On the electroluminescence of anthracene before breakdown

Zvyagintsev, A. M.; Steblin, V. I.

doi:10.1007/bf02066476

Cited by 1 publication

(2 citation statements)

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“…If, however, the space charge increases linearly with U , that is d 0 ∼ = (ε 0 εU/en 0 ) 1/2 , F 0 ∼ = (en 0 U/ε 0 ε) 1/2 and EL (U ) coincides with the function expressed by equation (72). Such a behaviour had been seen, for instance, with EL in anthracene and tetracene-doped anthracene single crystals subjected to ac voltage excitation [97,98,101] (see figure 24). It is interesting to note that the constant b given by the slope of the log EL against U −1/2 plot is slightly different for host matrix (anthracene) and guest molecules (tetracene) emission components, but does not change with temperature.…”

Section: Single Crystalsmentioning

confidence: 84%

“…However, the vast majority of organic materials, especially at room temperature, exhibits mobilities much below this value [32], making this material property an important limiting factor in the operation mechanisms of organic LEDs. This also makes it difficult to understand EL characteristics observed in pioneering works on organic EL by Bernanose and co-workers [26,27] and later by other authors [96][97][98][99][100][101][102][103][104][105] who considered the phenomenon as an analogue of the Destriau effect [1][2][3]. The avalanche breakdown in gas microcavities incorporated into the samples has been proposed to alleviate the difficulties [106].…”

Section: Impact Elmentioning

confidence: 99%

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Electroluminescence in organics

Kalinowski

1999

J. Phys. D: Appl. Phys.

232

161

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There is growing interest in organic electroluminescence (EL). A great deal of progress has been made recently in improving the performance of various classes of organic EL devices. Some of these are now adequate for many applications. However, specialists focusing on selected aspects of organic EL devices have often lost contact with the general subject of EL. Therefore, a review covering all aspects of EL mechanisms and their experimental manifestation seemed necessary. This article is concerned with the new EL device physics that can be realized using crystals, or films made of organic materials, as electrically and optically active components, in devices ranging from simple single-component light emitting diodes (LEDs), through double-and multi-layer LEDs to light emitting electrochemical cells (LECs) and organic LED-based light transducers. The investigation of the properties of these devices has provided in turn a very effective method for studying the basic EL phenomena in these materials. Since the subject of the present review has generated a huge amount of literature, and it is impossible to mention here all that has been done, we have attempted to provide an outline of the background of the field of organic EL, and discussed in some detail those aspects most relevant to the EL device physics. Because of the diversity of the types of material and EL structure, there is no single, simple description of EL in organics. Therefore, the initial sections of the article are devoted to a discussion of the types of EL and related phenomena, such as carrier injection and recombination or nature of emitting states. Then, the fundamentals of the fabrication of various types of EL devices are discussed along with the most representative examples. In general, the reader will find in the article a brief historical review of the subject as well as a description of the latest trends in organic EL research covering all the new concepts and most important data which have become available before the time of publication.

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Section: Single Crystalsmentioning

confidence: 84%