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Tom Theodorus Antonius Lummen

Cette personne n’est plus à l’EPFL

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Publications associées (61)

Development of an inorganic cesium carbonate-based electron transport material for a 17% power conversion efficiency perovskite solar cell device

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Iwan Zimmermann, Brahim Aissa

A low-temperature solution process technique is employed to develop an inorganic cesium carbonate (Cs2CO3) as an electron transport material for inorganic-organic hybrid double cation (FAPbI(3))(0.85)(MAPbBr(3))(0.15) perovskite solar cells, as an alternat ...

2020

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

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

alpha-CsPbI(3)Bilayers via One-Step Deposition for Efficient and Stable All-Inorganic Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Olga Syzgantseva, Yong Ding, Cheng Liu, Xianfu Zhang

The emerging inorganic CsPbI(3)perovskites are promising wide-bandgap materials for application in tandem solar cells, but they tend to transit from a black alpha phase to a yellow delta phase in ambient conditions. Herein, a gradient grain-sized (GGS) CsP ...

Wiley2020

Quasi-quantum dot-induced stabilization of alpha-CsPbI3 perovskite for high-efficiency solar cells

Mohammad Khaja Nazeeruddin, Xin Liu, Tom Theodorus Antonius Lummen, Yong Ding, Yuanlong Li, Cheng Liu

All-inorganic cesium lead iodide perovskites (CsPbI3) are promising materials for efficient solar cells. However, they suffer from the formation of an undesired yellow delta -phase under ambient conditions. Herein, we provide a novel strategy to in situ pr ...

Royal Society of Chemistry2020

Lead Sequestration from Perovskite Solar Cells Using a Metal-Organic Framework Polymer Composite

Mohammad Khaja Nazeeruddin, Mounir Driss Mensi, Tom Theodorus Antonius Lummen, Daniel Teav Sun, Wendy Lee Queen, Aron Joel Huckaba, Yi Zhang, Albertus Adrian Sutanto

Perovskite solar cells (PSCs) have increased in power conversion efficiency in the last 10 years, from approximate to 3% to now over 25%. While the best perovskite photovoltaics have remarkable efficiencies, the Pb-based absorber is likely problematic for ...

2020

Optoelectronic and Energy Level Exploration of Bismuth and Antimony-Based Materials for Lead-Free Solar Cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Inés Garcia Benito, Hiroyuki Kanda, Ryosuke Nishikubo

Bismuth- and antimony-based materials, such as A(3)M(2)X(9) and AMSX(2) (A = cation, M = Bi, Sb, S = sulfur, X = halogen), are promising candidates as the counterpart to lead halide perovskite. However, the large number of different compositions and crysta ...

2020

Vertically Aligned 2D/3D Pb-Sn Perovskites with Enhanced Charge Extraction and Suppressed Phase Segregation for Efficient Printable Solar Cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Fei Guo, Xuehui Liu, Chaohui Li, Shi Chen

The concept of mixed 2D/3D heterostructures has emerged as an effective method for improving the stability of lead halide perovskite solar cells, which has been, however, rarely reported in lead-tin (Pb-Sn) mixed perovskite devices. Here, we report a scala ...

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

The Synergism of DMSO and Diethyl Ether for Highly Reproducible and Efficient MA(0.5)FA(0.5)PbI(3)Perovskite Solar Cells

Keith Gregory Brooks, Mohammad Khaja Nazeeruddin, Yonghui Lee, Tom Theodorus Antonius Lummen, Yi Zhang, Hiroyuki Kanda, Ruiyuan Hu, Min Chen

Composition and film quality of perovskite are crucial for the further improvement of perovskite solar cells (PSCs), including efficiency, reproducibility, and stability. Here, it is demonstrated that by simply mixing 50% of formamidinium (FA(+)) into meth ...

2020

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

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

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

Tetrasubstituted Thieno[3,2-b]thiophenes as Hole-Transporting Materials for Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Iwan Zimmermann, Inés Garcia Benito, Javier Urieta Mora

Three hole-transporting materials (HTMs) were prepared following a straightforward synthetic route by cross-linking arylamine-based ligands with a simple thieno[3,2-b]thiophene (TbT) core. The novel HTMs were fully characterized with standard techniques to ...

2020

Molecular materials as interfacial layers and additives in perovskite solar cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen

Solar cells based on organo-metal halide perovskites have gained unprecedented research interest over the last few years due to their low-cost solution processability, high power conversion efficiency, which has recently reached a certified value of 25.2%, ...

Royal Society of Chemistry2020

Hole transporting materials for perovskite solar cells and a simple approach for determining the performance limiting factors

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Iwan Zimmermann

The synthesis and characterization of three novel HTMs with different highest occupied molecular orbital (HOMO) energy levels and their performances in MAPbI(3)-based devices in comparison with Spiro-OMeTAD is reported. Without systematic optimization, the ...

Royal Society of Chemistry2020

Nanoscale Perovskite-Sensitized Solar Cell Revisited: Dye-Cell or Perovskite-Cell?

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, So-Min Yoo

A general and straightforward way of preparing few-nanometer-sized well-separated MAPbI(x)Br(3-x) (MA=methylammonium) perovskite photosensitizers on the surface of an approximately 1 mu m thick mesoporous TiO2 photoanode was suggested through a two-step se ...

2020

Stable and High-Efficiency Methylammonium-Free Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Yi Zhang, Wen Luo, Ruiyuan Hu, Bing Zhang

Organic-inorganic metal halide perovskite solar cells (PSCs) have achieved certified power conversion efficiency (PCE) of 25.2% with complex compositional and bandgap engineering. However, the thermal instability of methylammonium (MA) cation can cause the ...

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

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

Enhanced stability of alpha-phase FAPbI(3) perovskite solar cells by insertion of 2D (PEA)(2)PbI4 nanosheets

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Sanghyun Paek, Yi Zhang, Ruiyuan Hu

Methylammonium (MA) is one of the main obstacles that hold back the commercialization of perovskite solar cells (PSCs). Formamidinium (FA)-based perovskite is a promising photovoltaic material due to its higher thermal stability and smaller bandgap. Howeve ...

Royal Society of Chemistry2020

Molecular engineering of simple carbazole-arylamine hole-transport materials for perovskite solar cells

Mohammad Khaja Nazeeruddin, Tom Theodorus Antonius Lummen, Yong Ding, Xuehui Liu, Cheng Liu

We report synthesis and characterization of novel hole-transport materials (HTMs) with substituents, methylsulfonyl, N,N-dimethylamino or methoxy groups, introduced onto the N of the carbazole unit of carbazole-arylamine and their application in perovskite ...

2020

Perovskite Flash Memory with a Single-Layer Nanofloating Gate

Mohammad Khaja Nazeeruddin, Peng Gao, Tom Theodorus Antonius Lummen, Hobeom Kim

Here we use triple-cation metal-organic halide perovskite single crystals for the transistor channel of a flash memory device. Moreover, we design and demonstrate a 10 nm thick single-layer nanofloating gate. It consists of a ternary blend of two organic s ...

2020

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