Optical and Electrical Properties of NPB/Alq3 Organic Quantum Well
HUANG Jin-zhao, XU Zheng, ZHAO Su-ling, ZHANG Fu-jun, WANG Yong
Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China
Abstract：In the present paper, the organic quantum-well device similar to the type-Ⅱ quantum well of inorganic semiconductor material was prepared by heat evaporation. NPB (N,N′-di-[(1-naphthalenyl)-N,N′-diphenyl]-(1,1′-biphenyl)-4,4′-diamine) and Alq3 (Tris-(8-quinolinolato)aluminum) act as the potential barrier layer and the potential well layer respectively. Besides, the single layer structure of Alq3 was prepared. In the experiments, the Frster nonradiative resonant energy transfer from the barrier layer to the well layer was identified, and the quantum well luminescence device possesses a favorable current-voltage property. The narrowing of spectrum was observed, and the spectrum shifted to blue region continuously when the applied voltage increased.
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