Dynamic lattice distortions driven by surface trapping in semiconductor nanocrystals

Autor: Burak Guzelturk, Benjamin L. Cotts, Dipti Jasrasaria, John P. Philbin, David A. Hanifi, Brent A. Koscher, Arunima D. Balan, Ethan Curling, Marc Zajac, Suji Park, Nuri Yazdani, Clara Nyby, Vladislav Kamysbayev, Stefan Fischer, Zach Nett, Xiaozhe Shen, Michael E. Kozina, Ming-Fu Lin, Alexander H. Reid, Stephen P. Weathersby, Richard D. Schaller, Vanessa Wood, Xijie Wang, Jennifer A. Dionne, Dmitri V. Talapin, A. Paul Alivisatos, Alberto Salleo, Eran Rabani, Aaron M. Lindenberg

Publikováno v: Nature Communications, Vol 12, Iss 1, Pp 1-9 (2021)

Charge trapping can lead to severe nonradiative losses in colloidal semiconductor nanocrystals (NCs). The authors report femtosecond electron diffraction measurements on photoexcited NCs to reveal atomic-scale insights into how localization of charge

Externí odkaz: https://doaj.org/article/cde4023909da4210bdf52ef5225abe17

Bulk and Nanocrystalline Cesium Lead-Halide Perovskites as Seen by Halide Magnetic Resonance

Autor: Laura Piveteau, Marcel Aebli, Nuri Yazdani, Marthe Millen, Lukas Korosec, Franziska Krieg, Bogdan M. Benin, Viktoriia Morad, Christophe Piveteau, Toni Shiroka, Aleix Comas-Vives, Christophe Copéret, Aaron M. Lindenberg, Vanessa Wood, René Verel, Maksym V. Kovalenko

Publikováno v: ACS Central Science, Vol 6, Iss 7, Pp 1138-1149 (2020)

Externí odkaz: https://doaj.org/article/2c7179e65c154d929c1215488d908022

Phonon-engineered solids constructed from nanocrystals

Autor: Maximilian Jansen, Nuri Yazdani, Vanessa Wood

Publikováno v: APL Materials, Vol 7, Iss 8, Pp 081124-081124-7 (2019)

Here, we present the concept of colloidal nanocrystal-based solids as solution-processed, phonon-engineered materials. In particular, we discuss superlattice phonons, the vibrational modes associated with the motion of the nanocrystals away from thei

Externí odkaz: https://doaj.org/article/61e5511c59c24997b7ef83a2cdb7777d

Modeling and optimization of atomic layer deposition processes on vertically aligned carbon nanotubes

Autor: Nuri Yazdani, Vipin Chawla, Eve Edwards, Vanessa Wood, Hyung Gyu Park, Ivo Utke

Publikováno v: Beilstein Journal of Nanotechnology, Vol 5, Iss 1, Pp 234-244 (2014)

Many energy conversion and storage devices exploit structured ceramics with large interfacial surface areas. Vertically aligned carbon nanotube (VACNT) arrays have emerged as possible scaffolds to support large surface area ceramic layers. However, o

Externí odkaz: https://doaj.org/article/a1eb405b82b442639f79c912874b8f91

Phonon-Mediated and Weakly Size-Dependent Electron and Hole Cooling in CsPbBr3 Nanocrystals Revealed by Atomistic Simulations and Ultrafast Spectroscopy

Autor: Kai Chen, Ivan Infante, Pieter Geiregat, Jorick Maes, Felipe Zapata, Justin M. Hodgkiss, Vanessa Wood, Simon C. Boehme, Nuri Yazdani, Stephanie ten Brinck, Zeger Hens

Publikováno v: Nano Letters, 20(3), 1819-1829. American Chemical Society
Boehme, S C, Brinck, S T, Maes, J, Yazdani, N, Zapata, F, Chen, K, Wood, V, Hodgkiss, J M, Hens, Z, Geiregat, P & Infante, I 2020, ' Phonon-Mediated and Weakly Size-Dependent Electron and Hole Cooling in CsPbBr 3 Nanocrystals Revealed by Atomistic Simulations and Ultrafast Spectroscopy ', Nano Letters, vol. 20, no. 3, pp. 1819-1829 . https://doi.org/10.1021/acs.nanolett.9b05051

We combine state-of-the-art ultrafast photoluminescence and absorption spectroscopy and nonadiabatic molecular dynamics simulations to investigate charge-carrier cooling in CsPbBr3 nanocrystals over a very broad size regime, from 0.8 to 12 nm. Contra

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dcb309d6c37bf3becc2a7ec9564d657f
https://doi.org/10.1021/acs.nanolett.9b05051