Publications de Cristina Roldán Carmona

C-60 Thin Films in Perovskite Solar Cells: Efficient or Limiting Charge Transport Layer?

Mohammad Khaja Nazeeruddin, Cristina Roldán Carmona, Hiroyuki Kanda, Albertus Adrian Sutanto, Cansu Igci, Nadja Isabelle Desiree Klipfel, Maria Cristina Momblona Rincón

In this work, we identify the importance of C-60 and compact-TiO2 (cTiO(2)) as electron transport layers on the device performance of coevaporated n-i-p perovskite solar cells. We found (1) a synergetic effect between both layers when extracting the charge ...

AMER CHEMICAL SOC2022

Cation optimization for burn-in loss-free perovskite solar devices

Mohammad Khaja Nazeeruddin, Sanghyun Paek, Tom Theodorus Antonius Lummen, Cristina Roldán Carmona, Marius Franckevicius, Olga Syzgantseva

Hybrid lead halide perovskites will potentially lead the future energy scenario if highly efficient cells have long-term stability. Here we combine state-of-the art mixed-cation formulations containing formamidinium (FA) and methylammonium (MA), with optim ...

Royal Society of Chemistry2021

Mechanistic Insights into the Role of the Bis(trifluoromethanesulfonyl) imide Ion in Coevaporated p-i-n Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Mounir Driss Mensi, Klaus Leifer, Cristina Roldán Carmona, Hiroyuki Kanda, Albertus Adrian Sutanto, Cansu Igci, Nadja Isabelle Desiree Klipfel, Keith Gregory Brooks

Hybrid lead halide perovskites have reached comparable efficiencies to state-of-the-art silicon solar cell technologies. However, a remaining key challenge toward commercialization is the resolution of the perovskite device instability. In this work, we id ...

2021

Crystallographically Oriented Hybrid Perovskites via Thermal Vacuum Codeposition

Mohammad Khaja Nazeeruddin, Mounir Driss Mensi, Yen-Cheng Liu, Cristina Roldán Carmona, Hiroyuki Kanda, Nadja Isabelle Desiree Klipfel, Cheng Liu, Maria Cristina Momblona Rincón

Hybrid lead halide perovskites typically form polycrystalline films that have multiple grain sizes and surface defects. A key engineering challenge toward commercialization is therefore the production of homogeneous, defect-free largearea devices achieving ...

2021

Interfacial passivation of wide-bandgap perovskite solar cells and tandem solar cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Cristina Roldán Carmona, Hiroyuki Kanda

Perovskite/silicon tandem solar cells offer the potential to surpass the power conversion efficiency (PCE) of single-junction solar devices beyond the Shockley-Queisser limit at relatively low costs. However, obtaining wide-bandgap materials that provide i ...

Royal Society of Chemistry2021

Cation optimization for burn-in loss-free perovskite solar devices (vol 9, pg 5374, 2021)

Mohammad Khaja Nazeeruddin, Sanghyun Paek, Cristina Roldán Carmona

Royal Society of Chemistry2021

An Efficient Approach to Fabricate Air-Stable Perovskite Solar Cells via Addition of a Self-Polymerizing Ionic Liquid

Mohammad Khaja Nazeeruddin, Zhaofu Fei, Paul Joseph Dyson, Nikita Drigo, Rosario Scopelliti, Tom Theodorus Antonius Lummen, Farzaneh Fadaei Tirani, Yi Zhang, Cristina Roldán Carmona, Valentin Ianis Emmanuel Queloz

Despite the excellent photovoltaic properties achieved by perovskite solar cells at the laboratory scale, hybrid perovskites decompose in the presence of air, especially at high temperatures and in humid environments. Consequently, high-efficiency perovski ...

Wiley2020

Applications of Self-Assembled Monolayers for Perovskite Solar Cells Interface Engineering to Address Efficiency and Stability

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Cristina Roldán Carmona, Muhammad Sohail

Due to a certified 25.2% high efficiency, low cost, and easy fabrication; perovskite solar cells (PSCs) are the focus of interest among the next-generation photovoltaic technologies. Long-term stability is one of the most challenging obstacles to bring tec ...

2020

Universal approach toward high-efficiency two-dimensional perovskite solar cells via a vertical-rotation process

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Pascal Alexander Schouwink, Yong Ding, Filippo de Angelis, Cristina Roldán Carmona, Mo Li, Cheng Liu

The emerging 2D perovskites exhibit superior stability and similar optoelectronic attributes compared to the 3D analogues, but their strong exciton-binding energy and inferior interlayer charge-transport reduce dramatically the device performance. Herein, ...

2020

Azatruxene-Based, Dumbbell-Shaped, Donor-pi-Bridge-Donor Hole-Transporting Materials for Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Inés Garcia Benito, Cristina Roldán Carmona, Cansu Igci, Tom Theodorus Antonius Lummen, Javier Urieta Mora

Three novel donor-pi-bridge-donor (D-pi-D) hole-transporting materials (HTMs) featuring triazatruxene electron-donating units bridged by different 3,4-ethylenedioxythiophene (EDOT) pi-conjugated linkers have been synthesized, characterized, and implemented ...

2020