Hybrid white-light emitting-LED based on luminescent polyfluorene polymer and quantum dots
Cheng-Hsuan Chou1, Chung-He Yang, Chain-Shu Hsu
1Phosphors Research Laboratory, Department of Applied Chemistry and UST-CNST, National Chiao Tung University, Hsinchu 30050, Taiwan.
Abstract:
We report the fabrication and electroluminescence (EL) characterization of a white-emitting hybrid organic/inorganic light emitting device (LED) by integrating core-shell CdSe/ZnS quantum dots (QDs) acting as a yellow emitter and polyfluorenes as the blue emitter in a multilayered structure. The hybrid white-emitting device was fabricated by spin-coating QDs in varied concentrations onto the layer of polyfluorenes with different functional groups (i.e., sulfur-containing PF1 and PFO). Depending on the QDs concentrations and the design of the hybrid LED, our device is able to exhibit either electroluminescence from QDs or a combination of both PF and QD. The EL spectra at different driving voltages, I-V characteristics, and EL chromaticity of the LEDs based on PF1/QD and PFO/QD LEDs have been measured, investigated, and compared, respectively.
Related Concept Videos
Photoluminescence: Fluorescence and Phosphorescence
A pair of electrons in a...
Photoluminescence: Applications


