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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 thiyagarajan@annauniv.edu

thiyagarajan03@gmail.com

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 (*,#)

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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. (msrrao@iitm.ac.in)

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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

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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.

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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.

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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.

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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.

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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