Hybrid white-light emitting-LED based on luminescent polyfluorene polymer and quantum dots.
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.
Phosphors Research Laboratory, Department of Applied Chemistry and UST-CNST, National Chiao Tung University, Hsinchu 30050, Taiwan.
Cheng-Hsuan
CH
Chou
Chung-He
CH
Yang
Chain-Shu
CS
Hsu
Teng-Ming
TM
Chen
D019187:Cadmium Compounds / Q000737:chemistry; D004563:Electrochemistry / Q000379:methods; D005449:Fluorenes / Q000737:chemistry*; D008027:Light; D008956:Models, Chemical; D008968:Molecular Conformation; D053758:Nanoparticles / Q000737:chemistry; D049329:Nanostructures; D036103:Nanotechnology / Q000379:methods*; D011108:Polymers / Q000737:chemistry*; D045663:Quantum Dots; D018036:Selenium Compounds / Q000737:chemistry; D013440:Sulfides / Q000737:chemistry; D013455:Sulfur / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry
D019187:Cadmium Compounds; D005449:Fluorenes; D011108:Polymers; D018036:Selenium Compounds; D013440:Sulfides; D017967:Zinc Compounds; D013455:Sulfur; C058667:cadmium selenide; C031238:zinc sulfide