Monica Morales Masis

Cette personne n’est plus à l’EPFL

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Publications associées (39)

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

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

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

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, Benoît Florent Paul Delaup, Björn Niesen, Monica Morales Masis, Lorenzo Fanni

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

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, Quentin Thomas Jeangros, Sylvain Nicolay, Laura Ding, Monica Morales Masis, Fabien Paul Jacques Dauzou

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

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

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

Elsevier2014

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

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

Ieee-Inst Electrical Electronics Engineers Inc2015