202 citations · 750 across the 15 of their papers we have counts for
17 papers
Coherent Exciton-Lattice Dynamics in a 2D Metal Organochalcogenolate Semiconductor
Eric R. Powers, Watcharaphol Paritmongkol, Dillon C. Yost +3
Hybrid organic-inorganic nanomaterials can exhibit transitional behavior that deviates from models developed for all-organic or all-inorganic materials systems. Here, we reveal the…
Efficient Thermal Transport across Molecular Chains in Hybrid 2D Lead Bromide Perovskites
Nabeel S. Dahod, Watcharaphol Paritmongkol, William A. Tisdale
We report measurements of the heat capacity and cross-plane thermal conductivity of 2D (CxH2x+1NH3)2[MAPbBr3]n-1PbBr4 (MA = methylammonium) lead bromide perovskites (2D LHPs) at ro…
Persistent Enhancement of Exciton Diffusivity in CsPbBr3 Nanocrystal Solids
Wenbi Shcherbakov-Wu, Seryio Saris, Thomas Sheehan +6
In semiconductors, exciton or charge carrier diffusivity is typically described as an inherent material property. Here, we show that the transport of excitons (i.e., bound electron…
Super-resolved Second Harmonic Generation Imaging by Coherent Image Scanning Microscopy
Dekel Raanan, Man Suk Song, William A Tisdale +1
We extend image scanning microscopy to second harmonic generation (SHG) by extracting the complex field amplitude of the second-harmonic beam. While the theory behind coherent imag…
Revealing the Brønsted-Evans-Polanyi Relation in Halide-Activated Fast MoS2 Growth Towards Millimeter-Sized 2D Crystals
Qingqing Ji, Cong Su, Nannan Mao +7
Achieving large-size two-dimensional (2D) crystals is key to fully exploiting their remarkable functionalities and application potentials. Chemical vapor deposition (CVD) growth of…
Suppressing Diffusion-Mediated Exciton Annihilation in 2D Semiconductors Using the Dielectric Environment
Aaron J. Goodman, Der-Hsien Lien, Geun Ho Ahn +5
Atomically thin semiconductors such as monolayer MoS2 and WS2 exhibit nonlinear exciton-exciton annihilation at notably low excitation densities (below ~10 excitons/um2 in MoS2). H…
Nonequilibrium dynamics of localized and delocalized excitons in colloidal quantum dot solids
Elizabeth M. Y. Lee, William A. Tisdale, Adam P. Willard
Self-assembled quantum dot (QD) solids are a highly tunable class of materials with a wide range of applications in solid-state electronics and optoelectronic devices. In this pers…
Ideal Bandgap in a 2D Ruddlesden-Popper Perovskite Chalcogenide for Single-junction Solar Cells
Shanyuan Niu, Debarghya Sarkar, Kristopher Williams +12
Transition metal perovskite chalcogenides (TMPCs) are explored as stable, environmentally friendly semiconductors for solar energy conversion. They can be viewed as the inorganic a…
High Repetition-Rate Femtosecond Stimulated Raman Spectroscopy with Fast Acquisition
Matthew N. Ashner, William A. Tisdale
Time-resolved femtosecond stimulated Raman spectroscopy (FSRS) is a powerful tool for investigating ultrafast structural and vibrational dynamics in light absorbing systems. Howeve…
Ultrafast Charge Transfer at a Quantum Dot/2D Materials Interface Probed by Second Harmonic Generation
Aaron J. Goodman, Nabeel S. Dahod, William A. Tisdale
Hybrid quantum dot (QD) / transition metal dichalcogenide (TMD) heterostructures are attractive components of next generation optoelectronic devices, which take advantage of the sp…
Phase-Modulated Degenerate Parametric Amplification Microscopy
Yunan Gao, Aaron J. Goodman, Pin-Chun Shen +2
Second-order nonlinear optical interactions, including second harmonic generation (SHG) and sum-frequency generation (SFG), can reveal a wealth of information about chemical, elect…
Exciton Trapping Is Responsible for the Long Apparent Lifetime in Acid-Treated MoS2
Aaron J. Goodman, Adam P. Willard, William A. Tisdale
Here, we show that deep trapped "dark" exciton states are responsible for the surprisingly long lifetime of band-edge photoluminescence in acid-treated single-layer MoS2. Temperatu…
Including surface ligand effects in continuum elastic models of nanocrystal vibrations
Elizabeth M. Y. Lee, A. Jolene Mork, Adam P. Willard +1
The measured low frequency vibrational energies of some quantum dots (QDs) deviate from the predictions of traditional elastic continuum models. Recent experiments have revealed th…
Enhancement of second-order nonlinear-optical signals by optical stimulation
Aaron J. Goodman, William A. Tisdale
Second-order nonlinear optical interactions such as sum- and difference-frequency generation are widely used for bioimaging and as selective probes of interfacial environments. How…
Can disorder enhance incoherent exciton diffusion?
Elizabeth M. Y. Lee, William A. Tisdale, Adam P. Willard
Recent experiments aimed at probing the dynamics of excitons have revealed that semiconducting films composed of disordered molecular subunits, unlike expectations for their perfec…
Reduced dielectric screening and enhanced energy transfer in single and few-layer MoS2
Ferry Prins, Aaron J. Goodman, William A. Tisdale
We report highly efficient non-radiative energy transfer from cadmium selenide (CdSe) quantum dots to monolayer and few-layer molybdenum disulfide (MoS2). The quenching of the dono…
Highly efficient, dual state emission from an organic semiconductor
Sebastian Reineke, Nico Seidler, Shane R. Yost +3
We report highly efficient, simultaneous fluorescence and phosphorescence (74% yield) at room temperature from a single molecule ensemble of (BzP)PB dispersed into a polymer host.…