Research Publications:

• Reducing recombination losses in planar organic photovoltaic cells using multiple step charge separation
  T. D. Heidel¹, D. Hochbaum¹, J. M. Sussman², V. Singh¹, M. E. Bahlke¹, I. Hiromi¹, J. Lee¹, and M. A. Baldo^{1
  1}Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  ²Department of Material Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
  (Received 1 February 2011; accepted 30 March 2011; published online 16 May 2011)

  Abstract: We enhance the efficiency of heterojunction organic solar cells by introducing a thin interfacial layer between the acceptor and donor layers. The interfacial layer energy levels are chosen to provide a gradient for charges crossing the interface, approximating a conventional p-n junction with three organic semiconductors. Devices with interfacial layers exhibit increased open circuit voltage (Voc) and increased short circuit current (Jsc). The increase in Voc is due to a reduction in dark current and charge recombination. The increase in Jsc is correlated with an increase in the conversion efficiency of excitons originating in the donor or acceptor layers. The interfacial layer destabilizes charge transfer states at the donor-acceptor interface, yielding reduced exciton recombination. The introduction of thin interfacial layers may prove to be an important probe of the physics of exciton separation in organic photovoltaic cells. VC 2011 American Institute of Physics. Full-text article [doi:10.1063/1.3585863]

• Divyans Mahansaria, CSE, SRM, Mahansaria, Samarpan Shyam, Anup Samuel, Ravi Teja, MIT presented and published "A fast and secure software solution [ss7.0] that counters shoulder surfing attack" in IASTED international Conference on Software Engg. & Applications (SEA09) held from 2-4 Nov.,09 at Cambridge, MIT, USA.
• Preparation, Characterization and Antimicrobial activity of a Bio-composite Scaffold containing Chitosan/ nano-Hydroxyapatite/ nano-Silver for Bone Tissue Engineering.
  S. Saravanan, S. Nethala, S. Pattnaik, A. Tripathi, A. Moorthi and N. Selvamurugan (2011) International Journal of Biological Macromolecules, in press; Impact factor: 2.366
• Enhanced Osteoblast Adhesion on Polymeric Nano-Scaffolds for Bone Tissue Engineering.
  N. Saranya, S. Saravanan, A. Moorthi, B. Ramyakrishna and N. Selvamurugan (2011) Journal of Biomedical Nanotechnology, in press; Impact factor: 1.588
• Chitosan and its derivatives for gene delivery.
  N. Saranya, A. Moorthi, S. Saravanan, M. P. Devi and N. Selvamurugan (2011) International Journal of Biological Macromolecules 48: 234-238; Impact factor: 2.366
• Synthesis and Characterization of nanoscale-Hydroxyapatite-Copper for Antimicrobial Activity towards Bone Tissue Engineering Applications.
  K. Sahithi, M. Swetha, M. Prabaharan, A. Moorthi, N. Saranya, K. Ramasamy, N. Srinivasan, N. C. Partridge and N. Selvamurugan (2010) Journal of Biomedical Nanotechnology 6: 333-339; Impact factor: 1.588
• Biocomposites containing Natural Polymers and Hydroxyapatite for Bone Tissue Engineering.
  M. Swetha, K. Sahithi, A. Moorthi, K. Ramasamy, N. Srinivasan and N. Selvamurugan (2010) International Journal of Biological Macromolecules 47: 1-4; Impact factor: 2.366
• Polymeric composites containing carbon nanotubes for bone tissue engineering.
  K. Sahithi, M. Swetha, K. Ramasamy, N. Srinivasan and N. Selvamurugan (2010) International Journal of Biological Macromolecules 46: 281-3; Impact factor: 2.366