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Improved Optoelectronic Characteristics of Light-Emitting Diodes by Using a Dehydrated Nanotube Titanic Acid (DNTA)−Polymer Nanocomposite

2004; American Chemical Society; Volume: 108; Issue: 37 Linguagem: Inglês

10.1021/jp047593a

1520-6106

Lei Qian, Feng Teng, Zhensheng Jin, Z.-J. Zhang, T. Zhang, Yuhan Hou, Shao‐Yu Yang, Xianzhen Xu,

Conducting polymers and applications

In this paper, we have demonstrated that P-type dehydrated nanotube titanic acid (DNTA) can significantly enhance hole injection and transport in holes-only transport devices. In the low field region, the dominant conduction mechanism is injection limited. This gradually transitions to space charge limited current via trapped charge limited current with increasing applied voltages. Through fabricated and characterized organic light-emitting diodes (OLEDs) and by using a DNTA−poly(vinylcarbazole) (PVK) nanocomposite as the hole transport layer, we found that the performance of these devices was greatly improved with a higher luminance, an enhanced efficiency, and a lower turn-on voltage.