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Profile: Dr. P. Thiyagarajan
Name Panchatcharam Thiyagarajan
Designation Assistant Professor
Department/Centre Crystal Growth Centre
Institution/University Anna University, Chennai
Phone +91 44 2235 8326
Email [email protected]
Education
Ph.D (Physics), 2007, Indian Institute of Technology Madras (IITM), Chennai
M.Tech (Process Metallurgy), 2001, Karnataka Regional Engg. College (KREC)
M.Sc (Materials Science), 1999, Anna University Chennai
B.Sc (Physics), 1996, University of Madras Chennai
Career
1. Assistant Professor, Since Jan 2010
2. Post Doc, Aug 2009 - Jan 2010, Advanced NanoProducts Co Ltd, South Korea
3. Project Officer, Nov 2008 – Aug 2009, IIT M, Chennai
4. Post Doc, Oct 2007 – Oct 2008, Pohang University of Science and Technology
(POSTECH), South Korea
5. Application Engineer, HEF India PVT Ltd, MM Nagar, Kanchipuram Dt.
Theory Courses handling Degree/Branch
1. Engineering Physics B.Tech (PRPC/Leather)*
2. Physics of Materials B.Tech (IBT/Pharma)#
3. Materials Science B.E (IE)
4. Physics of Electrical and Electronics Materials B.E (EEE)
5. Electronics and Instrumentation M.Sc (Mat. Sci)
6. Fiber Optic Sensors M.Tech (Laser)
7. Characterization of Semiconductor crystals Ph.D (Crystal Science)
Laboratory Course: Physics (*,#)
2
Doctorial programme guidance (Ph.D)
S.No. Name Title of Research Ongoing Completed
1 R.Sivakami Synthesis and characterization of
Phosphors for SSL
Yes
2 Janani Preparation and characterization of
Upconversion phosphors for IR
signal detectors
Yes
3 Angairkani Development of PEMFC for fuel
cell fabrication
Yes
Masters Programme guidance (M. Tech)
S.No. Name Title of Project Work Ongoing Completed
1 Divya Synthesis and characterization of
Phosphors SrS:Ce,Li/ SrS:Eu
phosphor blends for SSL
- June 2014
2 Ramesh Preparation and characterization of
ZnO:SiO2 nanocomposites with
varying Urea fuel content
- June 2014
3 Uma Synthesis and characterization of
long after glow SrAl2O4: Eu
phosphors
- June 2014
Area of Research
Optoelectronics: Inorganic Luminescent Materials (Phosphors), Nanostructured bulk and
Thin films of II –VI Semiconducting Oxides, Cu(InGa)Se2 Solar Cells
Title of Thesis : Synthesis and luminescence studies of sulfide and
oxide based phosphors for colour and white light emission” (summary of work is enclosed).
Thesis Advisor : Prof. M. S. Ramachandra Rao
Materials Science Research Centre and
Department of Physics Indian Institute of Technology (IIT) Madras
Chennai 600 036, India. ([email protected])
3
Presented Invited Talk in National/International Conferences and Workshops
1 Synthesis and characterization of Crystalline - Sulfides, Silicates and Nano-
Composite based phosphors for device applications, Recent Trends on Materials
and their applications (RTMA-2013), Jan 2014, Sree Sastha Institute of
Engineering and Technology, Chembarampakkam, Chennai – 600 123.
2 Bulk, Nano and thin film (nano) materials for optoelectronic and Solar Energy
Devices, Recent Trends on Nanostructures and their Applications (RTNA- 2013),
Sep 2013, Sree Sastha Institute of Engineering and Technology,
Chembarampakkam, Chennai – 600 123.
3 A study of Optoelectronic properties on rare earth (RE) and transition metal (TM)
doped alkali earth metal chalcogenides and silicates in various dimensions
(NSCG 2012) 20 -22 Dec 2012, Crystal Growth Centre, Anna University,
Chennai – 600 025.
4 Nanocomposites and Nanophosphors for white light emission, Advanced
Nanomaterials (ANM 2012), 17-19 October 19, 2012, Department of Physics,
Materials Science Research Centre, and Department of Metallurgy and Materials
Engineering, Indian Institute of Technology Madras, Chennai - 36
5 Synthesis and characterization of ZnO based phosphors and related phosphor
composites in Bulk, Thin film and Nano form, IITM – Japan Symposium on
ZnO Nanocrystals and Allied Materials, 9 – 10, January 2012, Department of
Physics, Materials Science Research Centre, Indian Institute of Technology
Madras, Chennai - 36
6 Luminescent property studies on II – VI compounds of metal oxides and
chalcogenides in Bulk, Thin film and Nano form, Asia- Pacific Workshop on
4
Materials Characterization, 22 – 24, September 2011, Crystal Growth Centre,
Anna University, Chennai – 600 025.
7 Bulk, Thin film and nano form of optoelectronic materials for device applications,
Krystal 2011, 16th September 2011, organized by SMSE & MMS, at Department
of Mechanical Engineering, Anna University, Chennai – 600 025.
8 Synthesis and Characterization of Thin Films and Nanostructured Semiconducting
Materials for Optoelectronic Applications, Indo – Italian Advanced Level
Workshop On Semiconductor Nanostructures, Ultra Thin Films and
Applications, October 8-10, 2010, Anna University, Chennai- 600 025.
9 A systematic study of colour and white light emitting phosphors for energy
efficient solid state lighting and displays, International Conference on
Emerging Technologies in Renewable Energies (ICETRE), 18-21 August,
2010, Anna University, Chennai – 600025.
10 Synthesis and characterization of sulfide and oxide based phosphors for colour
and white light emission, UGC Sponsored Workshop on Recent Trends in
Crystal Growth, 30th
March 2010, Anna University, Chennai – 600025
Achievements & Awards:
1. Highlights of our research work in Nature India: Our article entitled “White light
emitting diode synthesis using near ultraviolet light excitation on Zinc oxide–Silicon
dioxide nanocomposite P. Thiyagarajan, M. Kottaisamy and M.S. Ramachandra Rao,
published in Scripta Mater., 59, (7), 2008, 722-725 has been highlighted in “Nature
India” due to its novelty.
http://www.nature.com/nindia/2008/081023/full/nindia.2008.309.html#B1
2. MHRD SRF (Senior Research Fellowship) Award for execute research.
5
3. International Journal reviewer: Acting as a reviewer in 7 international journals
- J. Physics D : Applied Physics - Nanotechnology
- Semiconductor Science and Technology - Physica B: Condensed Matter
- J. Electrochemical Society - Materials Science and Engg. – B - Current Applied Physics
4. Editorial Board member in Asian Journal of Applied Science and Technology
(Global journal)
6. Recent Publication in International Journals
1. P.Thiyagarajan, R.Sivakami and M.S.Ramachandra Rao, White luminescence of
amorphous SiO2 matrix capped and uncapped
Zn1-m-nS: Ce0.0005, Li0.0005, Mnn (1<n<0.01) mol% phosphors for solid state lighting, ECS-
J.Solid State Sci. & Tech, 3(7) (2014) R115 – R120.
2. P.Thiyagarajan, M. Kottaisamy and M.S.Ramachandra Rao, Synthesis and
characterization of ZnO based phosphors and related phosphor composites in Bulk, Thin
film and Nano form, Book Chapter - Springer Series in Materials Science 180 (2014) 247-
268
3. Jung Min, P. Thiyagarajan S. W. Rhee, and “Deposition of Al-doped ZnO films on
polyethylene naphthalate substrate with radio frequency magnetron sputtering”, Thin
Solid films, 518 (2010) 5860–5865. Impact factor: 2.014 (2013)
4. Panchatcharam Thiyagarajan and M. S. Ramachandra Rao, “Cool white light
emission on Ca3-(l+n)MgSi2O8:Cel3+
, Eun2+
phosphors and analysis of energy transfer
mechanism” Appl. Phys A – Materials Science and Processing”, 99 (4) (2010) 947–953.
Impact factor: 1.63(2013)
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5. Panchatcharam Thiyagarajan, M. Kottaisamy, K. Sethupathi, and
M. S. Ramachandra Rao, “A new red colour emitting phosphor - ZnS: Mn co-doped with
Ba for electroluminescent (EL) displays”,Displays, 30, (2009) 202-204. Impact factor:
1.390(2013)
6. P. Thiyagarajan, M. Kottaisamy, N. Rama and M. S. Ramachandra Rao, “Study of
pulsed laser deposited ZnGa2O4:Mn phosphor thin films in an oxygen controlled
environment” J.Phys D: Appl Phys., 42, (2009), 155301. Impact factor: 2.44 (2011)
7. P. Thiyagarajan, M. Kottaisamy, and M. S. Ramachandra Rao, “SrS:Ce/ZnS:Mn
– A diband phosphor for near-UV and blue- LED converted white light emitting diodes”
J. Lumin., 129, (2009), 991 – 995(Impact factor: 1.963 (2013).
8. P. Thiyagarajan, Brijesh Tiwari, M. Kottaisamy, N. Rama and
M. S. Ramachandra Rao, “Near UV excitable Y2-x-yGdySiO5:Cex phosphors for white
light emitting”, Appl. Phys. A, 94, (2009), 607 – 612(Impact factor: 1.63 (2013).
9. P. Thiyagarajan, M. Kottaisamy N. Rama, and M. S. Ramachandra Rao, “White
light emitting diode synthesis using near ultraviolet light excitation on Zinc oxide-Silicon
dioxide nanocomposites” Scripta Mater., 59, (2008), (7), 722-725 (Impact factor: 2.699
(2013).
10. M. Kottaisamy, P. Thiyagarajan, J. Mishra, and M. S. Ramachandra Rao “Color
tuning properties of Y3Al5O12:Ce phosphor and their blends for white LEDs“ Mater. Res.
Bull., 43 (7), (2007), 1657 -1663(Impact factor: 2.015 (2013).
11. Shubra Singh, P. Thiyagarajan, K. Mohankant, M. K. Samy, Tirupathiah, B.
Tiwari and M. S. Ramachandra Rao, “Topical review: Structure, microstructure and
physical properties of ZnO based materials in various forms: Bulk, thin film and nano”, J.
Phys. D:Appl. Phys. 40, (2007), 6312 -6327. (2nd position of 30 best downloaded articles
in J. Phys. D:Appl. Phys. in 2007) (Impact factor: 2.44 (2011).
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12. P. Thiyagarajan, M.Kottaisamy and M.S. Ramachandra Rao, “Structural and
luminescence properties of pulsed laser deposited green emitting Zn2SiO4:Mn phosphor
thin films”, Scripta Mater., 57(5), (2007), 433-436(Impact factor: 2.699 (2013).
13. P. Thiyagarajan, M.Kottaisamy and M.S.Ramachandra Rao, “Pulsed laser
deposited oxide green emitting thin film phosphors: Optimization of growth conditions”,
Mater. Res. Soc. Symp. Proc., 988, (2007), QQ06 – 12 (Impact factor: 1.167 (2011).
14. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, “Improved
luminescent properties of Zn2SiO4:Mn green phosphor prepared from a gel combustion
synthesized ZnO:Mn-SiO2”, J. Electrochem. Soc., 154 (4), (2007), H297-H303 (Impact
factor: 2.590 (2013).
15. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, “Luminescent
properties of near UV excitable Ba2ZnS3:Mn red emitting phosphor blend for white LED
and display applications” J Phys. D: Applied Phys., 39, (2006), 2701-2706(Impact
factor: 2.44 (2011).
16. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, “Influence of
sulfur and charge compensator on the luminescent properties of SrS:Ce prepared from
SrSO4:Ce(SO4)2”, Mater. Res. Bull., 42(4), (2006), 753-761(Impact factor: 2.015
(2013).
17. P. Thiyagarajan, M. Kottaisamy, K. Sethupathi and M. S. Ramachandra Rao,
“Preparation and luminescent properties of SrS:Ce by addition of sulphur as a co-
activator in SrSO4:Ce(SO4)2.7H2O by carbothermal reduction“, Mater. Res. Soc. Symp.
Proc., 829, (2005), B2.33(Impact factor: 1.167 (2011).
Conferences/ Symposium/Workshops: 1. P.Thiyagarajan and R.Sivakami, “White light emission from ZnS:Ce3+,Mn2+
nanophosphors under UV source excitation : Synthesis and Characterization, 2014
MRS Spring Meeting, April 21-25 2014, San Francisco, California, USA.
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2 R. Sivagami and P. Thiyagarajan , Synthesis and Characterization of
Sr3MgSi2O8 : Ce3+
, Eu2+
Mn2+
Phosphors for UV excitable White Light Emitting
Diodes, National Seminar on Crystal Growth – (NSCG), 20 -22 Dec 2012,
Crystal Growth Centre, Anna University, Chennai - 25
3. R. Sivagami and P. Thiyagarajan, Sol-Gel Synthesis and Characterization of
Sr3-x-yMgSi2O8: (Ce3+
Li+)0.01, Eu
2+(0.005<y<0.02) Phosphors for UV excitable white
light emitting diodes, International Conference on Advanced Nanomaterials
(ANM 2012), 17-19 October 19, 2012, Department of Physics, Materials Science
Research Centre, and Department of Metallurgy and Materials Engineering,
Indian Institute of Technology Madras, Chennai - 36
4. P.Thiyagarajan and M.S.Ramachandra Rao, Synthesis and luminescence
of uncapped and capped amorphous SiO2 matrix on Zn1-m-nS: (Ce,
Li)(m=0.0005), Mnm(1<m<0.01) mol% phosphors, International conference on
luminescence and its applications (ICLA-2012)
February 7-10, 2012, Hyderabad, India.
5. P. Thiyagarajan, M. Kottaisamy, K. Sethupathi, M. S. Ramachandra Rao,
Preparation and luminescent properties of SrS:Ce by addition of sulphur
as a co-activator in SrSO4:Ce(SO4)2.4H2O by carbothermal reduction, MRS
Fall Meeting, Nov 29-Dec 04, 2004, Bosten, USA.
6. P. Thiyagarajan, M. Kottaisamy, K. Sethupathi, M. S. Ramachandra Rao,
Effect of Co-dopants on Colour Tunning of ZnS:Mn Yellow Phosphor
International symposium of Research Students on Material science and
Engineering (ISRS-2004), Dec-20–22 , 2004.
9
7. P. Thiyagarajan, M. Kottaisamy, K. Sethupathi and M. S. Ramachandra
Rao, A new red phosphor: Ba co-doped ZnS:Mn for Electroluminescent
(EL) display devices, 7th International conference on optoelectronics, fibre
optics and photonics cochin, India, Dec.9th 2004
8. M. Kottaisamy, P. Thiyagarajan, M .S. R Rao, SrS/ZnS:Mn
Blue/Green/Yellow emitting phosphor for application in white light
emitting phosphor converted Light Emitting Diodes (pcLEDs) ICMAT,
July 2005, Singapore.
9. M. Kottiasamy, P. Thiyagarajan and M. S. Ramachandra Rao,Pulsed laser
deposited Y3Al5O12 :Ce phosphor thin films for blue light converted white
light emitting diodes DAE BARNS 3rd National Symposium on Pulsed
Laser Deposition of the thin films and nanostructured materials at
Tirupathi, Nov 7-8th, 2005.
10. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, Pulsed laser
deposited Ca3MgSi2O8:Ce phosphor thin films for near UV LED converted
blue light emission, AE BARNS 3rd National Symposium on Pulsed Laser
Deposition of the thin films and nanostructured materials at Tirupathi,
Nov 7-8th, 2005.
11. P. Thiyagarajan, M. M. K. Samy and M. S. Ramachandra Rao, Synthesis
and luminescence properties of Ca3MgSi2O8: Eu phosphor for near UV
LED converted green light emission, International Conference on
Optoelectronic Materials and Thin films for Advanced Technology,
OMTAT-2005 t at Kochi, Kerala, India during October 24-27, 2005.
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12. J. Misra, M. Kottaisamy, P. Thiyagarajan, and M. S. Ramachandra Rao
Effect of co-dopants on the color tuning properties of YAG:Ce yellow
phosphor for application in white light emitting phosphor converted
Light Emitting Diodes (pcLEDs), International Conference on
Optoelectronic Materials and Thin films for Advanced Technology,
OMTAT-2005 at Kochi, Kerala, India during October 24-27, 2005.
13. P.Thiyagarajan, Atish Agrawal, M. Kottiasamy, M. S. R. Rao, Preparation
and luminescence properties of Ca3MgSi2O8:Ce phosphor for near UV
LED converted blue light emission International Conference on Advanced
Materials Development and Design, ICAMDD-2005 at Goa, India.
14. . P. Thiyagarajan, Brijesh Tiwari, M. Kottaisamy and M. S. Ramachandra
Rao, Near UV excitable Y2-x-yGdySiO5:Cex white light emitting phosphors
for white LED and display applications, at the Asian Society on
Information Displays (ASID06) held in Delhi, India from October 08-12,
2006.
15. M. Kottaisamy, P. Thiyagarajan and M. S. Ramachandra Rao, Diband
and Triband phosphor blends for near UV and blue LED converted white
light emitting diodes, Asian Society on Information Displays (ASID06)
held in Delhi, India , Oct. 08-12, 2006.
16. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, Pulsed laser
deposited oxide green emitting thin film phosphors : optimization of
growth conditions, MRS Fall Meeting, Nov 29-Dec 04, 2006, Bosten, USA.
11
17. P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao, Energy
transfer studies on Ca3MgSi2O8:Ce3+, Eu2+ phosphors for cool white light
emission, ISRS 2006, Dec 18-20, 2006, IITM, India.
18. Tiwari, M. Kottaisamy, P. Thiyagarajan, J. Misra and M. S. Ramachandra
Rao, Effect of crystal field on Ce3+ energy levels in La or Gd codoped
Y3Al5O12, VII Asian International Seminar on Atomic and Molecular
Physics (AISAMP7), Dec. 4-7 2006, IITM, Chennai, India.
19. V. Shankar, P. Thiyagarajan, G. Srinivasan, and V.Shanmugam,
Optimisation of aluminising for IN-718 and AISI316 stainless steel using
thermal spray diffusion process, International Heat Treat 2004, January
2004, organized by ASM India Chapter, Hotel Savera, Chennai.
20. P. Thiyagarajan, P. Palanichamy and T. Jayakumar, NDE of 9 Cr - 1Mo
Steels by Ultrasonics, Students National Technical Symposium 2000,
Regional Engg. College Trichi (RECT), India.
In Conference Proceedings:
1. “P. Thiyagarajan, M. Kottaisamy, K. Sethupathi and M. S. Ramachandra
Rao” Preparation and luminescent properties of SrS:Ce by addition of
sulphur as a co-activator in SrSO4:Ce(SO4)2.7H2O by carbothermal reduction,
Mater.Res.Soc.Symp. Proc. Vol. 829, 2005, B2.33.1
2. P. Thiyagarajan, M. Kottaisamy, K. Sethupathi and M. S. Ramachandra Rao
(2004) A new red phosphor: Ba co-doped ZnS:Mn for Electroluminescent (EL)
display devices 7th International conference on optoelectronics, fibre optics and
photonics cochin, India.
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3. “J. Misra, M. Kottaisamy, P. Thiyagarajan, and M. S. Ramachandra Rao”
(2005), “Effect of co-dopants on the color tuning properties of YAG:Ce yellow
phosphor for application in white light emitting phosphor converted Light
Emitting Diodes (pcLEDs)”, International Conference on Optoelectronic Materials
and Thin films for Advanced Technology, at Kochi, Kerala, India
4. “P. Thiyagarajan, Brijesh Tiwari, M. Kottaisamy and M. S. Ramachandra
Rao” (2006), Near UV excitable Y2-x-yGdySiO5:Cex white light emitting
phosphors for white LED and display applications, Asian Society on
Information Displays (ASID06) at Delhi, India.
5. “P. Thiyagarajan, M. M. K. Samy and M. S. Ramachandra Rao” (2005)
Synthesis and luminescence properties of Ca3MgSi2O8: Eu2+ phosphor for
near UV LED converted green light emission, “International Conference on
Optoelectronic Materials and Thin films for Advanced Technology”, at Kochi,
Kerala, India.
6. “P. Thiyagarajan, M. Kottaisamy and M. S. Ramachandra Rao” Pulsed laser
deposited oxide green emitting thin film phosphors : Optimization of growth
conditions, MRS Fall Meeting, Nov 29-Dec 04, 2006, Bosten, USA.
Name acknowledged in published Articles based on contribution:
1. Dong-Jin Yun and Shi-Woo Rhee, Thin Solid Films 517 (2009) 4644–
4649
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Research Experience Deposition of transparent conducting oxide (TCO), Al doped ZnO (AZO)
thin films on flexible substrates by r. f. magnetron sputtering.
Synthesized different rare-earth and transition metal ion doped inorganic
solid state materials like phosphates, silicates, oxides & sulphides and
investigated their structural and photoluminescent properties.
Synthesized materials by different routes namely – solid state reaction
method, carbothermal reduction, sol-gel and combustion synthesis (for
nanomaterials).
Growth of nanostructured thin films of various phosphors by pulsed laser
deposition (PLD) and Planar RF-Magnetron sputtering techniques.
Fabricated phosphors useful for phosphor converted white light emitting
diode (pcwLED) using GaN based LEDs.
D.C. Magnetron Sputtered-TiN, TiAlN and TiCN based hard coating for
wear and tear resistant applications – Optimizing the growth conditions –
property correlation (HEF India PVT Ltd).
Salt bath Nitriding of metallic components for wear, corrosion and tear
resistant applications - Optimizing the growth conditions - property
correlation – upon application (HEF India PVT Ltd)
Experimental Skills :
Synthesis Techniques:
High Temperature solid state reaction method
Gas-solid reactions under controlled
atmosphere
Carbothermal reduction
Sol-gel method
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Self propagating high temperature reaction
(Combustion synthesis)
Pulsed laser deposition (PLD) of phosphor thin
films under conditions viz., various gases
atmosphere, temperature, substrates, laser
power etc.
Planar R.F. Magnetron Sputtering technique
for the deposition of insulating,
semiconducting and metallic thin films.
Characterization:
Powder X-ray Diffraction
Photoluminescence spectroscopy (PL)
Diffuse Reflectance Spectroscopy (DRS)
UV-Visible Spectroscopy
Fourier Transform - Infrared spectroscopy
(FT-IR)
Thermal analyses (TGA/DTA)
Scanning electron microscopy (SEM)
Transmission, absorption and reflectance
spectra of thin films
Four probe method for thin film resistivity
measurements
Commission Internationale de l’Eclairage
(CIE) chromaticity colour coordinates.
15
Instruments handled :
Powder X-ray diffractometer – Rich Seifert, P
3000, Germany
Spectrofluorometer – JOBINYVON
Spectroflurolog, USA
UV-Vis spectrometer – Jasco, V-560, Japan
UV-Vis spectrometer – Perkin Elmer – USA
Spectrometer – Ocean Optic USB2000- USA
High temperature furnaces – Muffle & tubular
with SiC heating element
Pulsed laser deposition (PLD) unit, frequency
tripled Nd:YAG laser, Brilliant France
Planar R.F.Magnetron Sputtering unit
HindHivac, India.
Assisted in procuring, installing, trouble
shooting and maintaining PVD equipment
Faithfully yours
P.Thiyagarajan