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Cristina Roldán Carmona

Cette personne n’est plus à l’EPFL

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Publications associées (44)

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

Application of a Tetra-TPD-Type Hole-Transporting Material Fused by a Troger's Base Core in Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Cristina Roldán Carmona, Rui Xia, Maria Cristina Momblona Rincón

One of the obstacles to the commercialization of perovskite solar cells (PSCs) is the high price and morphological instability of the most common hole-transporting material (HTM) Spiro-OMeTAD. Herein, a novel HTM, termed V1160, based on four N,N '-bis(3-me ...

WILEY-V C H VERLAG GMBH2019

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

Retarding Thermal Degradation in Hybrid Perovskites by Ionic Liquid Additives

Mohammad Khaja Nazeeruddin, Mounir Driss Mensi, Paul Joseph Dyson, Zhaofu Fei, Felix Daniel Bobbink, Marius Franckevicius, Cristina Roldán Carmona, Nikita Drigo, Zhangjun Huang, Rui Xia

Recent years have witnessed considerable progress in the development of solar cells based on lead halide perovskite materials. However, their intrinsic instability remains a limitation. In this context, the interplay between the thermal degradation and the ...

2019

Inexpensive Hole-Transporting Materials Derived from Troger's Base Afford Efficient and Stable Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Cristina Roldán Carmona, Rui Xia, Maria Cristina Momblona Rincón

The synthesis of three enamine hole-transporting materials (HTMs) based on Troger's base scaffold are reported. These compounds are obtained in a three-step facile synthesis from commercially available materials without the need of expensive catalysts, ine ...

Wiley-VCH Verlag GmbH2019

Introduction of a Bifunctional Cation Affords Perovskite Solar Cells Stable at Temperatures Exceeding 80 degrees C

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Cristina Roldán Carmona, Erfan Shirzadi, Filippo de Angelis

Perovskite solar cells (PSCs) with high efficiencies have been reported in recent years. Consequently, the main obstacle that hinders their commercialization is their poor thermal stability. Here, we describe the introduction of an A-site cation (2-choloro ...

AMER CHEMICAL SOC2019

Picosecond Capture of Photoexcited Electrons Improves Photovoltaic Conversion in MAPbI3 :C70 -Doped Planar and Mesoporous Solar Cells

Mohammad Khaja Nazeeruddin, Grégoire Clément Gschwend, Cristina Roldán Carmona, Giulia Grancini, Saba Gharibzadeh

Wiley2018

Surface passivation of perovskite layers using heterocyclic halides: Improved photovoltaic properties and intrinsic stability

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona

Elsevier2018

Low-Cost TiS2 as Hole-Transport Material for Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Yonghui Lee, Cristina Roldán Carmona, Aron Joel Huckaba, Giulia Grancini, Saba Gharibzadeh

2018

Influence of Charge Transport Layers on Open-Circuit Voltage and Hysteresis in Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Yonghui Lee, Cristina Roldán Carmona, Giulia Grancini, Saba Gharibzadeh

2018

Metal-Halide Perovskites for Gate Dielectrics in Field-Effect Transistors and Photodetectors Enabled by PMMA Lift-Off Process

Mohammad Khaja Nazeeruddin, Konrad Domanski, Cristina Roldán Carmona

Wiley2018

Highly efficient perovskite solar cells with a compositionally engineered perovskite/hole transporting material interface

Mohammad Khaja Nazeeruddin, Peng Gao, Yonghui Lee, Kyung Taek Cho, Sanghyun Paek, Cristina Roldán Carmona, Giulia Grancini

Perovskite solar cells (PSCs) have experienced an outstanding advance in power conversion efficiency (PCE) by optimizing the perovskite layer morphol., compn., interfaces, and charge collection efficiency. To enhance PCE, here we developed a new method i.e ...

Royal Soc Chemistry2017

One-Year stable perovskite solar cells by 2D/3D interface engineering

Michael Graetzel, Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona, Iwan Zimmermann, Giulia Grancini, Filippo de Angelis

Despite the impressive photovoltaic performances with power conversion efficiency beyond 22%, perovskite solar cells are poorly stable under operation, failing by far the market requirements. Various technological approaches have been proposed to overcome ...

Nature Publishing Group2017

Molecularly Engineered Phthalocyanines as Hole-Transporting Materials in Perovskite Solar Cells Reaching Power Conversion Efficiency of 17.5%

Mohammad Khaja Nazeeruddin, Paul Gratia, Peng Gao, Kyung Taek Cho, Cristina Roldán Carmona, Giulia Grancini, Olga Trukhina

Easily accessible tetra-5-hexylthiophene-, tetra-5-hexyl-2,2'-bisthiophene-substituted zinc phthalocyanines (ZnPcs) and tetra-tert-Bu ZnPc are employed as hole-transporting materials in mixed-ion perovskite [HC(NH2)2]0.85(CH3NH3)0.15Pb(I0.8 ...

2017

Large guanidinium cation mixed with methylammonium in lead iodide perovskites for 19% efficient solar cells

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona, Giulia Grancini

Organic–inorganic lead halide perovskites have shown photovoltaic performances above 20% in a range of solar cell architectures while offering simple and low-cost processability. Despite the multiple ionic compositions that have been reported so far, the p ...

2017

Copper Thiocyanate Inorganic Hole-Transporting Material for High-Efficiency Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona, Iwan Zimmermann, Giulia Grancini

In this Letter we show that the mixed perovskite in the form of (FAPbI(3))(0.85)(MAPbBr(3))(0.15) in combination with CuNCS as p-type hole conductor leads to over 16% power conversion efficiency (PCE) under full sun illumination and yields a remarkable mon ...

Amer Chemical Soc2016

Ruthenium phenanthroimidazole complexes for near infrared light-emitting electrochemical cells

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona

By adding different electron donor moieties to the ancillary ligand in ruthenium(II) phenanthroimidazole complexes, we successfully designed near infrared light emitting complexes suitable for light emitting electro-chemical cells (LECs). By using a single ...

Royal Society of Chemistry2016

Low-voltage, high-brightness and deep-red light-emitting electrochemical cells (LECs) based on new ruthenium(II) phenanthroimidazole complexes

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona

Light-Emitting Electrochemical Cells (LECs) with a simple device structure ITO/Ru complex/Ga: In were prepared by using heteroleptic ruthenium(II) complexes containing 2-(2-hydroxyphenyl)-1(4-bromophenyl)-1h-imidazo[4,5-f][1,10] phenanthroline (hpbpip) as ...

Royal Society of Chemistry2016

Benzotrithiophene-Based Hole-Transporting Materials for 18.2% Perovskite Solar Cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Paul Gratia, Sadig Aghazada, Cristina Roldán Carmona, Iwan Zimmermann, Inés Garcia Benito

New star-shaped benzotrithiophene (BTT)-based hole-transporting materials (HTM) BTT-1, BTT-2 and BTT-3 have been obtained through a facile synthetic route by crosslinking triarylamine-based donor groups with a benzotrithiophene (BTT) core. The BTT HTMs wer ...

Wiley-VCH Verlag GmbH2016

Enhanced TiO2/MAPbI(3) Electronic Coupling by Interface Modification with PbI2

Mohammad Khaja Nazeeruddin, Paul Gratia, Cristina Roldán Carmona, Iwan Zimmermann, Giulia Grancini, Filippo de Angelis

Amer Chemical Soc2016

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