| Budget Amount *help |
¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Fiscal Year 2015: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥9,750,000 (Direct Cost: ¥7,500,000、Indirect Cost: ¥2,250,000)
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| Outline of Final Research Achievements |
We present efficient electron-transport materials based of polymers. Conjugated copolymers composed of BODIPY or Aza-BODIPY were synthesized. The polymers exhibited high solubility in polar solvents. Their electronic and optical properties were studied. The absorption and photoluminescence spectra of the obtained polymers were red-shifted in comparison with the corresponding monomers due to the increase in the HOMO level by the formation of donor-acceptor interactions and the expansion of main-chain conjugations. Finally, the electron mobilities of the polymers were determined from the space-charge limited current with electron-only device structure. As a result, owing to their high electron acceptability and strong stacking interaction among the BODIPY or Aza-BODIPY units, it was found that the mobilities for the polymers were much higher than the value of Alq3, and their threshold voltages (7 V) were much smaller than that of the Alq3 device (12 V).
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