Reduced threshold of optically pumped amplified spontaneous emission and narrow linewidth electroluminescence at cutoff wavelength from bilayer organic waveguide devices

Jui Fen Chang, Yu Syuan Huang, Po Ting Chen, Ruei Lin Kao, Xuan You Lai, Chii Chang Chen, Cheng Chung Lee

研究成果: 雜誌貢獻期刊論文同行評審

9 引文 斯高帕斯(Scopus)

摘要

We present a detailed study of the optically and electrically pumped emission in the BSB-Cz/PVK bilayer waveguide devices. By optical pumping we demonstrate that PVK as a spacer between fluorescent BSB-Cz and ITO electrode allows the significant reduction of the threshold for amplified spontaneous emission (ASE) of BSB-Cz. The simulation provides a better understanding of how the PVK thickness affects the waveguide mode field distribution and hence the ASE threshold of BSB-Cz. On the other hand, the BSB-Cz/PVK bilayer OLED exhibits the external quantum efficiency of >1% and anisotropic electroluminescence with spectrally narrowed edge emission at the cutoff wavelength controlled by the BSB-Cz thickness. When tuning the cutoff wavelength to match the peak gain of BSB-Cz, we demonstrate an intense, particularly narrow edge emission (∼5 nm) without obvious degradation of efficiency at a high current density of 1000 mA/cm2, suggesting a reliable device performance for high-power applications and further exploration of electrically-pumped ASE.

原文???core.languages.en_GB???
頁(從 - 到)14695-14706
頁數12
期刊Optics Express
23
發行號11
DOIs
出版狀態已出版 - 1 6月 2015

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