Flexible Substrate Requirements for Organic Photovoltaics

MacDonald, William; Mace, Julian M.

doi:10.1002/9783527656912.ch17

Cited by 1 publication

(1 citation statement)

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“…[9] have developed flexible foil substrates for CdTe thin film solar cells based on flexible stainless steel (SS) substrate. However, in order to reach high device efficiencies on flexible substrates, further studies on the appropriate processes and materials used in the inverted organic solar cells are needed [9,10]. Here, we use poly(ethylene-2,6-naphthalate) (PEN) as a substrate which cannot be heated above its glass transition temperature of 125 o C. However, its working temperature spans up to 155 o C [11] and PEN has a very strong resistance to many diluted acids and solvents.…”

Section: Introductionmentioning

confidence: 99%

Morphological and micro-structural interface characterization in multilayer inverted polymer-fullerene bulk heterojunction solar cells

Jouane

Moubah

Schmerber

et al. 2018

Solar Energy Materials and Solar Cells

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Inverted polymer solar cells based on P3HT/PCBM bulk heterojunction were prepared on flexible polyethylene naphthalate (PEN) substrate. The effect of annealing of the PEN/ITO/ZnO multilayer and ZnO/P3HT:PCBM on the structural, morphological, photophysical and photovoltaic properties was investigated and scrutinized directly on the OPV devices using atom probe tomography (APT), scanning electron microscopy (SEM) and microfocus X-rays techniques. We carried out a 3D reconstruction of the interfaces of the multilayer containing PEN/ITO, ZnO/ITO and P3HT:PCBM/ZnO to address the interface micro-structure and its influence on the morphology of the photoactive film. The analyses show that the morphology of the interfaces is affected by the structure of each layer of the BHJ devices causing orientation of P3HT crystals with PCBM aggregates and ZnO, which in turn leads to a significant change of the charge transport across each layer and therefore photovoltaic performances.

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