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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Marder, Seth R.
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2023Additive-free molecular acceptor organic solar cells processed from a biorenewable solvent approaching 15% efficiencycitations
- 2022Controlled n‐Doping of Naphthalene‐Diimide‐Based 2D Polymerscitations
- 2022Visualisation of individual dopants in a conjugated polymer : sub-nanometre 3D spatial distribution and correlation with electrical propertiescitations
- 2022Double Doping of a Low-Ionization-Energy Polythiophene with a Molybdenum Dithiolene Complexcitations
- 2020Ruthenium pentamethylcyclopentadienyl mesitylene dimer: a sublimable n-dopant and electron buffer layer for efficient n-i-p perovskite solar cellscitations
- 2019Enhanced Thermoelectric Power Factor of Tensile Drawn Poly(3-hexylthiophene)citations
- 2019Interfacial charge-transfer doping of metal halide perovskites for high performance photovoltaicscitations
- 2017Absorption Tails of Donor:C-60 Blends Provide Insight into Thermally Activated Charge-Transfer Processes and Polaron Relaxationcitations
- 2017Molecular weight tuning of low bandgap polymers by continuous flow chemistry: increasing the applicability of PffBT4T for organic photovoltaicscitations
- 2016Phosphonic Acids for Interfacial Engineering of Transparent Conductive Oxidescitations
- 2016An Introduction to the Electronic Structure of π-Conjugated Molecules and Polymers, and to the Concept of Electronic Bands
- 2015Mechanism that governs the electro-optic response of second-order nonlinear polymers on silicon substratescitations
- 2013Physical mixtures of small-molecule and polymeric organic semiconductorscitations
- 2012Surface-initiated synthesis of poly(3-methylthiophene) from indium tin oxide and its electrochemical propertiescitations
- 2009Direct writing and characterization of poly(p -phenylene vinylene) nanostructurescitations
- 2008Reversible nanoscale local wettability modifications by thermochemical nanolithography
- 2007Analysis of improved photovoltaic properties of pentacene/C60 organic solar cellscitations
- 2007Norbornene-based copolymers with iridium complexes and bis(carbazolyl) fluorene groups in their side-chains and their use in light-emitting diodescitations
- 2007High-speed, sub-15 nm feature size thermochemical nanolithographycitations
- 2000Two-photon fluorescent labels with enhanced sensitivity for biological imaging
Places of action
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article
Analysis of improved photovoltaic properties of pentacene/C60 organic solar cells
Abstract
<p>We report on the photovoltaic properties of organic solar cells based on pentacene and C<sub>60</sub> thin films with a focus on their spectral responses and the effect of thermal annealing. Spectra of external quantum efficiency (EQE) are measured and analyzed with a one-dimensional exciton diffusion model dependent upon the complex optical functions of pentacene films, which are measured by spectroscopic ellipsometry. An improvement in EQE is observed when the thickness of the bathocuproine (BCP) layer is decreased from 12 nm to 6 nm. Detailed analysis of the EQE spectra indicates that large exciton diffusion lengths in the pentacene films are responsible for the overall high EQE values near wavelengths of 668 nm. Analysis also shows that improvement in the EQE of devices with the thinner BCP layer can be attributed to a net gain in optical field distribution and improvement in carrier collection efficiency. An improvement in open-circuit voltage (V<sub>OC</sub>) is also achieved through a thermal annealing process, leading to a net increase in power conversion efficiency. Integration of the EQE spectrum with an AM1.5 G spectrum yields a predicted power conversion efficiency of 1.8 ± 0.2%. The increase in V<sub>OC</sub> is attributed to a significant reduction in the diode reverse saturation current upon annealing.</p>