Bertille Martinez
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View article: Revealing the Band Structure of FAPI Quantum Dot Film and Its Interfaces with Electron and Hole Transport Layer Using Time Resolved Photoemission
Revealing the Band Structure of FAPI Quantum Dot Film and Its Interfaces with Electron and Hole Transport Layer Using Time Resolved Photoemission Open
International audience
View article: Potential of Colloidal Quantum Dot Based Solar Cells for Near-Infrared Active Detection
Potential of Colloidal Quantum Dot Based Solar Cells for Near-Infrared Active Detection Open
International audience
View article: Azobenzenes as Light-Activable Carrier Density Switches in Nanocrystals
Azobenzenes as Light-Activable Carrier Density Switches in Nanocrystals Open
Control of carrier density in colloidal quantum dots is a major challenge for their integration into optoelectronic devices. Several chemical methods have been proposed to reach this goal including introduction of impurities, nonstoichiome…
View article: Near Unity Absorption in Nanocrystal Based Short Wave Infrared Photodetectors Using Guided Mode Resonators
Near Unity Absorption in Nanocrystal Based Short Wave Infrared Photodetectors Using Guided Mode Resonators Open
International audience
View article: Etude des proprietes optoelectroniques de nanocristaux colloidaux a faible bande interdite : application a la detection infrarouge
Etude des proprietes optoelectroniques de nanocristaux colloidaux a faible bande interdite : application a la detection infrarouge Open
Colloidal semiconductor nanocrystals are nanomaterials synthesized in solution. Below a certain size, these nanocrystals acquire quantum confinement properties: their optoelectronic properties depend on the nanoparticle size. In the visibl…
View article: HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array
HgTe Nanocrystals for SWIR Detection and Their Integration up to the Focal Plane Array Open
Infrared applications remain too often a niche market due to their prohibitive cost. Nanocrystals offer an interesting alternative to reach cost disruption especially in the short-wave infrared (SWIR, λ < 1.7 μm) where material maturity is…
View article: Designing Photovoltaic Devices Using HgTe Nanocrystals for Short and Mid‐Wave Infrared Detection
Designing Photovoltaic Devices Using HgTe Nanocrystals for Short and Mid‐Wave Infrared Detection Open
HgTe nanocrystals offer a unique combination of broadly tunable optical absorption in the infrared from 1 to 100 μm and photoconductive properties. Herein, some of the recent developments related to their integration into photodiodes are d…
View article: Optoelectronic properties of narrow band gap nanocrystals : application to infrared detection
Optoelectronic properties of narrow band gap nanocrystals : application to infrared detection Open
Colloidal semiconductor nanocrystals are nanomaterials synthesized in solution. Below a certain size, these nanocrystals acquire quantum confinement properties: their optoelectronic properties depend on the nanoparticle size. In the visibl…
View article: HgTe Nanocrystal Inks for Extended Short‐Wave Infrared Detection
HgTe Nanocrystal Inks for Extended Short‐Wave Infrared Detection Open
Short‐wave infrared (IR) detection is currently driven by InGaAs technology which has limited the perspective of cost effectiveness and consequently slows the development of IR sensors. Since organic electronics are ineffective in this wav…
View article: Field-Effect Transistor and Photo-Transistor of Narrow-Band-Gap Nanocrystal Arrays Using Ionic Glasses
Field-Effect Transistor and Photo-Transistor of Narrow-Band-Gap Nanocrystal Arrays Using Ionic Glasses Open
The gating of nanocrystal films is currently driven by two approaches: either the use of a dielectric such as SiO2 or the use of electrolyte. SiO2 allows fast bias sweeping over a broad range of temperatures but requires a large operating …
View article: Effect of Pressure on Interband and Intraband Transition of Mercury Chalcogenide Quantum Dots
Effect of Pressure on Interband and Intraband Transition of Mercury Chalcogenide Quantum Dots Open
International audience
View article: Transport in ITO Nanocrystals with Short- to Long-Wave Infrared Absorption for Heavy-Metal-Free Infrared Photodetection
Transport in ITO Nanocrystals with Short- to Long-Wave Infrared Absorption for Heavy-Metal-Free Infrared Photodetection Open
International audience
View article: Doping as a Strategy to Tune Color of 2D Colloidal Nanoplatelets
Doping as a Strategy to Tune Color of 2D Colloidal Nanoplatelets Open
Among colloidal nanocrystals, 2D nanoplatelets (NPLs) made of II-VI compounds appear as a special class of emitters with an especially narrow photoluminescence signal. However, the PL signal in the case of NPLs is only tunable by a discret…
View article: Transport and Phototransport in ITO Nanocrystals with Short to Long-Wave Infrared Absorption
Transport and Phototransport in ITO Nanocrystals with Short to Long-Wave Infrared Absorption Open
Nanocrystals are often described as an interesting strategy for the design of low-cost optoelectronic devices especially in the infrared range. However the driving materials reaching infrared absorption are generally heavy metalcontaining …
View article: Impact of dimensionality and confinement on the electronic properties of mercury chalcogenide nanocrystals
Impact of dimensionality and confinement on the electronic properties of mercury chalcogenide nanocrystals Open
Infrared spectra of CdTe, HgTe and HgTe/CdS nanoplatelets.
View article: Road Map for Nanocrystal Based Infrared Photodetectors
Road Map for Nanocrystal Based Infrared Photodetectors Open
Infrared (IR) sensors based on epitaxially grown semiconductors face two main challenges which are their prohibitive cost and the difficulty to rise the operating temperature. The quest for alternative technologies which will tackle these …
View article: Polyoxometalate as Control Agent for the Doping in HgSe Self-Doped Nanocrystals
Polyoxometalate as Control Agent for the Doping in HgSe Self-Doped Nanocrystals Open
International audience
View article: Design of a Unipolar Barrier for a Nanocrystal-Based Short-Wave Infrared Photodiode
Design of a Unipolar Barrier for a Nanocrystal-Based Short-Wave Infrared Photodiode Open
International audience
View article: Intraband Mid-Infrared Transitions in Ag<sub>2</sub>Se Nanocrystals: Potential and Limitations for Hg-Free Low-Cost Photodetection
Intraband Mid-Infrared Transitions in Ag<sub>2</sub>Se Nanocrystals: Potential and Limitations for Hg-Free Low-Cost Photodetection Open
International audience; Infrared photodetection based on colloidal nanoparticles is a promising path toward low cost devices. However, mid-infrared absorption relies on interband transition in heavy metal based materials, which is a major …
View article: Short Wave Infrared Devices Based on HgTe Nanocrystals with Air Stable Performances
Short Wave Infrared Devices Based on HgTe Nanocrystals with Air Stable Performances Open
International audience; Colloidal quantum dots (CQDs) are candidates of interest for the design of low cost IR detector especially in the short wave infrared (SWIR; 0.8-3 µm), where the vicinity of the visible range makes the high cost of …
View article: Wave-Function Engineering in HgSe/HgTe Colloidal Heterostructures To Enhance Mid-infrared Photoconductive Properties
Wave-Function Engineering in HgSe/HgTe Colloidal Heterostructures To Enhance Mid-infrared Photoconductive Properties Open
The use of intraband transition is an interesting alternative path for the design of optically active complex colloidal materials in the mid-infrared range. However, so far, the performance obtained for photodetection based on intraband tr…
View article: Coupled HgSe Colloidal Quantum Wells through a Tunable Barrier: A Strategy To Uncouple Optical and Transport Band Gap
Coupled HgSe Colloidal Quantum Wells through a Tunable Barrier: A Strategy To Uncouple Optical and Transport Band Gap Open
International audience; Among semiconductor nanocrystals (NCs), 2D nanoplatelets (NPLs) are a special class of nanomaterials with well controlled optical features. So far most of the efforts have been focused on wide band gap materials suc…
View article: Emergence of intraband transitions in colloidal nanocrystals [Invited]
Emergence of intraband transitions in colloidal nanocrystals [Invited] Open
International audience; The chemistry of nanocrystals enables the receipt of semiconductor nanoparticles with tunable optical properties. So far most scientific efforts have been focused on wide band gap materials to achieve a bright lumin…
View article: Terahertz HgTe Nanocrystals: Beyond Confinement
Terahertz HgTe Nanocrystals: Beyond Confinement Open
We report the synthesis of nanocrystals with an optical feature in the THz range. To do so, we develop a new synthetic procedure for the growth of HgTe, HgSe, and HgS nanocrystals, with strong size tunability from 5 to 200 nm. This is used…
View article: Band Edge Dynamics and Multiexciton Generation in Narrow Band Gap HgTe Nanocrystals
Band Edge Dynamics and Multiexciton Generation in Narrow Band Gap HgTe Nanocrystals Open
Mercury chalcogenide nanocrystals and especially HgTe appear as an interesting platform for the design of low cost mid-infrared (mid-IR) detectors. Nevertheless, their electronic structure and transport properties remain poorly understood,…
View article: Strategy to overcome recombination limited photocurrent generation in CsPbX3 nanocrystal arrays
Strategy to overcome recombination limited photocurrent generation in CsPbX3 nanocrystal arrays Open
We discuss the transport properties of CsPbBrxI3−x perovskite nanocrystal arrays as a model ensemble system of caesium lead halide-based perovskite nanocrystal arrays. While this material is very promising for the design of light emitting …
View article: Probing Charge Carrier Dynamics to Unveil the Role of Surface Ligands in HgTe Narrow Band Gap Nanocrystals
Probing Charge Carrier Dynamics to Unveil the Role of Surface Ligands in HgTe Narrow Band Gap Nanocrystals Open
International audience
View article: HgSe Self-Doped Nanocrystals as a Platform to Investigate the Effects of Vanishing Confinement
HgSe Self-Doped Nanocrystals as a Platform to Investigate the Effects of Vanishing Confinement Open
Self-doped colloidal quantum dots (CQDs) attract a strong interest for the design of a new generation of low-cost infrared (IR) optoelectronic devices because of their tunable intraband absorption feature in the mid-IR region. However, ver…