.Investigation of spectrum blue shift in organic quantum well electroluminescent devices[J].Optoelectronics Letters,2007,3(1):37-39 Investigation of spectrum blue shift in organic quantum well electroluminescent devices HUANG Jin-zhao XU Zheng Key Laboratory of Luminescence and Optical Information, Ministry of Education, Institute of Optoelectronic Technology, Beijing Jiaotong University, Beijing 100044, China Abstract:       In this paper,the organic quantum well devices,which are similar to the type- Ⅱ quantum well of inorganic semiconductor,have been fabricated,in which the 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. In the electroluminescence,the blue shift of spectrum with the decreasing of well width is observed for the device with different well width,and this is interpreted by combination of quantum size effect and exciton confinement effect. The blue shift of spectrum with increasing applied voltage is observed for the same device,and this is interpreted in terms of polarization effect and quantum size effect. Hits: 3704 Download times: 226 View Full Text    Download reader