Publications by Marius Franckevicius

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

Molecular Design and Operational Stability: Toward Stable 3D/2D Perovskite Interlayers

Mohammad Khaja Nazeeruddin, Pascal Alexander Schouwink, Anne-Clémence Corminboeuf, Sanghyun Paek, Kyung Taek Cho, Cristina Roldán Carmona, Hiroyuki Kanda, Marius Franckevicius, Hobeom Kim, Kun-Han Lin

Despite organic/inorganic lead halide perovskite solar cells becoming one of the most promising next-generation photovoltaic materials, instability under heat and light soaking remains unsolved. In this work, a highly hydrophobic cation, perfluorobenzylamm ...

2020

Doped but Stable: Spirobisacridine Hole Transporting Materials for Hysteresis-Free and Stable Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Pascal Alexander Schouwink, Anne-Clémence Corminboeuf, Sanghyun Paek, Cristina Roldán Carmona, Albertus Adrian Sutanto, Hobeom Kim, Marius Franckevicius, Kun-Han Lin, Nikita Drigo

Four spirobisacridine (SBA) hole-transporting materials were synthesized and employed in perovskite solar cells (PSCs). The molecules bear electronically inert alkyl chains of different length and bulkiness, attached to in-plane N atoms of nearly orthogona ...

AMER CHEMICAL SOC2020

Retarding Thermal Degradation in Hybrid Perovskites by Ionic Liquid Additives

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

Perovskite Solar Cells: 18% Efficiency Using Zn(II) and Cu(II) Octakis(diarylamine)phthalocyanines as Hole-Transporting Materials

Mohammad Khaja Nazeeruddin, Sanghyun Paek, Kyung Taek Cho, Kasparas Rakstys, Hiroyuki Kanda, Valentin Ianis Emmanuel Queloz, Marius Franckevicius

Metallophthalocyanines (MPcs) are currently emerging as alternative hole-transporting materials (HTMs) in perovskite solar cells (PSCs). However, the lack of systematic structure/photovoltaic properties investigations still hampers the rational design of M ...

2019

Electroluminescence Dynamics in Perovskite Solar Cells Reveals Giant Overshoot Effect

Wolfgang Richard Tress, Marius Franckevicius

High performance of both photovoltaic and electroluminescent devices requires low nonradiative recombination losses. In perovskites, such loses strongly depend on the carrier traps related to the mobile ions and vacancies, causing I-V hysteresis of solar c ...

AMER CHEMICAL SOC2019

High photovoltage in perovskite solar cells: New physical insights from the ultrafast transient absorption spectroscopy

Michael Graetzel, Shaik Mohammed Zakeeruddin, Mohammad Ibrahim Dar, Neha Arora, Marius Franckevicius

To understand the cause of the high open circuit photovoltage (VOC) achieved by todays' state of the art perovskite solar cells (PSCs), we examine formamidinium lead bromide CH(NH2)(2)PbBr3 films by ultrafast transient absorption spectroscopy (TAS). By usi ...

Elsevier2017

Multistep Photoluminescence Decay Reveals Dissociation of Geminate Charge Pairs in Organolead Trihalide Perovskites

Shaik Mohammed Zakeeruddin, Marius Franckevicius

Charge carrier dynamics in organolead iodide perovskites is analyzed by employing time-resolved photoluminescence spectroscopy with several ps time resolution. The measurements performed by varying photoexcitation intensity over five orders of magnitude en ...

Wiley-VCH Verlag Berlin2017

Ionic polarization-induced current–voltage hysteresis in CH3NH3PbX3 perovskite solar cells

Michael Graetzel, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Ursula Röthlisberger, Wolfgang Richard Tress, Peng Gao, Michael Saliba, Simone Meloni, Thomas Moehl, Yonghui Lee

CH3NH3PbX3 (MAPbX(3)) perovskites have attracted considerable attention as absorber materials for solar light harvesting, reaching solar to power conversion efficiencies above 20%. In spite of the rapid evolution of the efficiencies, the understanding of b ...

Nature Research2016

High-Efficiency Perovskite Solar Cells Employing a S,N-Heteropentacene-based D-A Hole-Transport Material

Michael Graetzel, Dongqin Bi, Mohammad Khaja Nazeeruddin, Shaik Mohammed Zakeeruddin, Ulf Anders Hagfeldt, Peng Gao, Marius Franckevicius, Amaresh Mishra

We developed a new donor--acceptor-type hole-transport material (HTMs) incorporating S,N-heteropentacene as -spacer, triarylamine as donor, and dicyanovinylene as acceptor. In addition to appropriate frontier molecular orbital energies, the new HTM showed ...

Wiley-V C H Verlag Gmbh2016