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Recent News

04/11/2014:
Congratulations to Jesse Kohl on his successful PhD thesis defense.

04/07/2014:
Congratulations to Sarah Goodman for successfully defending her undergraduate senior thesis with highest honors.

04/04/2014:
Congratulations to Gary Cheung for winning the 1st place award in the MGM Symposium Undergraduate Senior Thesis Poster Competition.

04/02/2014:
Congratulations to Zeqing Shen on passing her in-field research proposal.

12/02/2013 - 12/06/2013:
Chris, Gary, Zeqing, Jesse, Sarah, Divya and Binxing gave presentations of their recent research at the MRS Fall conference in Boston. Topics presented were: light management and electrode structures for polymer optoelectronics;  synthesis and characterization of nanoscale SPASERs and spectroscopy of single optical frequency nanoantennas.

10/17/2013:
The paper "Enhancing Surface Plasmon Leakage at the Metal/Semiconductor Interface: Towards Increased Light Outcoupling Efficiency in Organic Optoelectronics," by Kohl et al., was accepted for publication in Optics Express.

10/2013:
Congratulations to Gary Cheung who was awared a New Jersey Space Grant Consortium Academic Year Fellowship for the 2013-2014 academic year.

09/27/2013:
The paper "Direct Computational Comparison of Conventional and Inverted Organic Photovoltaic Performance Parameters with Varying Metal Electrode Surface Workfunction," by Petoukhoff et al., was accepted for publication in Solar Energy Materials and Solar Cells.

09/2013:
Welcome to Benjamin who joins us from Ghana for a graduate research internship, and AiMei our newest undergraduate researcher.

07/11/2013:
The review paper "Conjugated Polymer-Based Photonic Nanostructures" was accepted for publication in the journal Polymer Chemistry.

06/08/2013:
The paper "Absorption and Scattering Effects by Silver Nanoparticles Near the Interface of Organic / Inorganic Semiconductor Tandem Films," by Nemes et al. was accepted for publication by the Journal of Nanoparticle Research.

More news here...
   
  O'Carroll Research Group
Nanophotonics and Organic Optoelectronics
 
     
The O'Carroll Group studies light generating and light harvesting processes in organic polymer semiconductor materials and plasmonic nanostructures. Our research has a number of end-uses such as: light-management in thin-film organic opto-electronic devices; optically-active electrodes; nanoscale optical devices; and environmentally-friendly electronics and photonics.

Research Topics Include: Recent Research Highlights:
Nanophotonics for Organic Optoelectronics.
We develop approaches to integrate nanophotonic and plasmonic structures in large-area organic opto-electronic devices such as solar cells, light-emitting diodes and lasers. In doing so, nanoscale structure phenomena can be utilized on macroscopic length scales to improve opto-electronic device quantum efficiency and enable efficient light-management in the active semiconductor material.

Photophysics of Organic Conjugated Polymer Semiconductors.
The photophysics, exciton and electron generation and transfer, and electronic processes in conjugated polymer materials depend sensitively on processing conditions. We study the interplay between process-induced molecular ordering and nanoscale confinement on the photophysical properties of conjugated polymer materials such as polyfluorenes and polythiophenes, as well as, soluble-derivatives of small conductive organic molecules such as phthalocyanines and fluorene-based conjugated oligomers.

Nanoscale Antennas, Waveguides, Cavities and Lasers.
We employ non-lithographic templating techniques to fabricate nanoscale photonic devices such as optical-frequency nanoantenna heterostructures, and organic polymer nanowire lasers and active waveguides. In particular, we study how plasmonic nanoantennas can modify and enhance the absorption and emission rate in organic semiconductor materials and how molecular ordering improves nanoscale organic photonic device performance.

Enhancing Surface Plasmon Leakage at the Metal/Semiconductor
      Interface: Towards Increased Light Outcoupling Efficiency
in Organic Optoelectronics
      J. Kohl, J. A. Pantina, D. M. O'Carroll
       Opt. Express 22, 7644-7656 (2014).



Computational Comparison of Conventional and Inverted
Organic Photovoltaic Performance Parameters with Varying Metal Electrode Surface Workfunction.
C. E. Petoukhoff, D. K. Vijapurapu, D. M. O'Carroll
Sol. Energ. Mat. Sol. Cells, 120, 572-583 (2014).



Absorption and Scattering Effects by Silver Nanoparticles Near the Interface of Organic/Inorganic Semiconductor Tandem Films.
C. T. Nemes, D. K. Vijapurapu, C. E. Petoukhoff, G. Z. Cheung, D. M. O’Carroll, J. Nanopart. Res. 15:1801 (2013).



Light Management in Ultra-Thin Polythiophene Films using
Plasmonic Monopole Nanoantennas.
B. Yu, S. Goodman, A. Abdelaziz, D. M. O’Carroll, Appl. Phys. Lett. 101, 151106 (2012).


Interdisciplinary Research Themes


Light Management in Ultra-Thin Polythiophene Films using Plasmonic Monopole Nanoantennas. B. Yu, S. Goodman, A. Abdelaziz, D. M. O’Carroll, Appl. Phys. Lett. 101, 151106 (2012).

Conjugated Polymer-Based Photonic Nanostructures.
D. M. O'Carroll, C. E. Petoukhoff, J. Kohl, B. Yu, C. M. Carter, S. Goodman, Poly. Chem. 4, 5181-5196 (2013).