Light Harvesting Materials
Light Harvesting Materials
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 spectroscopy. 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.
Related Papers
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.
* These authors contributed equally
L. Wang, N.P. Brawand, M. Vörös, P.D. Dahlberg, J.P. Otto, N.E. Williams, D.M. Tiede, G. Galli, and G.S. Engel, "Excitations Partition into Two Distinct Populations in Bulk Perovskites" Adv. Opt. Mat. 1700975 2018.
L. Wang, N.E. Williams, E.W. Malachosky, J.P. Otto, D. Hayes, R.E. Wood, P. Guyot-Sionnest, and G.S. Engel, "Scalable Ligand-Mediated Transport Synthesis of Organic-Inorganic Hybrid Perovskite Nanocrystals with Resolved Electronic Structure and Ultrafast Dynamics" ACS Nano 11, 2689–2696 2017.
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.