@article{Scalon2024c,

title = {2D Phase Formation on 3D Perovskite: Insights from Molecular Stiffness},

author = {Lucas Scalon and Charles Alves Nogueira and André Felipe Vale Fonseca and Paulo E. Marchezi and Raphael Fernando Moral and Giulia Grancini and Tim Kodalle and Carolin M. Sutter-Fella and Caio Costa Oliveira and Luiz F. Zagonel and Ana F. Nogueira},

url = {https://doi.org/10.1021/acsami.4c11394},

doi = {10.1021/acsami.4c11394},

isbn = {1944-8244},

year  = {2024},

date = {2024-09-13},

urldate = {2024-09-13},

journal = {ACS Applied Materials and Interfaces},

abstract = {Several studies have demonstrated that low-dimensional structures (e.g., two-dimensional (2D)) associated with three-dimensional (3D) perovskite films enhance the efficiency and stability of perovskite solar cells. Here, we aim to track the formation sites of the 2D phase on top of the 3D perovskite and to establish correlations between molecular stiffness and steric hindrance of the organic cations and their influence on the formation and crystallization of 2D/3D. Using cathodoluminescence combined with a scanning electron microscopy technique, we verified that the formation of the 2D phase occurs preferentially on the grain boundaries of the 3D perovskite. This helps explain some passivation mechanisms conferred by the 2D phase on 3D perovskite films. Furthermore, by employing in situ grazing-incidence wide-angle X-ray scattering, we monitored the formation and crystallization of the 2D/3D perovskite using three cations with varying molecular stiffness. In this series of molecules, the formation and crystallization of the 2D phase are found to be dependent on both steric hindrance around the ammonium group and molecular stiffness. Finally, we employed a 2D/3D perovskite heterointerface in a solar cell. The presence of the 2D phase, particularly those formed from flexible cations, resulted in a maximum power conversion efficiency of 21.5%. This study provides insight into critical aspects related to how bulky organic cations’ stiffness and steric hindrance influence the formation, crystallization, and distribution of 2D perovskite phases.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Fonseca2024b,

title = {\textit{In Situ} PL Tracking of Halide Exchange at 3D/QD Heterojunction Perovskite Solar Cells},

author = {André F. V. Fonseca and Lucas Scalon and Brener R. C. Vale and Maria G. D. Guaita and Jefferson Bettini and Zeno C. Brandão and Luiz F. Zagonel and Lázaro A. Padilha and Ana F. Nogueira},

doi = {10.1021/acsenergylett.4c01268},

issn = {2380-8195},

year  = {2024},

date = {2024-06-14},

journal = {ACS Energy Lett.},

volume = {9},

number = {6},

pages = {3177--3186},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Scalon2024,

title = {Understanding and Controlling the Photoluminescence Line Shapes of 2D Perovskites with Chiral Methylbenzylammonium-Based Cations},

author = {Lucas Scalon and Arianne New and Ziyuan Ge and Navendu Mondal and Raquel Dantas Campos and Claudio Quarti and David Beljonne and Ana Flávia Nogueira and Artem A. Bakulin and Yana Vaynzof},

doi = {10.1021/acs.chemmater.3c03234},

issn = {1520-5002},

year  = {2024},

date = {2024-05-14},

journal = {Chem. Mater.},

volume = {36},

number = {9},

pages = {4331--4342},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Scalon2024b,

title = {Understanding and Controlling the Photoluminescence Line Shapes of 2D Perovskites with Chiral Methylbenzylammonium-Based Cations},

author = {Lucas Scalon and Arianne New and Ziyuan Ge and Navendu Mondal and Raquel Dantas Campos and Claudio Quarti and David Beljonne and Ana Flávia Nogueira and Artem A. Bakulin and Yana Vaynzof},

doi = {10.1021/acs.chemmater.3c03234},

issn = {1520-5002},

year  = {2024},

date = {2024-05-14},

journal = {Chem. Mater.},

volume = {36},

number = {9},

pages = {4331--4342},

publisher = {American Chemical Society (ACS)},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Mota2024,

title = {Effect of different side chains on alternating copolymers of benzodithiophene and thiophene in organic solar cells},

author = {Isabela Custódio Mota and Jonathan Rubio Arias and Francineide Lopes de Araújo and Ana Flávia Nogueira and Maria de Fátima Vieira Marques},

doi = {10.1002/app.55283},

issn = {1097-4628},

year  = {2024},

date = {2024-05-05},

journal = {J of Applied Polymer Sci},

volume = {141},

number = {17},

publisher = {Wiley},

abstract = {AbstractPolymeric semiconductors offer the dual advantages of lightness and flexibility, facilitating the large‐scale production of organic electronic devices. In the present research, electron donor polymers were synthesized incorporating high electron density aromatic units, specifically benzodithiophene (BDT) and thiophene (Th), to explore their efficacy in organic electronics. This systematic study focused on evaluating the impact of varying side chains on the material properties of these polymers. It was found that polymers with Th side chains exhibited significantly enhanced thermal stability, approximately 100°C higher than their alkoxide side chain counterparts. For the polymer PEHO‐BDT3HT, a bandgap value of around 1.6 eV was obtained. Furthermore, binary devices were developed using these novel copolymers, among which PDT‐BDT3HT demonstrated superior photovoltaic performance, achieving a power conversion efficiency of 1.56% without any optimization. This work not only sheds light on the influence of side chain variations in polymer properties but also showcases the potential of BDT and Th‐based copolymers in the field of organic electronics.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{DinizAraújo2024,

title = {Fullerene-C_{60} and PCBM as interlayers in regular and inverted lead-free PSCs using CH_{3}NH_{3}SnI_{3}: an analysis of device performance and defect density dependence by SCAPS-1D},

author = {Vívian Helene Diniz Araújo and Ana Flávia Nogueira and Juliana Cristina Tristão and Leandro José dos Santos},

doi = {10.1039/d4ra00634h},

issn = {2046-2069},

year  = {2024},

date = {2024-04-03},

journal = {RSC Adv.},

volume = {14},

number = {16},

pages = {10930--10941},

publisher = {Royal Society of Chemistry (RSC)},

abstract = {The use of fullerene-C60 and PCBM as interlayers in lead-free PSCs can positively impact the optimized parameters of these solar cells. The simulation program SCAPS-1D was used to simulate inverted and regular PSCs using interlayers in MASI PSCs.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}

@article{Scalon2023,

title = {Tuning Phase Purity in Chiral 2D Perovskites},

author = {Lucas Scalon and Julius Brunner and Maria Gabriella Detone Guaita and Rodrigo Szostak and Miguel Albaladejo‐Siguan and Tim Kodalle and L. Andrés Guerrero‐León and Carolin M. Sutter‐Fella and Caio C. Oliveira and Yana Vaynzof and Ana Flavia Nogueira},

doi = {10.1002/adom.202300776},

issn = {2195-1071},

year  = {2024},

date = {2024-01-00},

journal = {Advanced Optical Materials},

volume = {12},

number = {2},

publisher = {Wiley},

abstract = {AbstractThe introduction of chiral organic spacers in low‐dimensional metal‐halide perovskites triggers chiroptical activity, which is appealing for spintronic applications. However, a comprehensive understanding of structure formation and the ability to control phase purity in such materials have yet to be developed. Herein, the impact of processing conditions on the phase purity, microstructure, and chiroptical properties of chiral 2D perovskites is explored. The anisotropic emergence of a 1D perovskite inside the 2D matrix and its dependence on the organic cation chirality, solvent, and thermal annealing conditions are shown. By controlling these parameters, the in‐plane conductivity of the films is nearly doubled. Furthermore, it is demonstrated, for the first time, that solvent choice and the spatial configuration of the organic cation can have an impact on the residual lattice strain and the energetic disorder of the system. The fundamentals presented here can help to improve the film deposition methods for low‐dimensional chiral perovskites, offering strategies to control phase purity.},

keywords = {},

pubstate = {published},

tppubtype = {article}

}