Electroluminescence from a conjugated polymer grafted with CdSe/ZnS quantum dots: High brightness and improved efficiency

POLY 162

Kuei-Bai Chen, lukawa.ac89g@nctu.edu.tw1, Ming-Hwey Chen, bouze.ac93g@nctu.edu.tw1, Sheng-Hsiung Yang, yangsh@mail.nctu.edu.tw1, Chain-Shu Hsu, cshsu@mail.nctu.edu.tw1, Chia-Chun Chen, cjchen@cc.ntnu.edu.tw2, and Hsiao-Ju Chien2. (1) Department of Applied Chemistry, National Chiao Tung University, 1001 Ta-Hsueh Rd., Hsinchu, 30010, Taiwan, (2) Department of Chemistry, National Taiwan Normal University, No. 88, Sec. 4,Ting-Chow Rd., Taipei 116, Taiwan
A new series of sulfide-substituted poly(1,4-phenylene vinylene) derivatives (S1PPV~S3PPV) with different composition ratios were successfully synthesized via the Gilch route. The CdSe/ZnS were grafted to the sulfur atoms by ligand exchange reaction. A new peak at 1151 cm-1 formed in FT-IR after ligand exchange, which is attributed to the force formation between sulfur and CdSe. The GPC results show that the molecular weights of final polymers became higher after ligand exchange. Thin films of obtained polymers emitted bright green and yellow light with the max emission peak located from 546 to 556 nm. As the CdSe/ZnS content increased in grafted polymers, the device performance was significantly enhanced as compared to pristine polymers. In the case of S3PPV, the double-layer device showed a maximum luminance of 6073 cd/m2 with a current yield of 0.82 cd/A. The maximum luminance and current yield was enhanced to 13390 cd/m2 and 2.25 cd/A by grafting CdSe/ZnS onto polymers.

 

General Papers: Synthesis and Characterization
6:00 PM-8:00 PM, Sunday, 10 September 2006 Moscone Center -- Hall D, Poster

Division of Polymer Chemistry

The 232nd ACS National Meeting, San Francisco, CA, September 10-14, 2006