Publications de Cheng Liu | EPFL Graph Search

A thermotropic liquid crystal enables efficient and stable perovskite solar modules

Mohammad Khaja Nazeeruddin, Yong Ding, Bin Ding, Cheng Liu, Jian Xu

Perovskite solar cells have seen impressive progress in performance and stability, yet maintaining efficiency while scaling area remains a challenge. Here we find that additives commonly used to passivate large-area perovskite films often co-precipitate du ...

Nature Portfolio2024

Engineering ligand reactivity enables high-temperature operation of stable perovskite solar cells

Michael Graetzel, Shaik Mohammed Zakeeruddin, Zaiwei Wang, Felix Thomas Eickemeyer, Mingyang Wei, Thi Thu Trang Pham, Cheng Liu, Jian Xu

Perovskite solar cells (PSCs) consisting of interfacial two- and three-dimensional heterostructures that incorporate ammonium ligand intercalation have enabled rapid progress toward the goal of uniting performance with stability. However, as the field cont ...

American Association for the Advancement of Science2023

Retarding solid-state reactions enable efficient and stable all-inorganic perovskite solar cells and modules

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Rosario Scopelliti, Zhaofu Fei, Farzaneh Fadaei Tirani, Yong Ding, Bin Ding, Yen-Cheng Liu, Hiroyuki Kanda, Olga Syzgantseva

All-inorganic CsPbI3 perovskite solar cells (PSCs) with efficiencies exceeding 20% are ideal candidates for appli-cation in large-scale tandem solar cells. However, there are still two major obstacles hindering their scale-up: (i) the inhomogeneous solid-s ...

AMER ASSOC ADVANCEMENT SCIENCE2023

Expanded Phase Distribution in Low Average Layer-Number 2D Perovskite Films: Toward Efficient Semitransparent Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Bin Ding, Yong Ding, Yen-Cheng Liu, Hiroyuki Kanda, Xuehui Liu, Cheng Liu, Hao Huang

The application of low average layer-number (< n & rang;

2021

Defect Suppression in Oriented 2D Perovskite Solar Cells with Efficiency over 18% via Rerouting Crystallization Pathway

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

Vertically oriented 2D perovskites exhibit promising optoelectronic properties and intrinsic stability, but their photovoltaic application is still limited by the low power conversion efficiency (PCE) compared to 3D analogs. Here, a new crystallization pat ...

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

Dopant‐Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Bin Ding, Yong Ding, Kasparas Rakstys, Hiroyuki Kanda, Olga Syzgantseva, Cansu Igci, Xianfu Zhang, Cheng Liu

The emerging CsPbI3 perovskites are highly efficient and thermally stable materials for wide-band gap perovskite solar cells (PSCs), but the doped hole transport materials (HTMs) accelerate the undesirable phase transition of CsPbI3 in ambient. Herein, a d ...

Wiley-VCH Verlag GmbH2021

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

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

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

Dimension-Controlled Growth of Antimony-Based Perovskite-like Halides for Lead-Free and Semitransparent Photovoltaics

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

Antimony (Sb) has been identified as a promising candidate for replacing toxic lead (Pb) in perovskite materials because Sb-based perovskite-like halides exhibit not only intrinsic thermodynamic stability but also a unique set of intriguing optoelectronic ...

2020

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

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