2014
DOI: 10.1039/c4ee02003k
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Flexible organic tandem solar modules with 6% efficiency: combining roll-to-roll compatible processing with high geometric fill factors

Abstract: Organic solar cell technology bears the potential for high photovoltaic performance combined with truly low-cost, high-volume processing.Here we demonstrate organic tandem solar modules on flexible substrates fabricated by fully roll-to-roll compatible processing at temperatures <70 C. By using ultrafast laser patterning we considerably reduced the "dead area" of the modules and achieved geometric fill factors beyond 90%. The modules revealed very low interconnection-resistance compared to the single tandem ce… Show more

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Cited by 75 publications
(68 citation statements)
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“…The GFF was found to be B91% (considering the sum of active and dead areas and neglecting possible bus bar losses). 37 The V oc losses are restrained to B3% with respect to the maximum V oc of a twocell module. With 62% the FF is even slightly higher than that in the reference cell, confirming the quality of the active layer and interfaces in the module.…”
Section: Solar Modules By Depth-resolved Laser Patterningmentioning
confidence: 99%
See 1 more Smart Citation
“…The GFF was found to be B91% (considering the sum of active and dead areas and neglecting possible bus bar losses). 37 The V oc losses are restrained to B3% with respect to the maximum V oc of a twocell module. With 62% the FF is even slightly higher than that in the reference cell, confirming the quality of the active layer and interfaces in the module.…”
Section: Solar Modules By Depth-resolved Laser Patterningmentioning
confidence: 99%
“…A mechanically robust IMI (ITO/Ag/ITO) coated PET foil featuring a sheet resistance of 7.7 O sq À1 was chosen as the transparent bottom electrode. 37 On top of IMI, we processed commercial ZnO nanoparticles (Nanograde) as the electron selective electrode. As a photoactive layer we coated a medium band gap conjugated polymer PBTZTstat-BDTT-8 38,39 (Fig.…”
Section: Laminated Solar Cellsmentioning
confidence: 99%
“…1 Despite the high efficiencies reported on lab scale devices, which recently surpassed 10% power conversion efficiency (PCE) for organic photovoltaics (OPV) 2 and 20% 3 for perovskite based ones, very little progress is shown towards up-scaling processing of solar cells. [4][5][6][7][8] Large area, roll-to-roll (R2R) processed solar cells and modules usually show a quite remarkable drop in efficiencies compared to small area, lab-produced hero cells, 9 highlighting the importance of the development of a stable, reliable production process which should allow a minimization of the performance losses.…”
Section: Introductionmentioning
confidence: 99%
“…Larger devices have been produced but with reduced efficiencies (5.7% with 0.1 cm 2 active area and 3.3% with 29 cm 2 active area), but these do not compare to Silicon systems which are already on rooftops, typically with an power density of 150-200 kW m −2 for modules. 6,10,11 Although the efficiency and lifetimes are lower for organic solar cells than silicon solar cells, the low-cost potential means that not much improvement of the current state would mean that organic solar cells could contend with silicon-based systems. The levelised electricity cost (cost of kWh produced from a system including all factors such as capital, discount rates, maintenance and costs of continuous operation) has been predicted to be competitive if organic solar modules could be produced with a 7% efficiency and a 5-year lifetime.…”
Section: Introduction To Organic Solar Cellsmentioning
confidence: 99%