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Efficient organic photovoltaic tandem cells consist of P3HT:bis[60]PCBM and P3HT:[70]PCBM active layers and transparent conductive oxide interlayer are presented. A short circuit current and a conversion efficiency are estimated at more than 6 mA/cm2 and 5 % from optical simulation and optimization of the both active layer thicknesses. We clarify the almost same characteristics is achieved by the...
Electroluminescent (EL) diodes utilizing poly(3-alkylthiophene) (P3AT) containing fluorescent dyes have been fabricated. It has more than 500 times higher EL efficiency in P3AT diodes doped with (1,2,3,4,5-pentaphenyl-1,3-cyclopentadiene) (PPCP) than in undoped diode. The mechanism of emission enhancement in P3AT diodes with different alkyl-side-chain length has been discussed in terms of carrier...
Color switching organic electroluminescent (EL) diodes have been realized in vapor deposited multi-layered EL device, which emit blue or red. The EL device consists of multi-layer structure of dye molecules which emit blue or red. EL emission color in the multi-layered device can be changed by applying opposite bias field. The mechanism of different color emission has been discussed in terms of carrier...
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