effect transistor3, but the role of the metal-polymer interface is much less cruical in this case and... 

Brown, T.M., et al. 2000. LiF/Al cathodes and the effect of LiF thickness on the device characteristics and built-in potential of polymer light-emitting diodes. Appl Phys Lett 77 3096-3098. 

Abstract. This article reviews mainly the results of our recent research on the relationship between the structure and the luminescence properties of PPV derivatives. PPV derivatives are particularly useful in an effort toward the establishment of such relationship because their chemical structures can be manipulated very systematically. Attachment of a wide variety of substituents, inclusion of kinky structural units, modification of main chain structures by inclusion of hole- and/or electron-transferring structures, and blending of polymers having different optical and electronic properties are representative approaches. The device characteristics of the light-emitting diodes (LEDs) fabricated from these polymers are discussed in relation to their structures. In certain cases, their photoluminescence (PL) properties are compared with their electroluminescence (EL) properties. 

Yb(TPP)Tp] was blended with the polymers poly (methylmethacrylate), poly(Y-butylmethacrylate), and with poly(bisphenol-A-carbonate). Near-IR emitting polymeric light-emitting diodes (PLEDs) were fabricated by spin-coating of films of the [Yb(TPP)Tp]/polymer blends on ITO glass substrates. The best device characteristics concerning the near-IR irradiance and EL efficiency was obtained for the [Yb(TPP)Tp]/PMMA blend. Flexible PLEDs can be fabricated from the [Yb(TPP)Tp]/PBMA blend.214... 

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