K
Kyle W. Kemp
Researcher at University of Toronto
Publications - 19
Citations - 4392
Kyle W. Kemp is an academic researcher from University of Toronto. The author has contributed to research in topics: Quantum dot & Photovoltaics. The author has an hindex of 16, co-authored 19 publications receiving 3994 citations. Previous affiliations of Kyle W. Kemp include Stanford University.
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Journal ArticleDOI
Colloidal-quantum-dot photovoltaics using atomic-ligand passivation
Jiang Tang,Kyle W. Kemp,Sjoerd Hoogland,Kwangseob Jeong,Huan Liu,Huan Liu,Larissa Levina,Melissa Furukawa,Xihua Wang,Ratan Debnath,Dongkyu Cha,Kang Wei Chou,Armin Fischer,Aram Amassian,John B. Asbury,Edward H. Sargent +15 more
TL;DR: An atomic ligand strategy is established that makes use of monovalent halide anions to enhance electronic transport and successfully passivate surface defects in PbS CQD films that shows up to 6% solar AM1.5G power-conversion efficiency.
Journal ArticleDOI
Hybrid passivated colloidal quantum dot solids
Alexander H. Ip,Susanna M. Thon,Sjoerd Hoogland,Oleksandr Voznyy,David Zhitomirsky,Ratan Debnath,Larissa Levina,Lisa R. Rollny,Graham H. Carey,Armin Fischer,Kyle W. Kemp,Illan J. Kramer,Zhijun Ning,André J. Labelle,Kang Wei Chou,Aram Amassian,Edward H. Sargent +16 more
TL;DR: The density of midgap trap states in CQD solids is quantified and shown to be limited by electron-hole recombination due to these states, and a robust hybrid passivation scheme is developed that can passivate trap sites that are inaccessible to much larger organic ligands.
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Air-stable n-type colloidal quantum dot solids
Zhijun Ning,Oleksandr Voznyy,Jun Pan,Sjoerd Hoogland,Valerio Adinolfi,Jixian Xu,Min Li,Ahmad R. Kirmani,Jon-Paul Sun,James C. Minor,Kyle W. Kemp,Haopeng Dong,Lisa R. Rollny,André J. Labelle,Graham H. Carey,Brandon R. Sutherland,Ian G. Hill,Aram Amassian,Huan Liu,Jiang Tang,Osman M. Bakr,Edward H. Sargent +21 more
TL;DR: Using density functional theory, inorganic passivants that bind strongly to the CQD surface and repel oxidative attack are identified that are used to build an air-stable n-type inverted quantum junction device and a solar power conversion efficiency as high as 8%.
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Enhanced Mobility-Lifetime Products in PbS Colloidal Quantum Dot Photovoltaics
Kwang Seob Jeong,Jiang Tang,Huan Liu,Huan Liu,Jihye Kim,Andrew W. Schaefer,Kyle W. Kemp,Larissa Levina,Xihua Wang,Sjoerd Hoogland,Ratan Debnath,Lukasz Brzozowski,Edward H. Sargent,John B. Asbury +13 more
TL;DR: In this paper, a combination of electrical and optical characterization techniques, ligand passivation strategies aimed at tuning the density and energetic distribution of charge trap states at PbS nanocrystal surfaces were investigated.
Journal ArticleDOI
Engineering colloidal quantum dot solids within and beyond the mobility-invariant regime.
David Zhitomirsky,Oleksandr Voznyy,Larissa Levina,Sjoerd Hoogland,Kyle W. Kemp,Alexander H. Ip,Susanna M. Thon,Edward H. Sargent +7 more
TL;DR: It is shown that it is not mobility, but instead the average spacing among recombination centres that governs the diffusion length of charges in today's quantum dot solids, and a device model is developed that accurately predicts the thickness dependence and diffusion length dependence of devices.