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Armenian science potential in Semiconductor Chemical Sensors and Solar Cells made of Nanostructures and commercialization proposals. Vladimir AROUTIOUNIAN ArmTech 2 Congress October 4, 2008, Panel II Yerevan, Armenia. Yerevan State University DEPARTMENT
ArmTech 2 Congress
October 4, 2008, Panel II Yerevan, Armenia
OF PHYSICS OF SEMICONDUCTORS & MICROELECTRONICS
RESEARCH CENTER OF SEMICONDUCTOR DEVICES AND NANOTECHNOLOGIES
(Faculty of Radiophysics)
40 students per year
2 PhD students per year
Participation in teaching of 12 students per year for SYNOPSYS-ARMENIA
12 Professors, Docents and Ass.-Professors
with compound parabolic -cylindrical concentrator:
1- body of PECell
2 - quartz windows;
3 - semiconductor matrix;
4 – electrolyte;
6-parabolic-cylindrical concentrator.Photoelectrolysis setup (one from 4 versions)Unique in the world
Wavelength, nmPhotoelectrical Conversion of Solar Energy
Multilayer Antireflection Coatings for Silicon Solar Cells
Nano porous silicon, diamond, silicon oxinitride etc. thin films –YSU+ P.Soukiassian (Saclay, France). Covered by 2 French Patents
Reflectance spectrum of DLC/PS (solid line) and SiO2/TiO2 double layer ARCs (dash-dotted line)
•THERMO PHOTOVOLTAIC CELLS (YSU) made of InP-InAs System. Graded-bandgap photodiodes and position-sensitive detectors made of 3-5 semiconductors grown in YSU by liquid and electroliquid epitaxy[V. Aroutiounian, K. Gambaryan, V. Gevorgyan (now in Russ-Slavonic Univ. Yerevan)].•
•Quantum dot nanocrystalline solar cells [ Aroutiounian, A. Khachatryan, S. Petrosyan (now in Russ-Slavonic Univ. Yerevan), and K. Touryan (USA); A. Kechiyants (Inst. For Radio Phys. & Electronics, NAN, Ashtarak)] and other nanoscale photodevices
QD cells proposed in YSU in 2000 and realized in Japan in 2003.
• Now we have first experimental samples with QDs grown un YSU (K. Gambaryan). We realized SELF–ASSEMBLED InAsSbP - BASED STRAIN INDUCED ISLANDS ON InAs SUBSTRATES AND SAW THEIR EVOLUTION FROM PYRAMIDS TO QUANTUM DOTS
•“SOLAREN” (V. Afiyan) and “TRANSISTOR” (A. Vardanyan) produced in small scale solar panels using silicon solar cells made out of Armenia. STUA are working on covering of Si solar cells with diamond like carbon ARC (J. Panosyan)
•Besides residential applications, gas and fire detectors are used under operating conditions at fossil as well as nuclear power plants, in fuel cells in order to prevent different type incidents. It is necessary to have аn information about the concentration of hydrogen, methane, carbon monoxideand dioxide as well as other gases and humidity in order to prevent false alarm.
•Research and development of world class semiconductor metal-oxide adsorptive sensing elements (with micro-and nano size of sensitivegrains) for different gases made of different metaloxide semiconductors as well as integral components of new type sensors and detectors or non-expensive Hybrid Multisensor Security Systemfor the market are carrying out in YSU
Another type hydrogen gas sensor working without pre-heating of work-body is proposed in collaboration with Prof. P. Soukiassian and shown in Figure. Pt catalytic layer and Au electrical contacts were deposited by ion-beam sputtering on metal oxide thin film which prevent porous silicon sensitive layer from oxidation. All types of sensors are covered by patents.
Fire detection and registration at the early stages has always been an extremely important problem. It is concerned with, primarily, guarantees of safety of human life and health, pre-serving buildings and constructions as well as environment ecology.
New, absorption type smoke detectors with cheap semiconductor sensitive chip are developed by us. Detectors are covered by several patents including the US one.
Recently we successfully partly tested our detectorsin Southwest Research Institute (San Antonio, USA).
Regretfully, we had not the amount for full testing.
Our detectors’ cost and sizeare much lower than they for photoelectrical and radioactive ionization detectors, which are today in the market.
Bi2O3 adsorptive type smoke and NOx sensors
(Patented in Armenia, the first modification was Patented in US)The Product is most effective at fire detection in early stages of smoldering and can be extremely useful in multi-sensor solutions in Home security systems and e - noses
Dwelling houses and apartments, hotels, hospitals.
a. Military and civil warehouses, depot, aircrafts hangars, plant facilities.
b. Elevator (wells) and communication lines shafts of high-rise buildings, underground communication lines, subway systems.
Aircrafts and ships
Ecologic monitoring of environment *)
*) The product is applicable for environmental monitoring in large cities, where the motor transport concentration is high, and in industrial cities for air monitoring with the object to monitor the norm excess content of SOx and NOx gases.
It can provide ecological monitoring of environment in system of “electron nose” on high altitudes in mountainous regions and in intensive areas of pass of Wind Rose.
It can also work without fail at autonomously energy supply to function in sensor net system for early fire warning in large forest tracts.
Such companies as Invensys Sensor Systemsand NOTIFIER - Fire Alarm Systems and Technology were considered by IC2 Institute technology assessing teams as potential partners for future commercialization of the product.
Nanocrystalline SnO2 thin-films based sensors for Hydrogen and CO detection(Patented in Armenia); the product is developed under DOE funding.
Porous silicon – metal oxide tandem nanostructures for Hydrogen and other hazardous gases sensing including CO (Patented in Armenia)
Hydrocarbon Gas and Methane Nanosensors made of ZnO and other metal oxides (Know - how)
The key advantage of such low cost nanosensors are high sensitivity and workability of the sensing element nearby room temperatures, possibilities to realize multi-sensor solutionmade on single crystal chipset platform.
Hydrogen propelled/integrated critical infrastructure and autonomous systems monitoring
Thekey advantage of the Product is able to detect Hydrogen and various Hazardous gases with controlled sensitivity
In our opinion Honeywell International Inc.can foster patentable potential in this product upgrade.
Local market is considered as the most effective investment zone for large-scale production of such nanosensors.
Sensor types with the highest demand volumes worldwide are temperature sensors, pressure sensors, flow sensors, binary position sensors (proximity switches, light barriers, reflectortype photosensors), position sensors, chemical sensors for measurement in liquids and gases, filling sensors, speed and rpm-sensors, flue gas sensors and fire detectors.
The fastest growing types of sensors include rain sensors, thickness sensors, sensors that measure the quality of liquids, navigation sensors, tilt sensors, photodetectors, glass breakage sensors, biosensors, magnetic field sensors, and motion detectors.
Yerevan State University
40 students are graduated annually in the fields of Radio physics, Microelectronics and Semiconductor Physics. Research Center of Semiconductor Devices and Nanotechnologies is working now.
State Engineering University of Armenia
40 students are graduated annually in the fields of Radio electronics and Circuitry Russian-Slavonic University
20 students are graduated annually in the field of
(preferable in Armenia) of proposed and realized by us samples of new type smoke and gas detectors, photoelectrolysis cells and thermo photovoltaic devices as well as antireflection coatings for silicon solar cells and to help us in the realization of our promising nanoscale devices!!!