Zobrazeno 1 - 10 of 85 pro vyhledávání: '"Joshua J, Choi"'
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Akademický článek
Improved reproducibility of metal halide perovskite solar cells via automated gas quenching
Autor: Samantha C. Kaczaral, Daniel A. Morales Jr., Samuel W. Schreiber, Daniel Martinez, Ashley M. Conley, Randi Herath, Giles E. Eperon, Joshua J. Choi, Michael D. McGehee, David T. Moore
Publikováno v: APL Energy, Vol 1, Iss 3, Pp 036112-036112-8 (2023)
Achieving reproducible perovskite solar cell fabrication is crucial for making it a scalable technology. We demonstrate an automated gas quenching system to improve perovskite solar cell reproducibility at the lab-scale. We use in situ photoluminesce
Externí odkaz: https://doaj.org/article/7d53d807792a4293948fdb24f3b14f37
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4
Akademický článek
Origin of vertical orientation in two-dimensional metal halide perovskites and its effect on photovoltaic performance
Autor: Alexander Z. Chen, Michelle Shiu, Jennifer H. Ma, Matthew R. Alpert, Depei Zhang, Benjamin J. Foley, Detlef-M. Smilgies, Seung-Hun Lee, Joshua J. Choi
Publikováno v: Nature Communications, Vol 9, Iss 1, Pp 1-7 (2018)
It is desirable to align the two-dimensional perovskite layers vertical to the electrodes to maximize device performance but the formation mechanism is unclear. Here Chen et al. reveal that the film formation starts at the liquid-air interface and is
Externí odkaz: https://doaj.org/article/dc6cad8bd05b494a86c0aaad8f5a2e3e
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5
A new metric to control nucleation and grain size distribution in hybrid organic–inorganic perovskites by tuning the dielectric constant of the antisolvent
Autor: Joshua J. Choi, Paulette Clancy, Eric N. Holmgren, Blaire A. Sorenson, Lucy U. Yoon
Publikováno v: Journal of Materials Chemistry A. 9:3668-3676
In perovskite research, there is a widely exploited but poorly explained phenomenon in which the addition of “antisolvents (ATS)” to precursor solutions results in higher-quality films. We explain the mechanism and driving force underlying an ant
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8c7711058fd51d617215586816e61b1c
https://doi.org/10.1039/d0ta12364a
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6
Exciton dissociation in quantum dots connected with photochromic molecule bridges
Autor: Jonathan Bietsch, Surya B. Adhikari, Esther H. R. Tsai, Ephraiem Sarabamoun, Joshua J. Choi, Lucy U. Yoon, Guijun Wang
Publikováno v: Journal of Materials Chemistry C. 9:16006-16013
We report modulation of exciton dissociation dynamics in quantum dots (QD) connected with photochromic molecules. Our results show that switching the configuration of photochromic molecules changes the inter-QD potential barrier height which has a ma
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::baeec6ee6b4245edfb91b7fbc69655ab
https://doi.org/10.1039/d1tc04451f
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7
Ultralow Thermal Conductivity of Two-Dimensional Metal Halide Perovskites
Autor: Ashutosh Giri, Depei Zhang, Kiumars Aryana, Alexander Z. Chen, Joshua J. Choi, Xiao Hu, Alessandro Mattoni, Patrick E. Hopkins, Seunghun Lee
Publikováno v: Nano letters
20 (2020): 3331–3337. doi:10.1021/acs.nanolett.0c00214
info:cnr-pdr/source/autori:Giri, Ashutosh; Chen, Alexander Z.; Mattoni, Alessandro; Aryana, Kiumars; Zhang, Depei; Hu, Xiao; Lee, Seung-Hun; Choi, Joshua J.; Hopkins, Patrick E./titolo:Ultralow Thermal Conductivity of Two-Dimensional Metal Halide Perovskites/doi:10.1021%2Facs.nanolett.0c00214/rivista:Nano letters (Print)/anno:2020/pagina_da:3331/pagina_a:3337/intervallo_pagine:3331–3337/volume:20
We report on the thermal conductivities of two-dimensional metal halide perovskite films measured by time domain thermoreflectance. Depending on the molecular substructure of ammonium cations and owing to the weaker interactions in the layered struct
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71a0389c4513c029a348e694ad095d17
https://doi.org/10.1021/acs.nanolett.0c00214
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8
Relationship between the Nature of Monovalent Cations and Charge Recombination in Metal Halide Perovskites
Autor: Katelyn A. Dagnall, Alexander Z. Chen, Kai Xiao, Mool C. Gupta, Xiaoyu Deng, Seunghun Lee, Matthew R. Alpert, Shelby Cuthriell, Zeming Sun, Benjamin Foley, Ying-Zhong Ma, Joshua J. Choi
Publikováno v: ACS Applied Energy Materials. 3:1298-1304
We report charge recombination rates in lead iodide perovskites with alloys of formamidinium (FA) and methylammonium (MA) cations, FAxMA1–xPbI3, 0 ≤ x ≤ 0.9, prepared through ion exchange with mini...
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9dcf8cf10953cb7177ffb8309bc103c3
https://doi.org/10.1021/acsaem.9b02310
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9
Ytterbium-Doped Cesium Lead Chloride Perovskite as an X-ray Scintillator with High Light Yield
Autor: Katelyn A. Dagnall, Ashley M. Conley, Lucy U. Yoon, Haritha S. Rajeev, Seung-Hun Lee, Joshua J. Choi
Publikováno v: ACS omega. 7(24)
Ytterbium-doped cesium lead halides are quantum cutting materials with exceptionally high photoluminescence quantum yields, making them promising materials as scintillators. In this work, we report ytterbium-doped cesium lead chloride (Yb
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f633eef5a4e14116711489afc20d474
https://pubmed.ncbi.nlm.nih.gov/35755380
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10
Organic molecular dynamics and charge-carrier lifetime in lead iodide perovskite MAPbI 3
Autor: Akihiro Koda, Hirotaka Okabe, Masatoshi Hiraishi, Ryosuke Kadono, Katelyn A. Dagnall, Joshua J. Choi, Seung-Hun Lee
Publikováno v: Proceedings of the National Academy of Sciences. 119
The long charge carrier lifetime of the hybrid organic-inorganic perovskites (HOIPs) is the key for their remarkable performance as a solar cell material. The microscopic mechanism for the long lifetime is still in debate. Here, by using muon spin re
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d57f95d9a853e0f939efcd2a47e70d89
https://doi.org/10.1073/pnas.2115812119
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