500 5th St NW - KWS 502
Washington, DC 20001
Tel: (202) 334-2800
Fax: (202) 334-2139
Phase 4 (2009 Deadline)
Carbazole and Fluorene-Based Polymeric and Molecular Materials for Optoelectronic
Applications: Synthesis, Spectroscopic Studies, Device Fabrication, and Characterization
Kevin D. Belfield, University of Central Florida
Aamer Saeed, Quaid-i-Azam University
Pakistani Funding (HEC): $100,343
US Funding (Department of State): $123,030
Project Dates: November 15, 2010 - November 14, 2013 (Extended through November 14, 2014)
This project involves a collaborative effort to synthesize and characterize a series of novel organic semiconducting materials for electronic device applications. Using the new materials, organic light-emitting diodes and organophotovoltaic devices will be fabricated and characterized using new equipment to be installed at the Pakistani partner university with funds from this grant. This equipment will form the basis for a new organic semiconducting materials research lab at the Department of Chemistry of Quaid-i-Azam University (QAU), the first lab of its kind in Pakistan. Pakistani graduate students participating in the project will receive fabrication and characterization training at the University of Central Florida, a valuable opportunity not only to gain new research skills but also to establish academic and professional ties with American students and professors.
One postdoctoral research associate, two PhD graduate students, and one MS graduate student in Dr. Belfield’s lab continued to synthesize several squaraine, fluorenyl, and BODIPY derivatives, including a block copolymer scaffold to use in covalently attaching chromophores.
Three PhD graduate students in Dr. Aamer Saeed’s lab at Quaid-i-Azam University continued preparing several key starting materials for the synthesis of polymers for subsequent optoelectronic characterization. This includes Ms. Madiha Irfan who is continuing her doctoral studies at Quaid-i-Azam University after spending time last year in Dr. Belfield’s laboratory. Meanwhile, Dr. Saeed established an organic materials lab at Quaid-i-Azam University and continues to develop human resources and infrastructure capacity.
Exchanges took place during this last reporting period. Dr. Saeed and Mr. Jamaluddin Mahar of Quaid-i-Azam University arrived at UCF in September. Dr. Saeed stayed for one month in which fruitful discussions of research, student progress, and joint publications took place. Mr. Jamaluddin will stay in residence at UCF for four months, conducting joint research and receiving training in advanced luminescence characterization.
Finally, two publications resulting from this project were completed during the last quarter. First, the results of ultrafast spectroscopic characterization were published in the Journal of Physical Chemistry. Moreover, the team prepared a series of fluorenyl lanthanide complexes and determined the structural and photophysical properties. These results now appear online as an ASAP publication in Dalton Transactions. Lastly, a novel Fe (III) sensing probe was prepared and submitted for publication
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2011 Show summary || Hide summary || Download full report
During 2011, one postdoctoral research associate and two PhD students in Dr. Belfield’s lab prepared a series of squaraine derivatives and continued to perform comprehensive molecular, crystallographic, and optical characterization. They also conducted advanced two-photon absorption and stimulated emission depletion photophysical experiments and developed a method for determining stimulated emission depletion spectra under both one- and two-photon depletion conditions. The paper describing their results from these experiments was published in the journal Supramolecular Chemistry. Meanwhile, three PhD students in Dr. Saeed’s lab continue to prepare several key starting materials needed to synthesize polymers for optoelectronic characterization.
The team is planning to send one PhD student (Ms. Madiha Irfan) from Dr. Saeed's lab to Dr. Belfield's lab at UCF in 2012. She is expected to spend four months conducting collaborative research and receiving training in photoluminescent and other photophysical characterization techniques. The student is currently in the process of applying for a J-1 visa. Both labs will continue the synthesis and characterization of optoelectronic materials for the next 3-6 months.
2012 Show summary || Hide summary || Download full report
The postdoctoral research associate and two PhD students in Dr. Belfield's lab at UCF continued their work preparing a series of squaraine derivatives, compounds that are useful both as dyes and as components in materials used in optoelectronic devices and solar cells. They also performed comprehensive molecular, crystallographic, and optical characterization of the materials they synthesized and conducted advanced two-photon absorption and stimulated emission depletion experiments. A paper describing the synthesis and properties of several squaraine derivatives was published in the journal Supramolecular Chemistry in 2011 and another paper is in press with the same journal in 2012. At QAU, three PhD students in Dr. Saeed's lab continue to prepare several key starting materials that will be used to synthesize polymers for subsequent optoelectronic characterization. One of Dr. Saeed's PhD students, Ms. Madiha Irfan, arrived in Orlando in March 2012 for a four-month visit to Dr. Belfield's lab. He reports that Ms. Irfan has gotten off to a good start on her training in photoluminescent and other photophysical characterization techniques. Her work with Dr. Belfield and his students is not only contributing to this joint project but also forming part of her PhD dissertation research.
The postdoctoral research associate, two PhD students, and an undergraduate continued to synthesize compounds in a series of fluorene and squaraine derivatives and perform comprehensive molecular, crystallographic, and optical characterizations in Dr. Belfield’s lab at UCF. Over the past quarter, the team conducted several experiments and developed new characterization methodology for ultrafast dynamics photophysics. These results have been published in several journals, including ACS Applied Materials and Interfaces, Journal of Physical Chemistry (two papers), Supramolecular Chemistry, and ChemPhysChem. On the Pakistani side, three PhD students in Dr. Saeed’s lab continued to prepare several key starting materials for the synthesis of polymers for subsequent optoelectronic characterization. One Pakistani PhD student (Ms. Madiha Irfan) finished her four-month training in Dr. Belfield’s lab at UCF in July 2012. She worked well with Dr. Belfield’s group and conducted experiments in the synthesis and characterization of optoelectronic organic materials that will be included in her PhD dissertation. In the next few months, both sides will continue the synthesis and characterization of optoelectronic materials in their respective labs.
2013 Show summary || Hide summary || Download full report
One postdoctoral research associate and two PhD students in Dr. Belfield’s lab at UCF synthesized several compounds in a series of squaraine derivatives that are useful both as dyes and as components in materials used in optoelectronic devices and solar cells. One candidate molecule in this series proved useful in an organic solar cell test devise for solar energy power conversion and a paper summarizing these results was published in Progress in Photovoltaics: Research and Applications. Also, several fluorine-based compounds were prepared and evaluated for their optelectronic properties with one compound exhibiting highly sensitive and selective fluoride-ion sensing capability. A paper based on this work was accepted for publication and is currently in press by ACS Applied Materials and Interfaces. Lastly, their work resulted in a new, squaraine-based photoacid generators with potential uses in photodynamic cancer therapy published in the Journal of the American Chemical Society.
At QAU, three PhD students in Dr. Saeed's lab continue to prepare several key starting materials that will be used to synthesize polymers for subsequent optoelectronic characterization. One of Dr. Saeed’s PhD students, Ms. Madiha Irfan, returned to Pakistan after completing her 6-month work at Dr. Belfield’s lab. Her work with Dr. Belfield and his students contributed not only to this joint project but also formed part of her PhD dissertation research. Pakistani PI, Dr. Aamer Saeed is scheduled to visit Dr. Belfields’s laboratory this year for 6 weeks to discuss progress made in Pakistan, see results of the UCF research as well as the joint research conducted by Ms. Irfan and to review her progress towards the PhD degree. Dr. Saeed succeeded in establishing an organic materials laboratory at QAU.