Detecting the ultra-violet (UV) radiation is of primary importance for a wide variety of applications, including flame detection (i.e., fire alarms, combustion monitoring, missile warning, …), biological and chemical analysis (i.e., ozone, organic compounds, …), and optical communications (i.e., inter-satellite communications). Most of the UV photodetectors (PDs) are based on silicon and wide band gap (WBG) semiconductor devices in the form of two-dimensional films. However, their cost, energy consumption, operating bias voltage, and response times, are incompatible with their use in connected multifunctional nanoscale devices, which are more and more developed.
In order to address all these challenges, the project JCJC DOSETTE proposes original and innovative solutions to develop a new class of self-powered UV PDs that are based on WBG semiconducting p-n heterojunctions consisting of ordered ZnO nanowire (NW) core shell heterostructures, with the additional requirements of using low-cost and at least semi-abundant materials deposited by low-cost and surface scalable chemical deposition techniques working at relatively low-temperature. These self-powered UV PDs are expected to benefit from a low-cost, a large active surface area, a high sensitivity through efficient light trapping and charge carrier management, a high spectral selectivity through light trapping management, and fast response (i.e., rise and decay) times.
The objectives involve the design of these ordered ZnO NW core shell heterostructures from optoelectronic simulations, their fabrication by low-cost and surface scalable innovative chemical deposition techniques (dip coating, CBD, SILAR, SALD, CVD, chemical spray) combined with technological process in a cleanroom environment (advanced lithography and etching), their advanced characterization by a large number of techniques (FEG-SEM, TEM, STEM, XRD, optical spectroscopy, absorption and electrical transport measurements, responsivity, response times…), and their integration into self-powered UV PDs. The photovoltaic behavior will also be determined to assess their potential to power the complete devices. A special emphasis will also be made on the investigation of the piezophototronics effects in these devices.
The project JCJC DOSETTE will benefit from the unique skills of the coordinator and his project team in LMGP on the development of WBG NW heterostructures, together with close collaborations with IMEP-LAHC and Institut Néel and strong supports of technological and advanced characterization platforms, to form a multidisciplinary consortium, being able to tackle all the tasks with complementary approaches dealing with the design, deposition, advanced characterization, and fabrication of self-powered UV PDs. It will gather, in a new, standalone research axis at LMGP, multi-disciplinary skills in materials science, chemistry, engineering, and semiconductor and device physics.
The project JCJC DOSETTE will result in important scientific, technical, and economic beneficial effects. The connected multifunctional nanoscale devices are strongly developed to improve the living and development conditions of human being as well as companies and cities while decreasing the global energy demand. The self-powered connected multifunctional nanoscale devices should thus represent in the medium term a huge market with a significant economic potential.
The dissemination of the scientific results will further be carried out both at the research, industrial and teaching levels, via the publications and communications in high quality international journals and conferences as well as via Master courses in Phelma and in several European Master Program and Summer School.
The project JCJC DOSETTE offers a unique opportunity to address all these topics by providing new disruptive solutions with a high added value and to acquire a leadership at the international level in the development of ZnO NW-based optoelectronic devices.
Monsieur Vincent CONSONNI (Laboratoire des Matériaux et du Génie Physique)
The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.
LMGP - CNRS Alpes Laboratoire des Matériaux et du Génie Physique
Help of the ANR 225,005 euros
Beginning and duration of the scientific project: January 2018 - 36 Months