Soft Semiconducting Materials and Devices Lab
About the Lab
Research Interests, Facilities and Technology
Our lab conducts basic studies of material properties, device physics and engineering. Materials of interest include organic semiconductors (polymers and small molecules), semiconductor quantum dots. One focus is to fabricate and characterize nanostructure optoelectronic devices ( solar cells, light emitting diodes and thin film transistors).
Research facilities consist of optical spectroscopic setup, ns range transient transport measurement apparatus, Mbraun integrated glovebox system, organic deposition system and organic solar cell and LED fabrication facilities, Low temperature apparatus and high vacuum deposition system.
Related nanotechnology includes metrological tools such as AFM, SEM and TEM; thin film coating technology, photolithography and e-beam lithography and MEMS techniques.
Semitransparent Organic Solar Array
Non-luminescent highly crystalline polymer with NDGS
Poly(thienylene-vinylene) [PTV] belongs to the rare class of non-luminescent non-degenerate ground state pi-conjugated polymers. We show that the ordered PTV films contain abundant nanocrystalline domains that substantially influence the optical spectra as a result of aggregates formation. We demonstrate that the primary intrachain exciton (1Bu) decays within ~500 fs to the more stable ‘dark’ exciton (2Ag), and the released energy results in both static and propagating strain wave that bounces back and forth in the polymer film.
Organic Micro Array
Miniature organic solar array for on-chip device application
Flexible Semitransparent Solar Array
Organic solar array for building integrated photovotaic applications.