Publications de Qiang Xu | EPFL Graph Search

Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites

Michael Graetzel, Nripan Mathews, Qiang Xu, Bing Wu

Halide perovskites possess enormous potential for various optoelectronic applications. Presently, a clear understanding of the interplay between the lattice and electronic effects is still elusive. Specifically, the weakly absorbing tail states and dual em ...

Springer2019

Indirect tail states formation by thermal-induced polar fluctuations in halide perovskites (vol 10, 484, 2019)

Michael Graetzel, Nripan Mathews, Qiang Xu, Bing Wu

Springer2019

Low threshold and efficient multiple exciton generation in halide perovskite nanocrystals

Michael Graetzel, Nripan Mathews, Qiang Xu, Mingjie Li

Multiple exciton generation (MEG) or carrier multiplication, a process that spawns two or more electron-hole pairs from an absorbed high-energy photon (larger than two times bandgap energy E-g, is a promising way to augment the photocurrent and overcome th ...

Nature Publishing Group2018

Giant five-photon absorption from multidimensional core-shell halide perovskite colloidal nanocrystals

Michael Graetzel, Nripan Mathews, Qiang Xu

Multiphoton absorption processes enable many technologically important applications, such as in vivo imaging, photodynamic therapy and optical limiting, and so on. Specifically, higher-order nonlinear absorption such as five-photon absorption offers signif ...

Nature Publishing Group2017

Water Saving and Energy Reduction through Pressure Management in Urban Water Distribution Networks

Koen Blanckaert, Qiang Xu

Water shortages and climate change are worldwide issues. Reduction in water leakage in distribution networks as well as the associated energy saving and environmental impacts have recently received increased attention by scientists and water industries. Pr ...

Springer2014