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Blue emission mechanism of NPB/ZnSe hybrid structure
Author(s)
Date Issued
August 28, 2007
Type
Conference Paper
Abstract
The electrical and optical properties of organic-inorganic hybrid light emitting diodes (HLED) have been investigated. The HLED is consisted of organic material N,N'-di(naphthalene-1-yl)-N,N'- diphenyl-benzidine (NPB) as a hole transport layer and inorganic material zinc selenide (ZnSe) as an electron transport layer and emitting layer as well. The electrical and optical properties have been characterized by current-voltage measurement and electroluminescence (EL) spectroscopy, respectively. The current of HLED decreases with increasing ZnSc thickness, while the threshold voltage increases. The EL spectrum exhibits two peaks at 457 nm and 500 nm, due to electron-hole recombination from energy gap of ZnSe and recombination from defect states in ZnSe layer, respectively. The emission mechanism is described by electric field in organic and inorganic layers. © 2007 IEEE.
Citation
Proceedings of the 2nd IEEE International Conference on Nano Micro Engineered and Molecular Systems IEEE NEMS 2007, 643-646, 2007