Nondispersive hole transport of liquid crystalline glasses and a cross-linked network for organic electroluminescence

S. R. Farrar, A. E.A. Contoret, M. O'Neill, J. E. Nicholls, G. J. Richards, S. M. Kelly

研究成果: Article査読

61 被引用数 (Scopus)

抄録

Photocurrent time-of-flight experiments are used to study the transport properties of hole-conducting nematic liquid crystals. Nondispersive transients are observed and a value of 4 × 10-4 cm2V-1s-1 is found for the hole mobility of a chiral nematic glass at room temperature. The hole mobility of a reactive mesogen in the nematic glass phase is increased by photopolymerization of its reactive end chains to form an insoluble network. The mobility of the network shows a weak field dependence over the temperature range 295-373 K. The experimental data can be explained by hopping between the nematic cores using a Gaussian disorder model that includes spatial correlations in the carrier energy. The density-of-state distribution obtained from the model agrees with that measured spectroscopically.

本文言語English
論文番号125107
ページ(範囲)1251071-1251075
ページ数5
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
66
12
出版ステータスPublished - 2002 9 15
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

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