Publications de Guixiang Li | EPFL Graph Search

Buried Hole-selective Interface Engineering for High-efficiency Tin-lead Perovskite Solar Cells with Enhanced Interfacial Chemical Stability

Mixed Sn-Pb perovskites are attracting significant attention due to their narrow bandgap and consequent potential for all-perovskite tandem solar cells. However, the conventional hole transport materials can lead to band misalignment or induce degradation ...

ELSEVIER2025

Fluorene-Terminated π-Conjugated Spiro-Type Hole Transport Materials for Perovskite Solar Cells

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Guixiang Li

Spiro-OMeTAD is a widely used hole transport material (HTM) in perovskite solar cells (PSCs), but its inherent low hole mobility and poor thermal stability affect the overall performance of PSCs. To overcome these limitations, we develop a series of fluore ...

AMER CHEMICAL SOC2025

Resilience pathways for halide perovskite photovoltaics under temperature cycling

Mohammad Khaja Nazeeruddin, Guixiang Li

Metal-halide perovskite solar cells have achieved power conversion efficiencies comparable to those of silicon photovoltaic (PV) devices, approaching 27% for single-junction devices. The durability of the devices, however, lags far behind their performance ...

NATURE PORTFOLIO2025

Tailored Lattice-Matched Carbazole Self-Assembled Molecule for Efficient and Stable Perovskite Solar Cells

Guixiang Li

Self-assembled monolayer molecules have been widely employed as interfacial transport materials in inverted perovskite solar cells (PSCs), demonstrating high efficiency and improved device stability. However, self-assembling monolayer (SAM) molecules often ...

2025

Orientation controlled photogenerated carriers on self-supporting CdS/Ni3S2 paper toward photocatalytic hydrogen evolution and biomass upgrading

Guixiang Li

The appropriate regulation of band structure is an effective strategy in constructing efficient photocatalytic systems. Present photocatalytic system mainly employs powder photocatalysts, which makes their recovery reliant on expensive separation processes ...

2024

Controlling Tin Halide Perovskite Oxidation Dynamics in Solution for Perovskite Optoelectronic Devices

Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Zhaofu Fei, Aurélien Bornet, Roland Christopher Turnell-Ritson, Guixiang Li

As a leading contender to replace lead halide perovskites, tin-based perovskites have demonstrated ever increasing performance in solar cells and light-emitting diodes (LEDs). They tend to be processed with dimethyl sulfoxide (DMSO) solvent, which has been ...

Wiley-VCH Verlag GmbH2024

Anchoring Charge Selective Self-Assembled Monolayers for Tin-Lead Perovskite Solar Cells

Guixiang Li

Self-assembled monolayers (SAMs) have displayed great potential for improving efficiency and stability in p-i-n perovskite solar cells (PSCs). The anchoring of SAMs at the conductiv metal oxide substrates and their interaction with perovskite materials mus ...

Wiley-V C H Verlag Gmbh2024

High-Stable Lead-Free Solar Cells Achieved by Surface Reconstruction of Quasi-2D Tin-Based Perovskites

Feng Yang, Antonio Abate, Michael Saliba, Meng Li, Zhe Li, Xingyu Gao, Rui Zhu, Guixiang Li

Tin halide perovskites are an appealing alternative to lead perovskites. However, owing to the lower redox potential of Sn(II)/Sn(IV), particularly under the presence of oxygen and water, the accumulation of Sn(IV) at the surface layer will negatively impa ...

Wiley-V C H Verlag Gmbh2023

Managing Excess Lead Iodide with Functionalized Oxo-Graphene Nanosheets for Stable Perovskite Solar Cells

Guixiang Li

Stability issues could prevent lead halide perovskite solar cells (PSCs) from commercialization despite it having a comparable power conversion efficiency (PCE) to silicon solar cells. Overcoming drawbacks affecting their long-term stability is gaining inc ...

Wiley-VCH Verlag GmbH2023

Stabilization of Inorganic Perovskite Solar Cells with a 2D Dion-Jacobson Passivating Layer

Guixiang Li

Inorganic metal halide perovskites such as CsPbI3 are promising for high-performance, reproducible, and robust solar cells. However, inorganic perovskites are sensitive to humidity, which causes the transformation from the black phase to the yellow & delta ...

Wiley2023