Paulo Ernesto Marchezi

Paulo Ernesto Marchezi
Karlstads Universitet · Department of Engineering and Physics

PhD
Postdoctoral Researcher

About

25
Publications
5,472
Reads
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201
Citations
Introduction
I am a chemist, PhD in physical chemistry, who seeks to develop new/trending materials and comprehend their characteristics at their atomic/molecular level. Given the complex and interdisciplinary characteristic of this field, I use several techniques to realize my investigations, including synchrotron-based experiments. Within those techniques, I currently give special attention to in-situ environmental scanning electron microscopy and atomic force microscopy experiments.
Additional affiliations
July 2015 - June 2020
University of Campinas
Position
  • PhD Student
Description
  • PhD project focused in study how the device interfaces influence in the stability of perovskite solar cells and, also, develop strategies to improve it with graphene and graphene oxide based composites.
March 2012 - July 2015
University of Campinas
Position
  • Master's Student
Description
  • MSc project focused in develop graphene oxide gel composite electrolytes for dye sensitized solar cells.
Education
March 2012 - July 2015
University of Campinas
Field of study
  • Materials Chemistry

Publications

Publications (25)
Article
Using in situ photoluminescence measurements during the spin‐coating and annealing steps, this study probes the formation of 2D layers on 3D triple cation perovskite films comparing phenylethylammonium and 2‐thiophenemethylammonium iodide bulky cations. This study elucidates the formation mechanisms of the surface layers for both cases and reveals...
Article
In this work, it is proposed that, upon light incidence, a halide segregation event takes place, where iodine anions move towards the hills of a wrinkled mixed-halide perovskite.
Article
Full-text available
Sustainable energy generation has been a growing concern worldwide due to the alarming effects of climate changes in the last few decades. In this scenario, perovskite solar cells hold great promise in contributing for a greener global energy matrix. Despite the great potential of this technology, several difficulties to deploy perovskite solar pan...
Article
Full-text available
Perovskite solar cells (PSCs) technology is now reaching its full potential in terms of power conversion efficiency, but still presenting problems related to long‐term stability under operating conditions. One of the most promising alternatives to PSCs is the layered PSCs (2D‐PSCs). Layered perovskites present a huge compositional variety, which ca...
Article
Full-text available
The optoelectronic properties, morphology, and consequently the performance of metal halide perovskite solar cells are directly related to the crystalline phases and intermediates formed during film preparation. The gas quenching method is compatible with large-area deposition, but an understanding of how this method influences these properties and...
Article
Mixed halide perovskites of the type Cs x FA 1-x Pb(Br y I 1-y ) 3 are promising materials for highly efficient single junction and tandem solar cells. This work details how RGO interacts with the perovskite, influencing film...
Article
Correction for ‘Reduced graphene oxide in perovskite solar cells: the influence on film formation, photophysics, performance, and stability’ by Paulo Ernesto Marchezi et al. , J. Mater. Chem. C , 2021, DOI: 10.1039/D1TC01360B.
Article
Many multication perovskites for highly stable and efficient solar cells benefit from rubidium iodide introduced in the precursor solution. It is well known that Rb+ influences positively the optoelectronic and mobility properties and has a direct effect upon crystallization and halide homogenization. As Rb+ is often incorporated by adding RbI in t...
Article
The incorporation of a well-established copolymer based on poly (ethylene oxide) was investigated towards maximizing the stability of perovskite solar cells based on methylammonium lead iodide (MAPbI3) Poly (ethylene oxide-co-epichlorohydrin) P(EO/EP) was chosen as an additive to the precursor solution to minimize the degradation process under ambi...
Article
Full-text available
Engineering 2D/3D perovskite interfaces is a common route to realize efficient and stable perovskite solar cells. While the 2D perovskite function mainly as trap passivant has been identified and here confirmed, little is known on the 2D/3D interface properties under thermal stress, despite being one of the main factors inducing device instability....
Article
Multicomponent perovskites of the type CsxFA1-xPb(BryI1-y)3 are good candidates for high efficient perovskite and tandem solar cells. In this work the degradation mechanims of these multicomponent films were investigated and our results show that the degradation is a complex process, with the formation of a number of intermediates and lead-based pr...
Article
In article no. 1900199, Ana F. Nogueira and co‐workers modify perovskite surfaces with alkylammonium chloride, which increases the stability of the solar cells, making it last longer when exposed to environmental conditions. After the modification, 2D/3D structures are formed and their chemical structures are identified. This mixture makes the film...
Article
Two dipyrrolo[2,3-b:2′,3′-e]pyrazine-2,6(1H,5H)-dione (PzDP)-based small molecules DPDV and DPEV with PzDP as the core building block and 4,5-dicyano-2-vinylimdazole (vinazene) as end-cap units were synthesized by Heck coupling reaction. The photophysical, electrochemical properties of DPDV and DPEV were investigated and applied as non-fullerene ac...
Article
Hybrid organic and inorganic perovskite solar cells suffer from the lack of long‐term stability and this negatively impacts the widespread application of this emerging and promising photovoltaic technology. In this work, aiming to increase the stability of perovskite films based on CH3NH3PbI3 and to deep understand the formation of 2D structures, s...
Article
Antisolvent methods - solvent engineering and Lewis base adduct - are the most used to prepare high efficient perovskite solar cells (PSCs). These two methods differ only by the ratio between perovskite (PVSK) and dimethyl sulfoxide (DMSO). In this study, the difference among these two methods and the effect of the relative humidity (rH) on the cry...
Article
A new fullerene derivative, PC61BNI, was designed and synthesized in which [6,6]-phenyl C61-butyric acid methyl ester (PC61BM) was modified by replacing the methyl group with 1,8-naphthalimide (NI) to investigate the molecular structure modification effect on perovskite solar cell performance. Inverted perovskite solar cells were fabricated employi...
Article
Full-text available
Perovskite solar cells (PSC) have been extensively studied over the past few years in both academia and industry. Despite their appeal as a low cost and ease processing PV-technology, PSC still rely on materials that are expensive, turning the large-scale production more challenging. In this work, polyaniline (PAni) and its derivative poly(o-methox...
Chapter
Full-text available
The Future of Semiconductor Oxides in Next-Generation Solar Cells begins with several chapters covering the synthesis of semiconductor oxides for NGSCs. Part II goes on to cover the types and applications of NGSCs currently under development, while Part III brings the two together, covering specific processing techniques for NGSC construction. Fin...
Article
One of the major drawbacks in dye-sensitized solar cells (DSSC) is related to the use of a liquid electrolyte, which limits durability and stability. Part of this problem can be solved by replacing the liquid electrolyte by a polymer or gel electrolyte, although the open circuit potential (VOC) of the solar cells is affected. In this work, the role...

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