Title :
Investigating high-speed modulation characteristics of quantum dots in red emitting quantum dot-light emitting diodes
Author :
Zhang, Fan ; Zhang, Chunfeng ; Tan, Zhanao ; Zhu, Ting ; Xu, Jian
Author_Institution :
Dept. of Eng. Sci. & Mech., Penn state Univ., State College, PA
Abstract :
We investigate the high-speed modulation characteristics of quantum dots in red emitting quantum dot-light emitting diodes, in which the -3dB cutoff frequency for 6-mm2 device is 1.5 MHz under optimized conditions. The introduction of a positive offset DC bias voltage greatly increases the modulation speed at low applied voltage range.
Keywords :
II-VI semiconductors; cadmium compounds; electro-optical modulation; high-speed optical techniques; light emitting diodes; semiconductor quantum dots; zinc compounds; CdSe-CdZnS; frequency 1.5 MHz; high-speed modulation characteristics; positive offset DC bias voltage; quantum dot; red emitting quantum dot-light emitting diodes; Cutoff frequency; Fluorescence; Indium tin oxide; Light emitting diodes; Low voltage; Nanocrystals; Optical fiber communication; Quantum dots; Quantum mechanics; Substrates;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
