326 citations · 1.7k across the 59 of their papers we have counts for
13 papers · 1 filter
Wavefunction-Based Analysis of Dynamics Versus Yield of Free Triplets in Intramolecular Singlet Fission
Rafi Chesler, Souratosh Khan, Sumit Mazumdar
Experiments in several intramolecular singlet fission materials have indicated that the triplet-triplet spin biexciton has a much longer lifetime than believed until recently, open…
Correlated-electron description of the photophysics of thin films of -conjugated polymers
D. Psiachos, S. Mazumdar
We extend Mulliken's theory of ground state charge transfer in a donor-acceptor complex to excited state charge transfer between pairs of identical -conjugated oligomers, one of…
Universality in the Photophysics of pi-Conjugated Polymers and Single-Walled Carbon Nanotubes
Sumit Mazumdar, Zhendong Wang, Hongbo Zhao
We describe both pi-conjugated polymers and semiconducting single-walled carbon nanotubes because of the remarkable similarities in their behavior under photoexcitation. The common…
Photophysics of charge-transfer excitons in thin films of π-conjugated polymers
Zhendong Wang, Sumit Mazumdar, Alok Shukla
We develop a theory of the electronic structure and photophysics of interacting chains of π- conjugated polymers to understand the differences between solutions and films. While ph…
Electron-electron interaction effects on the photophysics of metallic single-walled carbon nanotubes
Zhendong Wang, Demetra Psiachos, Roberto F. Badilla +1
Single-walled carbon nanotubes are strongly correlated systems with large Coulomb repulsion between two electrons occupying the same orbital. Within a molecular Hamiltonian a…
pi-Electron theory of transverse optical excitons in semiconducting single-walled carbon nanotubes
Zhendong Wang, Hongbo Zhao, Sumit Mazumdar
We present a quantitative theory of optical absorption polarized transverse to the tube axes in semiconducting single-walled carbon nanotubes. Transverse optical absorption in semi…
Pinned Low Energy Electronic Excitation in Metal Exchanged Vanadium Oxide Nanoscrolls
J. Cao, J. L. Musfeldt, S. Mazumdar +2
We measured the optical properties of mixed valent vanadium oxide nanoscrolls and their metal exchanged derivatives in order to investigate the charge dynamics in these compounds.…
Elucidation of the electronic structure of semiconducting single-walled carbon nanotubes by electroabsorption spectroscopy
Hongbo Zhao, Sumit Mazumdar
We report benchmark calculations of electroabsorption in semiconducting single-walled carbon nanotubes to provide motivation to experimentalists to perform electroabsorption measur…
Quantitative calculations of the excitonic energy spectra of semiconducting single-walled carbon nanotubes within a -electron model
Zhendong Wang, Hongbo Zhao, Sumit Mazumdar
Using Coulomb correlation parameters appropriate for -conjugated polymers (PCPs), and a nearest neighbor hopping integral that is arrived at by fitting the energy spectra of thr…
Electron-electron interaction effects on optical excitations in semiconducting single-walled carbon nanotubes
Hongbo Zhao, Sumit Mazumdar
We report correlated-electron calculations of optically excited states in ten semiconducting single-walled carbon nanotubes with a wide range of diameters. Optical excitation occur…
Designing pi-conjugated polymers with light emission in the infrared
S. Mazumdar, S. Dallakyan, M. Chandross
There is currently a great need for solid state lasers that emit in the infrared. Whether or not conjugated polymers that emit in the IR can be synthesized is an interesting theore…
Prediction of infrared light emission from pi-conjugated polymers: a diagrammatic exciton basis valence bond theory
S. Dallakyan, M. Chandross, S. Mazumdar
There is currently a great need for solid state lasers that emit in the infrared, as this is the operating wavelength regime for applications in telecommunications. Existing --c…
Electron-hole versus exciton delocalization in conjugated polymers: the role of topology
S. Dallakyan, M. Chandross, S. Mazumdar
There is currently a great need for solid state lasers that emit in the infrared. Whether or not conjugated polymers that emit in the IR can be synthesized is an interesting theore…