substrates accounts for 90% of the total energy required for manufacturing OPV. [ 8 ] To achieve ITO-free and fully solutionprocessed organic solar cells, the choice and processing of the anode and cathode electrodes are two challenges which require different considerations. Solutionprocessed bottom electrodes based on poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS), AgNW and metallic grid electrodes are constantly narrowing the gap to ITO. [9][10][11][12][13][14][15][16] The main challenge for fully solution-processed devices remains the combination of a bottom and a top electrode, because the very thin and/ or soft underlying layers have to resist the solution deposition of the top electrode. Recently, solution-processed graphene, [ 17 ] AgNW, [ 18 , -21 ] silver nanoparticles [ 22 ] and PEDOT:PSS [ 23,24 ] were investigated as transparent top electrodes for organic solar cells. However, devices with incorporation of these top electrodes suffered either from the inferior optoelectronic properties of the electrodes or their multi-transfer processing procedure. On the other hand, aesthetic (semi-)transparent solar cells with special applications in windows, foldable curtains, buildings and clothes, etc., have recently gained much scientifi c attention and are considered to be the highest priority market for OPV. [ 25 ] We report here on materials and processes for reliable and cost-effi cient processing of ITO-free semitransparent organic solar cells from solution. Fully solution-processed organic solar Organic photovoltaic (OPV) solar cells that can be simply processed from solution are in the focus of the academic and industrial community because of their enormous potential to reduce cost. One big challenge in developing a fully solution-processed OPV technology is the design of a well-performing electrode system, allowing the replacement of ITO. Several solution-processed electrode systems were already discussed, but none of them could match the performance of ITO. Here, we report effi cient ITO-free and fully solution-processed semitransparent inverted organic solar cells based on silver nanowire (AgNW) electrodes. To demonstrate the potential of these AgNW electrodes, they were employed as both the bottom and top electrodes. Record devices achieved fi ll factors as high as 63.0%, which is comparable to ITO based reference devices. These results provide important progress for fully printed organic solar cells and indicate that ITO-free, transparent as well as non-transparent organic solar cells can indeed be fully solution-processed without losses.

The interplay of the polyelectrolyte-surface electrostatic and non-electrostatic interactions in the polyelectrolytes adsorption onto two charged objects -A self-consistent field study J. Chem. Phys. 137, 104904 (2012) Voltage-induced deformation in dielectric J. Appl. Phys. 112, 033519 (2012) Concentration and mobility of charge carriers in thin polymers at high temperature determined by electrode polarization modeling J. Appl. Phys. 112, 013710 (2012) Crystal phase dependent photoluminescence of 6,13-pentacenequinone J. Appl. Phys. 112, 013512 (2012) Frequency-dependent dielectric response model for polyimide-poly(vinilydenefluoride) multilayered dielectrics Appl.

We report a quantitative study that describes and correlates the threshold voltage of low-voltage organic field-effect transistors with the molecular structure of self-assembled monolayer dielectrics. We have observed that the component of the dipole moment of such self-assembled molecules perpendicular to the surface correlates linearly with the threshold voltage shift in devices. The model was validated using three different organic semiconductors (pentacene, α,α'-dihexylsexithiophene, and fullerene-C(60)) on six different self-assembled monolayers. The correlation found can help optimize future devices, by tuning the dipole moments of the molecules that constitute the self-assembled monolayer.

The influence of aluminum‐doped zinc oxide (AZO) electron extraction layers modified with self‐assembled monolayers (SAMs) on inverted polymer solar cells is investigated. It is found that AZO modification with phosphonic acid‐anchored Fullerene–SAMs leads to a reduction of the series resistance, while increasing the parallel resistance. This results in an increased efficiency from 2.9 to 3.3%.

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