Publications de Giulia Grancini

Revealing Weak Dimensional Confinement Effects in Excitonic Silver/Bismuth Double Perovskites

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Giulia Grancini, Pascal Alexander Schouwink, Inés Garcia Benito, Albertus Adrian Sutanto

Lead-free perovskites are attracting increasing interest as nontoxic materials for advanced optoelectronic applications. Here, we report on a family of silver/bismuth bromide double perovskites with lower dimensionality obtained by incorporating phenethyla ...

AMER CHEMICAL SOC2022

Two-Step Thermal Annealing: An Effective Route for 15 % Efficient Quasi-2D Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Giulia Grancini, Albertus Adrian Sutanto, Giorgio Schileo, Valentino Romano

Low-dimensional perovskites (LDP) are nowadays recognized as promising materials for the realization of highly performing photovoltaic cells. However, issues related to film morphology, composition, crystal quality and material homogeneity limit the device ...

WILEY-V C H VERLAG GMBH2021

Bi-functional interfaces by poly(ionic liquid) treatment in efficient pin and nip perovskite solar cells

Mohammad Khaja Nazeeruddin, Antonio Abate, Giulia Grancini, Filippo de Angelis, Albertus Adrian Sutanto, Pietro Caprioglio, Christian Michael Wolff

Approaches to boost the efficiency and stability of perovskite solar cells often address one singular problem in a specific device configuration. In this work, we utilize a poly(ionic liquid) (PIL) to introduce a multi-functional interlayer to improve the ...

ROYAL SOC CHEMISTRY2021

Exploring the role of halide mixing in lead-free BZA(2)SnX(4) two dimensional hybrid perovskites

Valentin Ianis Emmanuel Queloz, Giulia Grancini

The role of halide substitution in a lead-free 2D hybrid perovskite is investigated on the BZA(2)SnX(4) (BZA = benzylammonium; X = Cl, Br and I) system, by reporting the synthesis and the structural analysis by means of single-crystal X-ray diffraction dat ...

Royal Society of Chemistry2020

In Situ Analysis Reveals the Role of 2D Perovskite in Preventing Thermal-Induced Degradation in 2D/3D Perovskite Interfaces

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Nikita Drigo, Giulia Grancini, Albertus Adrian Sutanto, Rodrigo Szostak

Engineering 2D/3D perovskite interfaces is a common route to realizing efficient and stable perovskite solar cells. Whereas 2D perovskite’s main function in trap passivation has been identified and is confirmed here, little is known about its 2D/3D interfa ...

American Chemical Society (ACS)2020

Band-bending induced passivation: high performance and stable perovskite solar cells using a perhydropoly(silazane) precursor

Mohammad Khaja Nazeeruddin, Mounir Driss Mensi, Valentin Ianis Emmanuel Queloz, Yonghui Lee, Kyung Taek Cho, Sanghyun Paek, Cristina Roldán Carmona, Aron Joel Huckaba, Giulia Grancini, Yi Zhang, Hiroyuki Kanda, Nadja Isabelle Desiree Klipfel, Mo Li

Surface passivation of the perovskite photo absorber is a key factor to improve the photovoltaic performance. So far robust passivation strategies have not yet been revealed. Here, we demonstrate a successful passivation strategy which controls the Fermi-l ...

2020

Spatial Charge Separation as the Origin of Anomalous Stark Effect in Fluorous 2D Hybrid Perovskites

Jacques-Edouard Moser, Mohammad Khaja Nazeeruddin, Marine Eva Fedora Bouduban, Valentin Ianis Emmanuel Queloz, Giulia Grancini, Inés Garcia Benito, Alexander Fedorovskiy

2D hybrid perovskites (2DP) are versatile materials, whose electronic and optical properties can be tuned through the nature of the organic cations (even when those are seemingly electronically inert). Here, it is demonstrated that fluorination of the orga ...

2020

Fluorination of Organic Spacer Impacts on the Structural and Optical Response of 2D Perovskites

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Tom Theodorus Antonius Lummen, Giulia Grancini, Inés Garcia Benito, Pietro Caprioglio

Low-dimensional hybrid perovskites have triggered significant research interest due to their intrinsically tunable optoelectronic properties and technologically relevant material stability. In particular, the role of the organic spacer on the inherent stru ...

2020

Green-Emitting Lead-Free Cs4SnBr6 Zero-Dimensional Perovskite Nanocrystals with Improved Air Stability

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Tom Theodorus Antonius Lummen, Giulia Grancini

We report the synthesis and characterization of nanocrystals of a novel fully inorganic lead-free zero-dimensional perovskite, Cs4SnBr6. Samples are made of crystals with an average size of similar to 20 nm with green emission centered around 530 nm. Inter ...

2020

Dynamical evolution of the 2D/3D interface: a hidden driver behind perovskite solar cell instability

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Kyung Taek Cho, Sanghyun Paek, Nikita Drigo, Giulia Grancini, Pascal Alexander Schouwink, Inés Garcia Benito, Albertus Adrian Sutanto

Engineering two-/three-dimensional (2D/3D) perovskite solar cells is nowadays a popular strategy for efficient and stable devices. However, the exact function of the 2D/3D interface in controlling the long-term device behavior is still obscure. Here, we re ...

Royal Society of Chemistry2020

Auto-passivation of crystal defects in hybrid imidazolium/methylammonium lead iodide films by fumigation with methylamine affords high efficiency perovskite solar cells

Mohammad Khaja Nazeeruddin, Rosario Scopelliti, Paul Joseph Dyson, Zhaofu Fei, Emad Oveisi, Farzaneh Fadaei Tirani, Erfan Shirzadi, Giulia Grancini, Yi Zhang, Xuehui Liu

Hybrid perovskite solar cells have attracted tremendous interest in the photovoltaic community. Despite their high defect tolerance, reducing the trap density by material engineering and surface modification is still critical to further boost performance. ...

Elsevier2019

Crystal Orientation Drives the Interface Physics at Two/Three-Dimensional Hybrid Perovskites

Jacques-Edouard Moser, Mohammad Khaja Nazeeruddin, Marine Eva Fedora Bouduban, Valentin Ianis Emmanuel Queloz, Kyung Taek Cho, Sanghyun Paek, Cristina Roldán Carmona, Giulia Grancini

Combining halide perovskites with tailored dimensionality into two/three-dimensional (2D/3D) systems has revealed a powerful strategy to boost the performances of perovskite photovoltaics (PVs). Despite recent advances, a clear understanding of the intimat ...

2019

Dimensional tailoring of hybrid perovskites for photovoltaics

Mohammad Khaja Nazeeruddin, Giulia Grancini

Hybrid perovskites are currently one of the most active fields of research owing to their enormous potential for photovoltaics. The performance of 3D hybrid organic-inorganic perovskite solar cells has increased at an incredible rate, reaching power conver ...

2019

Copper sulfide nanoparticles as hole-transporting-material in a fully-inorganic blocking layers n-i-p perovskite solar cells: Application and working insights

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Cristina Roldán Carmona, Giulia Grancini

One of the challenges in the field of perovskite solar cells (PSC) is the development of inorganic hole-transporting-materials (HTM) suitable for solution-processed deposition, in order to have cheaper, more stable and scalable devices. Herein, we report t ...

2019

Saddle-like, π-conjugated, cyclooctatetrathiophene-based, hole-transporting material for perovskite solar cells

Mohammad Khaja Nazeeruddin, Iwan Zimmermann, Giulia Grancini, Inés Garcia Benito, Javier Urieta Mora

A flexible, saddle-like, π-conjugated skeleton composed of four fused thiophene rings forming a cyclooctatetrathiophene (CoTh) with four triphenylamines (CoTh-TTPA) is presented as a hole-transporting material (HTM) for perovskite solar cells. The new HTM ...

Royal Society of Chemistry2019

Non‐Planar and Flexible Hole‐Transporting Materials from Bis‐Xanthene and Bis‐Thioxanthene Units for Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Iwan Zimmermann, Giulia Grancini

Two new hole‐transporting materials (HTMs), BX‐OMeTAD and BTX‐OMeTAD , based on xanthene and thioxanthene units, respectively, and bearing p ‐methoxydiphenylamine peripheral groups, are presented for their use in perovskite solar cells (PSCs). The novelty ...

Wiley-VHCA AG2019

Improved efficiency and reduced hysteresis in ultra-stable fully printable mesoscopic perovskite solar cells through incorporation of CuSCN into the perovskite layer

Mohammad Khaja Nazeeruddin, Paul Gratia, Iwan Zimmermann, Giulia Grancini

Fully printable hole transport layer-free mesoscopic perovskite solar cells have proven excellent long-term stability and are therefore promising candidates for scale-up to larger modules required for the commercialization of the perovskite photovoltaic te ...

Royal Society of Chemistry2019

Pushing the limit of Cs incorporation into FAPbBr3 perovskite to enhance solar cells performances

Mohammad Khaja Nazeeruddin, Valentin Ianis Emmanuel Queloz, Berend Smit, Giulia Grancini, Olga Syzgantseva, Inés Garcia Benito, Albertus Adrian Sutanto

Cation compositional engineering has revealed a powerful design tool to manipulate the perovskite structural and optoelectronic characteristics with a tremendous impact on device performances. Tuning the bandgap by cation and anion compositional mixing, fo ...

2018

Selective growth of layered perovskites for stable and efficient photovoltaics

Mohammad Khaja Nazeeruddin, Manuel Tschumi, Emad Oveisi, Yonghui Lee, Kyung Taek Cho, Sanghyun Paek, Giulia Grancini, Pascal Alexander Schouwink

Perovskite solar cells (PSCs) are promising alternatives toward clean energy because of their high-power conversion efficiency (PCE) and low materials and processing cost. However, their poor stability under operation still limits their practical applicati ...

2018

Fashioning Fluorous Organic Spacers for Tunable and Stable Layered Hybrid Perovskites

Mohammad Khaja Nazeeruddin, Andreas Stephan Lesch, Valentin Ianis Emmanuel Queloz, Iwan Zimmermann, Giulia Grancini, Inés Garcia Benito

2018