Offfice: 365 Benson

Phone: 206-543-5525

Fax: 206-685-3451

E-mail: jenekhe@uw.edu

 

 

 

 

 

 

 

 

 

 

One of Professor Jenekhe's main research interests focuses on electronic, optoelectronic, and photonic phenomena in polymers. Fundamental understanding of these phenomena and the related electroactive and photoactive properties in synthetic polymers is essential to their applications in diverse areas of technology ranging from imaging, photodetectors, batteries, sensors, electrochromic devices, and solar cells to light emitting diodes for flat panel displays. One perennial problem is elucidation of the structural origins of electronic and photonic properties of polymers; another is how to improve or control the efficiencies of the photophysical and charge transport processes. Our general approaches to these problems include the design and synthesis of new polymers, physical and photophysical measurements, structure-property correlations, computational modeling, thin film processing, and polymer device engineering. 

 

In one area, we are exploring how the electronic, molecular, and supramolecular structures and morpholoty of conjugated polymers influence their photoconductivity, luminescence, and charge transport properties. Model systems include homologous series of conjugated oligomers, blends of conjugated polymers, and derivatized conjugated polymers. Aggregation of conjugated polymers which can lead to diverse phenomena is under study, including the formation of excited-state and ground-state complexes which can significantly modulate the optical and photoelectronic properties of the materials. Our studies in the area of polymer thin film device engineering are aimed at addressing the fundamental and engineering issues involved in developing and producing high performance and durable electronic and optoelectronic devices (e.g. light-emitting diodes, photodetectors, thin film transistors, photovoltaic cells, sensors, etc.) from organic and polymeric materials. These issues include polymer thin film deposition processes, characterization of the electronic, optical and mechanical properties of polymer thin films and polymer/polymer, and polymer/metal interfaces, and the fabrication and evaluation of multilayer polymer thin film devices. Recently discovered finite size effects on nanoscale semiconducting polymer thin films and devices also require further study.

 

2013 Publications

1. Li, H.; Kim, F. S.; Ren, G.; Jenekhe, S. A. “High Mobility n-Type Conjugated Polymers for Organic Electronics,” J. Am. Chem. Soc. 2013, 135, 14920-14923. DOI:10.1021/ja407471b.

2. Earmme, T.; Hwang, Y. J.; Murari, N. M.; Subramaniyan, S.; Jenekhe, S. A. “All-Polymer Solar Cells with 3.3% Efficiency Based on Naphthalene Diimide-Selenophene Copolymer Acceptor,” J. Am. Chem. Soc. 2013, 135, 14960-14963. DOI: 10.1021/ja4085429.

3. Richards, J. J.; Rice, A. H.; Nelson, R. M.; Kim, F. S.; Jenekhe, S. A.; Luscombe, C. K.; Pozzo, D. C. “Modification of PCBM crystallization via incorporation of C60 in polymer/fullerene solar cells,”   Adv. Funct. Mater.  2013, 23, 514-522.

4. Colbert, A.; Janke, E.; Hsieh, S.;  Subramaniyan, S.; Schlenker,C. W.; Jenekhe, S. A.; Ginger, D. S. “Hole Transfer from Low Bandgap Quantum Dots to Conjugated Polymers in Organic/Inorganic Hybrid Photovoltaics,” J. Phys. Chem. Lett. 2013, 4, 280-284.

5. Ren, G.;  Schlenker,C. W.; Ahmed, E.;  Subramaniyan, S.; Olthof, S.; Kahn, A.;  Ginger, D. S.; Jenekhe, S. A. “Photoinduced Hole Transfer Becomes Suppressed with Diminished Driving Force in Polymer-Fullerene Solar Cells While Electron Transfer Remains Active,” Adv. Funct. Mater. 2013, 23, 1238-1249.

6. Strein, E.; Colbert, A.; Nagaoka, H.;  Subramaniyan, S.; Schlenker,C. W.; Janke, E.; Jenekhe, S. A.; Ginger, D. S. “Charge Generation and Energy Transfer in Hybrid Polymer/Infrared Quantum Dot Solar Cells,” Energy Environ. Sci. 2013, 6, 769-775.

7.Hahm, S. G.; Rho, Y.; Jung, J.; Kim, S. H.; Sajoto, T.; Kim, F. S.; Barlow, S.; Park, C. E.; Jenekhe, S. A.; Marder, S. R.; Ree, M.  “High-Performance n-Channel Thin-Film Field-Effect Transistors Based on a Nanowire-Forming Polymer,” Adv. Funct. Mater. 2013, 23, 2060-2071.

8. Tucker, N. M.; Briseno, A. L.; Acton, O.; Yip, H. L.; Ma, H.; Jenekhe, S. A.; Xia, Y.;  Jen, A. K. Y. “Solvent-Dispersed Benzothiadiazole-Tetrathiafulvalene Single-Crystal Nanowires and Their Application in Field-Effect Transistors,” ACS Appl. Mater.  Interfaces 2013, 5, 2320-2324.

9. Li, H.; Kim, F. S.; Ren, G.; Hollenbeck, E. C.; Subramaniyan, S.; Jenekhe, S. A. “Tetraazabenzodifluoranthene Diimides: New Building Blocks for Solution Processable N-Type Organic Semiconductors,” Angew. Chem. Int. Ed. 2013, 52, 5513-5517.

10. Hwang, Y. J.; Murari, N. M.; Jenekhe, S. A. “New n-Type Polymer Semiconductors Based on Naphthalene Diimide and Selenophene Derivatives for Organic Field-Effect Transistors,” Polym. Chem. 2013, 4, 3187-3195.

11.  Earmme, T.; Jenekhe, S. A. “Improved electron injection and transport by use of baking soda as a low-cost, air-stable, n-dopant for solution-processed phosphorescent organic light-emitting diodes,” Appl. Phys. Lett. 2013, 102, 233305/1-4.

12. Shoaee, S.; Subramaniyan, S.; Xin, H.; Keiderling, C.; Tuladhar, P. S.; Jamieson, F.;  Jenekhe, S. A.; Durrant, J. R. “Charge photogeneration for a series of thiazolo-thiazole donor polymers blended with the fullerene electron acceptors PCBM and ICBA,” Adv. Funct. Mater.  2013, 23, 3286-3298.