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Monica Morales Masis

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Publications associées (39)

High performance amorphous Zn-Sn-O: impact of composition, microstructure, and thermal treatments in the optoelectronic properties

Christophe Ballif, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Monica Morales Masis, Federica Landucci, Oscar Esteban Rucavado Leandro

Zinc and tin oxides are both earth-abundant materials with demonstrated applicability as electrodes in several optoelectronic devices. The presence of grain boundaries in these polycrystalline films generally limits the electron mobility. By a combinatoria ...

Spie-Int Soc Optical Engineering2017

Microchannel contacting of crystalline silicon solar cells

Monica Morales Masis, Stephanie Essig

There is tremendous interest in reducing losses caused by the metal contacts in silicon photovoltaics, particularly the optical and resistive losses of the front metal grid. One commonly sought-after goal is the creation of high aspect-ratio metal fingers ...

Nature Research2017

Transparent Electrodes for Efficient Optoelectronics

Christophe Ballif, Stefaan De Wolf, Monica Morales Masis, Rachel Emma Woods-Robinson

With the development of new generations of optoelectronic devices that combine high performance and novel functionalities (e.g., flexibility/bendability, adaptability, semi or full transparency), several classes of transparent electrodes have been develope ...

2017

Mechanical integrity of hybrid indium-free electrodes for flexible devices

Christophe Ballif, Yves Leterrier, Ali Dabirian, Fabien Paul Jacques Dauzou, Monica Morales Masis

Maintaining electrical conductivity, optical transparency, and mechanical integrity against bending and stretching are key requirements for flexible transparent electrodes. Transparent conducting oxides (TCOs) are widely used thin film electrodes in optoel ...

Elsevier2016

An Indium-Free Anode for Large-Area Flexible OLEDs: Defect-Free Transparent Conductive Zinc Tin Oxide

Christophe Ballif, Aïcha Hessler-Wyser, Quentin Thomas Jeangros, Ali Dabirian, Fabien Paul Jacques Dauzou, Monica Morales Masis

Flexible large-area organic light-emitting diodes (OLEDs) require highly conductive and transparent anodes for efficient and uniform light emission. Tin-doped indium oxide (ITO) is the standard anode in industry. However, due to the scarcity of indium, alt ...

Wiley-Blackwell2016

Tuning the Optoelectronic Properties of ZnO:Al by Addition of Silica for Light Trapping in High-Efficiency Crystalline Si Solar Cells

Christophe Ballif, Aïcha Hessler-Wyser, Ali Dabirian, Stefaan De Wolf, Monica Morales Masis, Björn Niesen

Highly transparent electrodes with a well-tuned refractive index are essential for a wide range of optoelectronic devices, such as light emitting diodes and solar cells. Here, it is shown that the transparency of ZnO:Al can be improved and its refractive i ...

Wiley-Blackwell2016

Parasitic Absorption Reduction in Metal Oxide-Based Transparent Electrodes: Application in Perovskite Solar Cells

Christophe Ballif, Sylvain Nicolay, Ali Dabirian, Stefaan De Wolf, Jérémie Werner, Monica Morales Masis, Björn Niesen

Transition metal oxides (TMOs) are commonly used in a wide spectrum of device applications, thanks to their interesting electronic, photochromic, and electrochromic properties. Their environmental sensitivity, exploited for gas and chemical sensors, is how ...

Amer Chemical Soc2016

Zinc tin oxide as high-temperature stable recombination layer for mesoscopic perovskite/silicon monolithic tandem solar cells

Christophe Ballif, Sylvain Nicolay, Soo-Jin Moon, Arnaud Walter, Davide Sacchetto, Stefaan De Wolf, Xavier Niquille, Jérémie Werner, Monica Morales Masis, Björn Niesen, Philipp Friedrich Hermann Löper, Oscar Esteban Rucavado Leandro

Perovskite/crystalline silicon tandem solar cells have the potential to reach efficiencies beyond those of silicon single-junction record devices. However, the high-temperature process of 500 °C needed for state-of-the-art mesoscopic perovskite cells has, ...

American Institute of Physics2016

APCVD of dual layer transparent conductive oxides for photovoltaic applications

Monica Morales Masis, Benoît Florent Paul Delaup

We report the atmospheric pressure chemical vapour deposition (APCVD) of a dual layer transparent conductive oxide (TCO). This combines a fluorine doped tin oxide (FTO) base layer with a fluorine doped zinc oxide (FZO) top layer, where we seek to utilise t ...

Elsevier2015

In Situ Hall Effect Monitoring of Vacuum Annealing of In2O3:H Thin Films

Monica Morales Masis

Hydrogen doped In2O3 thin films were prepared by room temperature sputter deposition with the addition of H2O to the sputter gas. By subsequent vacuum annealing, the films obtain high mobility up to 90 cm(2)/Vs. The films were analyzed in situ by X-ray pho ...

MDPI2015

Increasing Polycrystalline Zinc Oxide Grain Size by Control of Film Preferential Orientation

Christophe Ballif, Aïcha Hessler-Wyser, Sylvain Nicolay, Arthur Brian Aebersold, Cécile Hébert, Duncan Thomas Lindsay Alexander, Lorenzo Fanni, Monica Morales Masis

We investigate the structural evolution of polycrystalline zinc oxide films grown by low pressure metal-organic chemical vapor deposition. The goal is to achieve larger grains-leading to higher charge carrier mobility from lower grain boundary density-by c ...

American Chemical Society2015

Low-Temperature High-Mobility Amorphous IZO for Silicon Heterojunction Solar Cells

Christophe Ballif, Stefaan De Wolf, Jakub Holovsky, Monica Morales Masis

Parasitic absorption in the transparent conductive oxide (TCO) front electrode is one of the limitations of silicon heterojunction (SHJ) solar cells efficiency. To avoid such absorption while retaining high conductivity, TCOs with high electron mobility ar ...

Ieee-Inst Electrical Electronics Engineers Inc2015

Sputtered rear electrode with broadband transparency for perovskite solar cells

Christophe Ballif, Guy Joseph Günter Dubuis, Sylvain Nicolay, Soo-Jin Moon, Arnaud Walter, Stefaan De Wolf, Jérémie Werner, Monica Morales Masis, Björn Niesen, Philipp Friedrich Hermann Löper

Due to their high efficiencies combined with simple and cost-effective device fabrication, perovskite solar cells are promising candidates as top cells in tandem devices. For this application, the perovskite solar cell must be highly transparent at near-in ...

Elsevier2015

Environmental stability of high-mobility indium-oxide based transparent electrodes

Christophe Ballif, Ali Dabirian, Stefaan De Wolf, Monica Morales Masis, Thanaporn Tohsophon

Large-scale deployment of a wide range of optoelectronic devices, including solar cells, critically depends on the long-term stability of their front electrodes. Here, we investigate the performance of Sn-doped In2O3 (ITO), H-doped In2O3 (IO:H), and Zn-dop ...

Amer Inst Physics2015

Tuning the porosity of zinc oxide electrodes: from dense to nanopillar films

Christophe Ballif, Sylvain Nicolay, Lorenzo Fanni, Monica Morales Masis, Benoît Florent Paul Delaup, Björn Niesen

Thin films with tunable porosity are of high interest in applications such as gas sensing and antireflective coatings. We report a facile and scalable method to fabricate ZnO electrodes with tuneable porosity. By adjusting the substrate temperature and rat ...

2015

Tailoring the surface morphology of zinc oxide films for high-performance micromorph solar cells

Christophe Ballif, Laura Ding, Sylvain Nicolay, Lorenzo Fanni, Monica Morales Masis

Self-textured zinc oxide polycrystalline films prepared by metalorganic low-pressure chemical vapor deposition combine excellent transparency, conductivity and light-scattering ability when used as electrodes for high-efficiency thin-film silicon solar cel ...

Elsevier2014

Hydrogen plasma treatment for improved conductivity in amorphous aluminum doped zinc tin oxide thin films

Christophe Ballif, Aïcha Hessler-Wyser, Laura Ding, Sylvain Nicolay, Quentin Thomas Jeangros, Fabien Paul Jacques Dauzou, Monica Morales Masis

Improving the conductivity of earth-abundant transparent conductive oxides (TCOs) remains an important challenge that will facilitate the replacement of indium-based TCOs. Here, we show that a hydrogen (H-2)-plasma post-deposition treatment improves the co ...

Amer Inst Physics2014

Copper and transparent-conductor reflectarray elements on thin-film solar cell Panels

Christophe Ballif, Julien Perruisseau-Carrier, Sylvain Nicolay, Monica Morales Masis

This work addresses the task of integrating reflectarray antennas on thin-film solar cell panels, as a means to save real estate, weight or cost of platforms, such as satellites or transportable autonomous antenna systems. Reflectarray unit cell families, ...

Institute of Electrical and Electronics Engineers2014

c-texture versus a-texture low pressure metalorganic chemical vapor deposition ZnO films: Lower resistivity despite smaller grain size

Christophe Ballif, Laura Ding, Sylvain Nicolay, Arthur Brian Aebersold, Duncan Thomas Lindsay Alexander, Lorenzo Fanni, Monica Morales Masis

Recently, it has been shown that it is possible to tune the morphology of zinc oxide films deposited by low-pressure metalorganic chemical vapor deposition (LP-MOCVD) while preserving good electrical conductivity. Here a closer look is taken at films depos ...

Elsevier2014

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