Materials such as hybrid organic-inorganic perovskites, self-assembled molecular crystals, and conjugated polymers can demonstrate anomalously long excitonic diffusion. We seek to characterize and optimize these materials through an iterative combination of synthesis and spectrosocpy. In the laboratory, we probe the initial femtosecond dynamics after excitation and follow the fate of the carriers and excitons through the nanosecond (or hundreds of nanosecond) timescale.
E.M. Janke*, N.E. Williams*, C. She, D. Zherebetskyy, M. Hudson, L. Wang, D.J. Gosztola, R.D. Schaller, B. Lee, C. Sun, G.S. Engel, D.V. Talapin, "The origin of broad emission spectra in InP quantum dots: contributions from structural and electronic disorder" JACS 140, 15791–15803 2018.
C. She, I. Fedin, D.S. Dolzhnikov, P.D. Dahlberg, G.S. Engel, R.D. Schaller, D.V. Talapin, "Red, Yellow, Green, and Blue Amplified Spontaneous Emission and Lasing Using Colloidal CdSe Nanoplatelets" ACS Nano. 9, 9475–9485 2015.
Y. Zhang, S. Oh, F.H. Alharbi, G.S. Engel, and S. Kais, "Delocalized quantum states enhance photocell efficiency", Phys. Chem. Chem. Phys. 17, 5743-5750 2015.