Balthazar Lechêne

ORCID: 0000-0003-3733-9641
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About
Contact & Profiles
Research Areas
  • Organic Electronics and Photovoltaics
  • Conducting polymers and applications
  • Supercapacitor Materials and Fabrication
  • Advanced MRI Techniques and Applications
  • Advanced Sensor and Energy Harvesting Materials
  • Thin-Film Transistor Technologies
  • Perovskite Materials and Applications
  • Silicon and Solar Cell Technologies
  • Nanowire Synthesis and Applications
  • Innovative Energy Harvesting Technologies
  • Energy Harvesting in Wireless Networks
  • Neonatal and fetal brain pathology
  • Semiconductor materials and interfaces
  • Advanced Battery Technologies Research
  • Congenital Heart Disease Studies
  • Advanced battery technologies research
  • Fetal and Pediatric Neurological Disorders
  • Atomic and Subatomic Physics Research

Lucile Packard Children's Hospital
2019

Stanford University
2019

University of California, Berkeley
2016-2017

Laboratoire Optimisation de la Conception et Ingénierie de l'Environnement
2013-2014

Centre National de la Recherche Scientifique
2013

Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2012-2013

CEA LITEN
2012-2013

European Automobile Manufacturers Association
2013

National Institute of Solar Energy
2013

Institut National de l'Énergie Solaire
2012

Compliant battery design strategy for wearable power sources with high degree of flexibility and stretchability.

10.1126/sciadv.1602051 article EN cc-by-nc Science Advances 2017-06-02

Abstract Magnetic resonance imaging is an inherently signal-to-noise-starved technique that limits the spatial resolution, diagnostic image quality and results in typically long acquisition times are prone to motion artefacts. This limitation exacerbated when receive coils have poor fit due lack of flexibility or need for padding patient comfort. Here, we report a new approach uses printing fabricating coils. Our enables highly flexible, extremely lightweight conforming devices. We show...

10.1038/ncomms10839 article EN cc-by Nature Communications 2016-03-10

Background Screen-printed MRI coil technology may reduce the need for bulky and heavy housing of electronics provide a better fit to patient anatomy improve performance. Purpose To assess performance caregiver clinician acceptance pediatric-sized screen-printed flexible array as compared with conventional technology. Materials Methods A 12-channel was designed by using screen-printing process. Element coupling phantom signal-to-noise ratio (SNR) were assessed. Subjects scanned pediatric...

10.1148/radiol.2019181883 article EN Radiology 2019-02-26

A round robin, where several laboratories study the same solar cells in a sequential manner, is fast and powerful method that enables validation of performance parameters establishment their spread. Flexible ITO-free polymer characterized this manner present spread recorded with standard error 5–25% degradation eliminated. This underlines need for general use such techniques.

10.1002/aenm.201200079 article EN Advanced Energy Materials 2012-05-18

In standard organic solar cells, an electron transporting layer (ETL) is often inserted between the active and cathode in order to achieve good performances. this work, a zinc oxide (ZnO) ETL used with aluminum cathode, yielding functional fresh cells. However, upon storage dark inert atmosphere, S-shape quickly appears J–V curves, leading sharp decline of conversion efficiency. By building cells various sequences, we show that stems from modification ZnO/Al interface. Further experiments...

10.1021/jp5051518 article EN The Journal of Physical Chemistry C 2014-07-25

The polymer solar cells (PSCs) have been developed as a promising low-cost renewable energy. best PSC is composed of donor layer and fullerene acceptor bulk-heterojunction (BHJ) composite sandwiched between transparent conductive oxide, metal electrode. In this manuscript we report on the integration electrodeposited ZnO CuSCN in PSCs electron (ETL) hole (HTL) transporting layers. We inverted polymeric photovoltaic devices based ETL with power conversion efficiency (PCE) 3.3% glass...

10.1149/05302.0107ecst article EN ECS Transactions 2013-05-02

We demonstrate a wireless sensor node (WSN) that operates purely on harvested ambient indoor light energy and regulates its duty cycle via voltage-triggered sensing transmission. The extremely low-power found in environments can be considered at first sight as unsuitable for high-power load demands characteristic of radios [1], but by leveraging spectrum-tailored solar cells, trickle charging reservoir, implementing triggered cycling, we show these power consistently met. All harvesting...

10.1088/1742-6596/773/1/012033 article EN Journal of Physics Conference Series 2016-11-01
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