Faculty Details

Name

Dr. L. Balakrishnan

Earned Degree/Diploma

M.Sc., Ph.D

Current Designation

Assistant Professor

Department

Physics

Contact Phone Number

9944881875

Email (Official Preferred)

lbalakrishnan@gct.ac.in

Publications

Research Areas:

1. Semiconductor nanostructures for photodetector application and fabrication of photodetectors

2. Semiconductor based gas sensor

3. Fiber optic sensors

4. Fabrication of ZnO based p-n junction of optoelectronics applications

5. Fabrication of solar cells

6. Multiferroic materials for memory device and magnetic sensor applications

 

Articles in International Journals

  1. S. Narasimman, Kiran Mahararana, S.K. Kokila, L. Balakrishnan*, Z.C. Alex (2018) Al2O3-MgO nanocomposite based fiber optic temperature sensor. Materials Research Express, https://doi.org/10.1088/2053-1591/aadd41 (Impact factor –1.151).
  2. S. Narasimman, L. Balakrishnan*, Z.C. Alex (2018) Fiber optic magnetic field sensor using Co doped ZnO nanorods as cladding. RSC Advances 8, 18243-18251(Impact factor –3.108).
  3. S. Narasimman, L. Balakrishnan*, Z.C. Alex (2017) Fiber optic ammonia sensor based on amine functionalized ZnO nanoflakes. IEEE Sensors Journal 18, 201-208 (Impact factor –3.108).
  4. Anju Anna Jacob, L. Balakrishnan*, K. Shambavi, Z.C. Alex (2017) Multi-band visible photoresponse study of Co2+ doped ZnO nanoparticles. RSC Advances 7, 39657-39665 (Impact factor –3.108).
  5. S. Narasimman, L. Balakrishnan*, S. R. Meher, R. Sivacoumar, Z. C. Alex (2017) Influence of surface functionalization on the gas sensing characteristics of ZnO nanorhombuses. Journal of Alloys and Compounds 706, 186-197 (Impact factor –3.133).
  6. M. Velumani, S. R. Meher, L. Balakrishnan, R. Sivacoumar, E. Rufus, Z. C. Alex (2017) Zn Alloyed SnO2 Nanomaterials Based Humidity Sensors. Sensor Letters 15, 424-431(Impact factor –0.773).
  7. S. Narasimman, U. Dinesh, L. Balakrishnan*, S. R. Meher, R. Sivacoumar, Z. C. Alex (2017) A Comparative Study on Structural, Optical and Humidity Sensing Characteristics of ZnO, SnO2 and ZnO: SnO2 Nanocomposite.  Sensor Letters 15, 440-447 (Impact factor –0.773).
  8. Anju Anna Jacob, L. Balakrishnan*, S. R. Meher, K. Shambavi, Z.C. Alex (2017) Zn1-XCdxO Nanoparticles By Co-Precipitation: Structural, Optical And Photodetection Analysis. International Journal of Nanoscience 16, 1760015 (Impact factor –0.560).
  9. Anju Anna Jacob, L. Balakrishnan*, S. R. Meher, K. Shambavi, Z.C. Alex (2017) Structural, optical and photodetection characteristics of Cd alloyed ZnO thin film by spin coating. Journal of Alloys and Compounds 695, 3753-3759 (Impact factor –3.133).
  10. S. R. Meher, L. Balakrishnan, Z. C. Alex (2016) Analysis of Cu2ZnSnS4/CdS based photovoltaic cell: A Numerical simulation approach. Superlattices and Microstructures 100, 703-722 (Impact factor – 2.123).
  11. L. Balakrishnan*, S. Gokul Raj, S.R. Meher, K. Asokan and Z. C. Alex (2016) Impact of 100 MeV Ag7+ SHI irradiation fluence and N incorporation on structural, optical, electrical and gas sensing properties of ZnO thin films. Applied Physics A 119, 1541-1553 (Impact factor –1.694).
  12. L. Balakrishnan*, S. R. Meher and Z. C. Alex (2015) Effect of irradiating ion fluence on optical properties of ZnO1-x:Nx thin films. Radiation Effects and Defects in Solids 170, 84-90 (Impact factor –0.6).
  13. L. Balakrishnan*, S. Gowrishankar, and N. Gopalakrishnan (2014) A comparative study on p-ZnO:AlAs/n-ZnO:Al and p-ZnO:AlAsN/n-ZnO:Al bilayer homojunction diodes performance. ECS Solid State Letters 3, Q20-Q23 (Impact factor – 2.010).
  14. L. Balakrishnan, S.R. Barman and N. Gopalakrishnan (2013) p-type formation mechanism of codoped and tridoped ZnO thin films. Science of Advanced Materials 5, 462-468 (Impact factor – 1.812).
  15. L. Balakrishnan, S. Gowrishankar and N. Gopalakrishnan (2013) NH3 sensing by p-ZnO thin films. IEEE Sensors Journal 13, 2055–2060 (Impact factor – 1.889).
  16. L. Balakrishnan, S. Gowrishankar and N. Gopalakrishnan (2012) Fabrication of tridoped p-ZnO thin film and homojunction by RF magnetron sputtering. Ceramics International 38, 6221–6227 (Impact factor – 2.758).
  17. L. Balakrishnan and N. Gopalakrishnan (2012) Fabrication of Al3+ and large radii mismatch As5+ codoped p-ZnO thin film and homojunction. Thin Solid Films 520, 5702–5705 (Impact factor – 1.604).
  18. L. Balakrishnan, S.  Gowrishankar, P. Premchander and N. Gopalakrishnan (2012) Dual codoping for the fabrication of low resistive p-ZnO. Journal of Alloys and Compounds 512, 235–240 (Impact factor – 3.014).
  19. L. Balakrishnan, S. Gowrishankar, J. Elanchezhiyan and N. Gopalakrishnan (2011) Influence of Al concentration on electrical, structural and optical properties of Al–As codoped p-ZnO thin films. Physica B 406, 4447–4452 (Impact factor – 1.352).
  20. L. Balakrishnan, P. Premchander, T. Balasubramanian and N. Gopalakrishnan (2011) AlN codoping and fabrication of ZnO homojunction by RF sputtering. Vacuum 85, 881–886 (Impact factor – 1.558).
  21. S.R. Meher, L. Balakrishnan and Z.C. Alex (2016) Analysis of Cu2ZnSnS4/CdS based photovoltaic cell: A numerical simulation approach. Superlattices and Microstructures 100, 703-722 (Impact factor – 2.117).
  22. Anju Anna Jacoba, L. Balakrishnan*, S. R. Meher, R. Sivacoumar, K. Shambavi and Z. C. Alex (2015) Ammonia Sensing Characteristics of p-CuO and n-ZnO Thin Films: A Comparative Study. International Journal of Applied Engineering Research 10, 11-14 (Impact factor – 0.7).
  23. N. Gopalakrishnan, L. Balakrishnan, B. Arunkumar and S. Gowrishankar (2014) Optimization of CuO ultra-thin film for gas sensor application by RF magnetron sputtering. Journal of Nanoelectronics and Optoelectronics 9, 496-501 (Impact factor – 0.580).
  24. N. Gopalakrishnan, L. Balakrishnan, M. Suganya and S. Gowrishankar (2013) Influence of oxygen partial pressure on ferromagnetic switching characteristics of ZnO:Cr thin films. Composite Interfaces 20, 221-228 (Impact factor – 0.630).
  25. N. Gopalakrishnan, L. Balakrishnan, A. Brindha and G. Jayalakshmi (2012) Thickness and substrate orientation dependence of ferromagnetism in Mn doped ZnO thin films. Crystal Research and Technology 47, 45–52 (Impact factor – 1.120).
  26. N. Gopalakrishnan, L. Balakrishnan, V. Senthamizh Pavai, J. Elanchezhiyan and T. Balasubramanian (2011) Characterization of (ZnO)1-x(AlN)x/ZnO junction for optoelectronic applications. Current Applied Physics 11, 834–837 (Impact factor – 2.144).
  27. N. Gopalakrishnan, L. Balakrishnan, K. Latha and S. Gowrishankar (2011) Influence of substrate and film thickness on structural, optical and electrical properties of ZnO thin films. Crystal Research and Technology 46, 361–367 (Impact factor – 1.120).
  28. N. Gopalakrishnan, L. Balakrishnan, B. Srimathy, M. Senthil Kumar and T. Balasubramanian (2010) Vacancy mediated room temperature ferromagnetism in Zn1-xMnxO thin films. Physica Status Solidi A 207, 2180–2184 (Impact factor – 1.469).
  29. K.S. Pugazhvadivu, L. Balakrishnan, K. Tamilarasan (2015) Structural, magnetic and electrical properties of calcium modified bismuth manganite thin films. Materials Chemistry and Physics 155, 147-154 (Impact factor – 2.126).
  30. K. S. Pugazhvadivu, L. Balakrishnan, G. Mohan Rao, and K. Tamilarasan (2014) Room temperature ferromagnetic and ferroelectric properties of Bi1− xCaxMnO3 thin films. AIP Advances 4, 117105 (Impact factor – 1.444).
  31. S.R. Meher and L. Balakrishnan (2014) Photocatalytic and Electrochromic properties of sol-gel derived nanocrystalline TiO2 thin films for Self-cleaning Smart window Applications. Materials Science in Semiconductor Processing 26, 251-258 (Impact factor – 2.264).
  32. R.N. Lokesh, L. Balakrishnan, N. Gopalakrishnan, K. Jeganathan, Samar Layek and H.C. Verma (2014) Role of surface functionalisation on ZnO:Fe nanostructures. Materials Science and Engineering: B 183, 39-46 (Impact factor – 2.331).
  33. S. Gowrishankar, L. Balakrishnan and N. Gopalakrishnan (2014) Band gap engineering in Zn(1-x)CdxO and Zn(1-x)MgxO thin films by RF Sputtering. Ceramics International 40, 2135-2142 (Impact factor – 2.758).
  34. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2015) Influence of Substrate and Ca Substitution on Perovskite Bismuth Manganite Thin Films: A Comparative Study. Bulletin of Materials Science 38, 1099–1104 (Impact factor – 0.895).
  35. S. Muthuraja, L. Balakrishnan, K. Govardhan, S. Mohana Roopan and S. Manoj kumaran (2015) Structural, optical, morphological and organic vapours sensing properties of SnO2 nanostructure. Journal of the Indian Chemical Society 92, 755-759 (Impact factor – 0).
  36. S. Gowrishankar, L. Balakrishnan and N. Gopalakrishnan (2013) Fabrication of p-ZnO thin films from ZrN mixed ZnO targets. Composite Interfaces 20, 623-634 (Impact factor – 1.046).
  37. S. Gowrishankar, L. Balakrishnan, T. Balasubramanian and N. Gopalakrishnan (2013) Fabrication of n-Zn1-xGaxO and p-(ZnO)1-x(GaP)x thin films and homojunction. Materials Science and Engineering B 178, 31– 38 (Impact factor – 1.846).
  38. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2012) Effect of substrate and Ca doping on the properties of BiMnO3 thin films by RF magnetron sputtering. Materials Letters 77, 48–50 (Impact factor – 2.437).
  39. S. Gowrishankar, L. Balakrishnan, J. Elanchezhiyan, T. Balasubramanian and N. Gopalakrishnan (2011) Realization of p-ZnO thin films by GaP codoping. Physica B, 406, 4085–4088 (Impact factor – 1.327).
  40. N. Gopalakrishnan, S. Bhuvaneshwari, L. Balakrishnan and S. Gowrishankar (2013) Hydrothermal Synthesis and Gas Sensing Properties of CuO Nanorods. Sensor Letters 11, 2233-2240 (Impact factor – 0.558).
  41. N. Gopalakrishnan, S. Gowrishankar, T. R. Devidas and L. Balakrishnan (2012) Optimization of Anodic Layer and Fabrication of Organic Light Emitting Diode. Advanced Materials Research 488–489, 1348–1352 (Impact factor – 0.23).
  42. K. Vinoth Babu, G. Ramachandra Reddy and L. Balakrishnan* (2014) Spectral Efficiency Improvement in OFDMA Systems with Modified Adaptive Subcarrier Spacing Based Resource Allocation Algorithm. HKIE Transactions 21, 158-169 (Impact factor – 0).

 

Book Chapters:

  1. S. Narasimman, L. Balakrishnan*, S.R. Meher, R. Sivacoumar, Elizabeth Rufus and Z.C. Alex (2016) Fabrication ZnO thin film based VOC sensor. Recent Trends in Material Science and Applications, Springer.
  2. K.S. Pugazhvadivu, K. Saravanakumar, L. Balakrishnan and K. Tamilarasan (2011) Preparation and Studies on Multiferroic Bismuth Manganite thin films by RF sputtering, Macmillan Advanced Research Series.

 

Papers Published in International Magazine:

  1. S. Narasimman, K. Harish Babu, L. Balakrishnan*, S.R. Meher, R. Sivacoumar and Z.C. Alex (2017) Fabrication of fiber optic based temperature sensor. Materials Today.

 

International Conference Journal Publications:

  1. S. Narasimman, L. Balakrishnan*, S. R. Meher, R. Sivacoumar, Elizabeth Rufus and Z. C. Alex (2016) Fabrication of ZnO Thin Film based VOC Sensor. International Conference on Recent Trends in Materials Science and Applications (ICRTMSA 2016), Jamal Mohamad College, Tiruchirappalli, February 2016 (Springer Proceedings in Physics).
  2. S. Narasimman, L. Balakrishnan*, S.R. Meher, R. Sivacoumar and Z.C. Alex (2015) ZnO Nanoparticles Based Fiber Optic Gas Sensor. Department of Atomic Energy-Solid State Physics Symposium (DAE-SSPS 2015), AMITY University, Noida, December 2015 (AIP Conference Proceedings).
  3. M. Velumani, S. R. Meher, L. Balakrishnan, R. Sivacoumar and Z. C. Alex (2015) ZrO2-ZnO composite thin films for humidity sensing. Department of Atomic Energy-Solid State Physics Symposium (DAE-SSPS 2015), AMITY University, Noida, December 2015 (AIP Conference Proceedings).
  4. K. S. Pugazhvadivu, M. Santhiya, L. Balakrishnan, and K. Tamilarasan (2015) Structural and morphological studies on Bi1-xCaxMnO3 thin films grown by RF magnetron sputtering. Department of Atomic Energy-Solid State Physics Symposium (DAE-SSPS 2015), AMITY University, Noida, December 2015 (AIP Conference Proceedings).
  5. M. Santhiya, K. S. Pugazhvadivu, L. Balakrishnan, and K. Tamilarasan (2015) Effect of RF power on structural and magnetic properties of La doped Bi2Fe4O9 thin films. Department of Atomic Energy-Solid State Physics Symposium (DAE-SSPS 2015), AMITY University, Noida, December 2015 (AIP Conference Proceedings).
  6. K.S. Pugazhvadivu, L. Balakrishnan, and K. Tamilarasan (2014) Influence of calcium on structural and morphological properties of BiMnO3 thin films. Department of Atomic Energy- Solid State Physics Symposium (DAE - SSPS 2014), VIT University, Vellore, December 2014 (AIP Conference Proceedings).
  7. S. Gowrishankar, L. Balakrishnan and N. Gopalakrishnan (2012) Fabrication of p-ZnO thin films by ZrN codoping. SPIE Optics+Photonics 2012, San Diego, USA, August 2012 (SPIE Proceedings).
  8. L. Balakrishnan, S. Gowrishankar and N. Gopalakrishnan (2011) Fabrication of ZnO homojunction by Al-As-N tridoping. International Semiconductor Device Research Symposium 2011 (ISDRS 2011), University of Maryland, Maryland, USA, December 2011 (IEEE Xplore).
  9. L. Balakrishnan, S. Gowrishankar and N. Gopalakrishnan (2011) Realization of low resistive p-ZnO thin film by Al-As codoping. Department of Atomic Energy- Solid State Physics Symposium (DAE - SSPS 2011), SRM University, Chennai, India, December 2011 (AIP Conference Proceedings).
  10. S. Gowrishankar, L. Balakrishnan, T. Balasubramanian and N. Gopalakrishnan (2011) Realization of              n-ZnO:Ga/p-ZnO:GaP homojunction by RF magnetron sputtering. International Semiconductor Device Research Symposium 2011 (ISDRS 2011), University of Maryland, Maryland, USA, December 2011 (IEEE Xplore).
  11. S. Gowrishankar, L. Balakrishnan and N. Gopalakrishnan (2011) Structural, electrical and optical properties of GaP codoped ZnO thin films. Department of Atomic Energy- Solid State Physics Symposium (DAE - SSPS 2011), SRM University, Chennai, India December 2011 (AIP Conference Proceedings).

 

 

Papers Presented in National/International Conferences

  1. L. Balakrishnan and S. R. Meher (2014) Effect of 100 MeV Ag7+ irradiating ion fluence on optical properties of ZnO1-x:Nx thin films. International Conference on Materials and Characterization Techniques 2014 (ICMCT 2014), VIT University, Vellore, March 2014.
  2. L. Balakrishnan, S. Gowrishankar, J. Elanchezhiyan, B.C. Shin, T. Balasubramanian and                                  N. Gopalakrishnan (2010) Dual codoping for the fabrication of low resistive p-ZnO. The 16th International Conference on Crystal Growth (ICCG-16), Chinese Academy of Sciences, Beijing, China, August 2010.
  3. L. Balakrishnan, S. Gowrishankar, T. Balasubramanian and N. Gopalakrishnan (2010) Fabrication of p-n junction with ZnO nanostructures by a novel approach. International Conference on “Synthesis, Characterization Consolidation and Modelling of Nanomaterials” (ICON-2010), PSG College of Technology, Coimbatore, March 2010.
  4. L. Balakrishnan, G. Jayalakshmi, B. Srimathy, M. Senthilkumar, T. Balasubramanian and                                   N. Gopalakrishnan (2010) Vacancy mediated ferromagnetism in Zn0.85Mn0.15O nanostructures. International Conference on “Synthesis, Characterization Consolidation and Modelling of Nanomaterials” (ICON-2010), PSG College of Technology, Coimbatore, March 2010.
  5. L. Balakrishnan, J. Elanchezhiyan, K.P. Bhuvana, T. Balasubramanian and N. Gopalakrishnan (2009) AlN doped (Codoped) ZnO films for the fabrication of p-ZnO. 38th National Seminar on Crystallography (NSC-38), University of Mysore, Karnataka, India, February 2009.
  6. S. R. Meher and L. Balakrishnan (2014) Numerical simulation and analysis of Cu2ZnSnS4 based thin film solar cells. International Conference on Materials and Characterization Techniques 2014 (ICMCT 2014), VIT University, Vellore, March 2014.
  7. R. N. Lokesh, L. Balakrishnan, J. Kulandaivel and N. Gopalakrishnan (2013) Synthesis and characterisation of ZnO Hierarchical Nanoflowers, Multilinked and High Aspect Nanorods. 7th International conference on materials for advanced Technologies, Suntec, Singapore, June - July 2013.
  8. S. Bhuvaneshwari, L. Balakrishnan and N. Gopalakrishnan (2013) Synthesis of CuO nanostructures for gas sensing studies, 7th International conference on materials for advanced Technologies, Suntec, Singapore, June - July 2013.
  9. N. Gopalakrishnan, L. Balakrishnan, M. Suganya, S. Gowrishankar and G. Jayalakshmi (2011) Effects of oxygen partial pressure on Zn0.95Cr0.05O thin films grown by RF sputtering. International Conference on Nanoscience and Nanotechnology (ICNN 2011), Coimbatore Institute of Technology, Coimbatore, India, July 2011.
  10. K. Latha, L. Balakrishnan, T. Balasubramanian and N. Gopalakrishnan (2009) Effect of thickness and substrate on ZnO thin films by RF sputtering. 38th National Seminar on Crystallography, Mysore University, Karnataka, India, February 2009.
  11. B. Srimathy, L. Balakrishnan, J. Elanchezhiyan, T. Balasubramanian and N. Gopalakrishnan (2009) Influence of oxygen pressure on Zn1-xMnxO thin films by RF sputtering. 38th National Seminar on Crystallography, Mysore University, Karnataka, India, February 2009.
  12. N. Gopalakrishnan, S. Gowrishankar, T.R. Devidas and L. Balakrishnan (2012) Optimization of anodic layer and fabrication of organic light emitting diode. 2nd International Conference on Key Engineering Materials (ICKEM 2012), Singapore, February 2012.
  13. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2012) Structural, electrical and magnetic properties of Multiferroic BiMnO3:Ca thin films. International Conference on Materials Science and Technology (ICMST-2012), St. Thomas College Pala, Kerala, India, June 2012.
  14. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2012) Effect of Temperature and calcium doping on the properties of Bismuth Manganite thin films. International conference on Recent Trends in Advanced Materials (ICRAM-2012), VIT University, Vellore, India, February 2012.
  15. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2011) Preparation and Studies on Multiferroic Bismuth Manganite thin films by RF sputtering. International conference on Advanced Materials (ICAM-2011), PSG College of Technology, Coimbatore, December 2011.
  16. K.S. Pugazhvadivu, L. Balakrishnan and K. Tamilarasan (2011) Effect of substrate and calcium doping on the properties of Bismuth Manganite thin films. National conference on Recent trends in Materials Science (NCRTMS-2011), Jaypee University of Information Technolgy (JUIT), Himachal Pradesh, India, December 2011.
  17. Etc.

 

​Research Skills:

  • Experienced in handling RF magnetron sputtering, Thermal evaporation, powder X-ray diffractometer, Vibrating sample magnetometer, Photoluminescence spectrometer, TG/DTA, Transmission electron microscope, Scanning electron microscope, Atomic force microscope, Optical microscope, UV-Vis-NIR spectrometry, Raman Spectroscope and Fourier transform infrared spectrometer.
  • Familiar with XRD, PL, AFM, Electrical, XPS, SIMS and VSM analysis.
  • Experienced in the preparation of nanomaterials by hydrothermal, hydrolysis and sol-gel methods.

 

Company Experience

Working as a Technical Consultant (part time) since Jan. 2009 in Spektron Instruments Inc.

A - 35/ 6, 5th Street, Periyar Nagar

Chennai - 600082, Tamil Nadu.

 

Other Experiences

  • Served as a 'Residential Students Councilor' for Coral Hostel Students in National Institute of Technology, Tiruchirappalli from Aug. 2009 to Jan. 2013.
  • Served as a 'Vice President' for a trust naming "Helping Hands of NITT" from May 2010 to May 2012.