Research Interests
Soft condensed matter physics

Research Areas:

• Organic displays and photovoltaics
• Optical spectroscopy of organic/inorganic semiconductors
• Charge transport studies in organic devices
• Theoretical modeling of the vibrational spectra in organic molecules/polymers

Our current research activities involve fabrication and characterization of light emitting displays, field effect transistors, and solar cells using organic polymers and molecules. Over the past four years our group has made great progress in deciphering structure-property relationships in blue-emitting polymers at the nanoscale level using light scattering techniques, and their applications in organic optoelectronics. A major focus of our work is on probing metal-organic interfaces using light scattering techniques. Our goal within the next few years is to obtain full capabilities at MU to fabricate and characterize organic optoelectronic devices with a major emphasis on the development of light weight, flexible, and efficient organic solar cells based on polymer nanoparticles.

Selected recent publications
M. Arif , S. Guha , A. Tsami, and U. Scherf, "Probing electronic excitations in organic light-emitting diodes via Raman scattering", Applied Physics Letters 90, 252105 (2007). (link)

C. Volz, M. Arif, and, S. Guha , "Conformations in di-octyl substituted polyfluorene: a combined theoretical and experimental Raman scattering study", The Journal of Chemical Physics 126, 064905 (2007). (link)

M. Arif, M. Yun, S. Gangopadhyay, K. Ghosh, L. Fadiga, F. Galbrecht, U. Scherf, and, S. Guha, " Polyfluorene as a model system for space-charge-limited conduction", Physical Review B 75, 195202 (2007). (link)

M. Arif, C. Volz, and, S. Guha, "Chain morphologies in semi-crystalline polyfluorene: evidence from Raman scattering", Physical Review Letters 96, 025503 (2006). (link)

M. Yun, R. Ravindran, M. Hossain, S. Gangopadhyay, U. Scherf, T. Bünnagel, F. Galbrecht, M. Arif and, S. Guha, "Capacitance-voltage characterization of polyfluorene-based metal-insulator-semiconductor diodes", Applied Physics Letters 89, 013506 (2006). (link)

S. Guha and K. Nakamoto, "Electronic structures and spectral properties of endohedral fullerenes", Coordination Chemistry Reviews 249, 1111 (2005). (link)

For a complete list of publications, please see "Publications".