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Ajay Ram Srimath Kandada
Researcher at Wake Forest University
Publications - 80
Citations - 7973
Ajay Ram Srimath Kandada is an academic researcher from Wake Forest University. The author has contributed to research in topics: Perovskite (structure) & Exciton. The author has an hindex of 31, co-authored 71 publications receiving 6644 citations. Previous affiliations of Ajay Ram Srimath Kandada include Istituto Italiano di Tecnologia & Georgia Institute of Technology.
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Journal ArticleDOI
Excitons versus free charges in organo-lead tri-halide perovskites
Valerio D’Innocenzo,Valerio D’Innocenzo,Giulia Grancini,Marcelo J. P. Alcocer,Marcelo J. P. Alcocer,Ajay Ram Srimath Kandada,Samuel D. Stranks,Michael M. Lee,Guglielmo Lanzani,Guglielmo Lanzani,Henry J. Snaith,Annamaria Petrozza +11 more
TL;DR: Optical spectroscopy is used to estimate the exciton binding energy in the mixed-halide crystal to be in the range of 50 meV, and it is shown that such a value is consistent with almost full ionization of the excitonic population under photovoltaic cell operating conditions.
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Highly efficient planar perovskite solar cells through band alignment engineering
Juan Pablo Correa Baena,Ludmilla Steier,Wolfgang Tress,Michael Saliba,Stefanie Neutzner,Stefanie Neutzner,Taisuke Matsui,Fabrizio Giordano,T. Jesper Jacobsson,Ajay Ram Srimath Kandada,Shaik M. Zakeeruddin,Annamaria Petrozza,Antonio Abate,Mohammad Khaja Nazeeruddin,Michael Grätzel,Anders Hagfeldt +15 more
TL;DR: In this article, the authors show that planar perovskite solar cells using TiO2 are inherently limited due to conduction band misalignment and demonstrate, with a variety of characterization techniques, for the first time that SnO2 achieves a barrier-free energetic configuration, obtaining almost hysteresis-free power conversion efficiencies (PCEs).
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Solution Synthesis Approach to Colloidal Cesium Lead Halide Perovskite Nanoplatelets with Monolayer-Level Thickness Control
Quinten A. Akkerman,Quinten A. Akkerman,Silvia G. Motti,Silvia G. Motti,Ajay Ram Srimath Kandada,Edoardo Mosconi,Valerio D’Innocenzo,Valerio D’Innocenzo,Giovanni Bertoni,Sergio Marras,Brett A. Kamino,Laura Miranda,Filippo De Angelis,Annamaria Petrozza,Mirko Prato,Liberato Manna +15 more
TL;DR: The blue fluorescent CsPbCl3 NPLs represent a new member of the scarcely populated group of blue-emitting colloidal nanocrystals and the exciton dynamics were found to be independent of the extent of 2D confinement in these platelets, and this was supported by band structure calculations.
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Tuning the Light Emission Properties by Band Gap Engineering in Hybrid Lead Halide Perovskite
Valerio D’Innocenzo,Valerio D’Innocenzo,Ajay Ram Srimath Kandada,Michele De Bastiani,Michele De Bastiani,Marina Gandini,Annamaria Petrozza +6 more
TL;DR: It is demonstrated that larger crystallites present smaller band gap and longer lifetime, which correlates to a smaller radiative bimolecular recombination coefficient, and also shows that they present a higher optical gain, becoming preferred candidates for the realization of CW lasing devices.
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Defect-Assisted Photoinduced Halide Segregation in Mixed-Halide Perovskite Thin Films
Alex J. Barker,Aditya Sadhanala,Felix Deschler,Marina Gandini,Satyaprasad P. Senanayak,Phoebe Pearce,Edoardo Mosconi,Andrew J. Pearson,Yue Wu,Ajay Ram Srimath Kandada,Tomas Leijtens,Filippo De Angelis,Siân E. Dutton,Annamaria Petrozza,Richard H. Friend +14 more
TL;DR: In this paper, it was shown that ion segregation takes place via halide defects, resulting in iodide-rich lowbandgap regions close to the illuminated surface of the film, driven by the strong gradient in carrier generation rate through the thickness of these strongly absorbing materials.