TY - JOUR

T1 - Low Band Gap Polymers for Roll-to-Roll Coated Polymer Solar Cells

A1 - Bundgaard,Eva

A1 - Hagemann,Ole

A1 - Manceau,Matthieu

A1 - Jørgensen,Mikkel

A1 - Krebs,Frederik C

A1 - Krebs,Frederik C.

AU - Bundgaard,Eva

AU - Hagemann,Ole

AU - Manceau,Matthieu

AU - Jørgensen,Mikkel

AU - Krebs,Frederik C

AU - Krebs,Frederik C.

PB - American Chemical Society

PY - 2010

Y1 - 2010

N2 - We present the synthesis of a low band gap copolymer based on dithienothiophene and dialkoxybenzothiadiazole (poly(dithienothiophene-co-dialkoxybenzothiadiazole), PDTTDABT). The optical properties of the polymer showed a band gap of 1.6 eV and a sky-blue color in solid films. The polymer was explored in roll-to-roll coating experiments and was optimized with respect to the manufacturing process and mixing ratio with [60]PCBM through a series of experiments with variation of the composition in steps of 1% w/w of respectively PDTTDABT and [60]PCBM and a relatively broad optimimum was found around a 1:2 mixing ratio. Roll-to-roll coated polymer solar cell devices were prepared under ambient conditions employing solution processing in all steps including the metallic back electrode that was printed as a grid giving semitransparent solar cell devices. Solar cell modules comprising 16 serially connected cells were prepared with a total module active area of 96 cm2. The devices were tested for operational stability under simulated sunlight (AM1.5G) and natural sunlight, and the photochemical stability of the polymer was examined using a combination of UV−vis and IR spectroscopy.

AB - We present the synthesis of a low band gap copolymer based on dithienothiophene and dialkoxybenzothiadiazole (poly(dithienothiophene-co-dialkoxybenzothiadiazole), PDTTDABT). The optical properties of the polymer showed a band gap of 1.6 eV and a sky-blue color in solid films. The polymer was explored in roll-to-roll coating experiments and was optimized with respect to the manufacturing process and mixing ratio with [60]PCBM through a series of experiments with variation of the composition in steps of 1% w/w of respectively PDTTDABT and [60]PCBM and a relatively broad optimimum was found around a 1:2 mixing ratio. Roll-to-roll coated polymer solar cell devices were prepared under ambient conditions employing solution processing in all steps including the metallic back electrode that was printed as a grid giving semitransparent solar cell devices. Solar cell modules comprising 16 serially connected cells were prepared with a total module active area of 96 cm2. The devices were tested for operational stability under simulated sunlight (AM1.5G) and natural sunlight, and the photochemical stability of the polymer was examined using a combination of UV−vis and IR spectroscopy.

KW - Polymer solar cells

KW - Solar energy

KW - Plastsolceller

KW - Solenergi

U2 - 10.1021/ma1015903

DO - 10.1021/ma1015903

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 19

VL - 43

SP - 8115

EP - 8120

ER -