Person
Andrea Cannizzo
This person is no longer with EPFL
Related publications (48)
Tailoring p-Type Behavior in ZnO Quantum Dots through Enhanced Sol–Gel Synthesis: Mechanistic Insights into Zinc Vacancies
Jacques-Edouard Moser, Andrea Cannizzo, Etienne Christophe Socie, Camila Bacellar Cases Da Silveira, Victoria Kabanova
The synthesis and control of properties of p-type ZnO is crucial for a variety of optoelectronic and spintronic applications; however, it remains challenging due to the control of intrinsic midgap (defect) states. In this study, we demonstrate a synthetic ...
2024Ultrafast carrier dynamics and insights in defect mechanism of p-type colloidal ZnO QDs
Jacques-Edouard Moser, Andrea Cannizzo, Etienne Christophe Socie, Camila Bacellar Cases Da Silveira, Victoria Kabanova
In this study, we place a strong emphasis on understanding the ultrafast dynamics of carrier recombination pathways in p-type ZnO, especially in the midgap region. Synthesizing and controlling the properties of p-type ZnO remains a pivotal yet challenging ...
SPIE2024Taking a snapshot of the triplet excited state of an OLED organometallic luminophore using X-rays
Andrea Cannizzo, Giulia Fulvia Mancini, Camila Bacellar Cases Da Silveira, Martin Beck, Victoria Kabanova, Samuel Menzi
OLED technology beyond small or expensive devices requires light-emitters, luminophores, based on earth-abundant elements. Understanding and experimental verification of charge transfer in luminophores are needed for this development. An organometallic mul ...
NATURE PUBLISHING GROUP2020Ultrafast Broadband Fluorescence Up-conversion Study of the Electronic Relaxation of Metalloporphyrins
Majed Chergui, Andrea Cannizzo, Olivier Christian Bräm
We present a systematic study of the ultrafast fluorescence with broadband detection and similar to 110 fs resolution of 5,10,15,20-tetraphenylporphin (TPP) and 2,3,7,8,12,13,17,18-oc-taethylporphin (OEP), with open 3d-shell metals. We also revisit the cas ...
AMER CHEMICAL SOC2019Charge migration and charge transfer in molecular systems
Majed Chergui, Ursula Röthlisberger, Jacques-Edouard Moser, Andrea Cannizzo, Natalie Renuka Banerji, Joël Teuscher, Christopher Alexander Arrell, Pablo Lopez Tarifa, Elisa Liberatore
The transfer of charge at the molecular level plays a fundamental role in many areas of chemistry, physics, biology and materials science. Today, more than 60 years after the seminal work of R. A. Marcus, charge transfer is still a very active field of res ...
2017Dual Luminescence, Interligand Decay, and Nonradiative Electronic Relaxation of Cyclometalated Iridium Complexes in Solution
Majed Chergui, Andrea Cannizzo, Enrico Pomarico, Mahsa Silatani
Femtosecond broadband photoluminescence studies are presented for Ir(ppy)(3) (Ir1), Ir(ppy)(2)(pic) (Ir2), Ir(ppy)(2)(bpy)(PF6) (Ir3), Ir(ppz)(3) (Ir4), and Ir(ppz)(2)dipy (Ir5) (where ppy = 2-phenylpyridine, pic = picolinate, bpy = 2,2'-bipyridine, ppz = ...
American Chemical Society2016Ultrafast electronic and vibrational relaxations in mixed-ligand dithione-dithiolato Ni, Pd, and Pt complexes
Majed Chergui, Frank van Mourik, Andrea Cannizzo, Ahmad Odeh
Ultrafast excited-state dynamics of planar Pt, Pd, and Ni dithione-dithiolato complexes were investigated by transient absorption spectroscopy on the femtosecond-picosecond timescale. All studied complexes show a common photobehaviour, although individual ...
Royal Society of Chemistry2014Real-time observation of the charge transfer to solvent dynamics
Majed Chergui, Andrea Cannizzo
Intermolecular electron-transfer reactions have a crucial role in biology, solution chemistry and electrochemistry. The first step of such reactions is the expulsion of the electron to the solvent, whose mechanism is determined by the structure and dynamic ...
Nature Publishing Group2013Ultrafast Relaxation Dynamics of Osmium-Polypyridine Complexes in Solution
Mohammad Khaja Nazeeruddin, Majed Chergui, Andrea Cannizzo
We present steady-state absorption and emission spectroscopy and femtosecond broadband photoluminescence up-conversion spectroscopy studies of the electronic relaxation of Os(dmbp)(3) (Os1) and Os(bpy)(2)(dpp) (Os2) in ethanol, where dmbp is 4,4'-dimethyl- ...
American Chemical Society2013Ultraviolet transient absorption, transient grating and photon echo studies of aqueous tryptophan
Majed Chergui, Andrea Cannizzo, Cristina Consani
We compare UV transient grating (TG) experiments of aqueous tryptophan with transient absorption (TA) and fluorescence up-conversion measurements. The TG and TA signals show a bi-exponential rise with sub-ps and ps time constants, which are consistent with ...
Elsevier2013