期刊
APPLIED PHYSICS LETTERS
卷 94, 期 10, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3086897
关键词
current density; electron mobility; energy gap; hole mobility; infrared spectra; photoconductivity; polymer blends; polymer films; solar cells; ultraviolet spectra; visible spectra
资金
- Office of Naval Research [N000140811226]
- Camille Dreyfus Teacher Scholar Award
- ConvEne IGERT Program [NSF-DGE0801627]
Bulk heterojunction solar cells are fabricated from blends of oligothiophene with a dialkylated diketopyrrolopyrrole chromophore:[6,6]-phenyl C-71 butyric acid methyl ester. Absorption and photocurrent of the films extend to 800 nm. A power conversion efficiency (PCE) of 3.0% is obtained under simulated 100 mW/cm(2) AM1.5 illumination with a 9.2 mA/cm(2) short-circuit current density and an open-circuit voltage of 0.75 V. The hole and electron mobilities in the 50:50 blend are fairly balanced, 1.0x10(-4) and 4.8x10(-4) cm(2)/V s, respectively. This is the highest PCE reported to date for solar cells using solution processable small molecules.
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