O
Octavi E. Semonin
Researcher at Columbia University
Publications - 30
Citations - 4729
Octavi E. Semonin is an academic researcher from Columbia University. The author has contributed to research in topics: Quantum dot & Multiple exciton generation. The author has an hindex of 16, co-authored 30 publications receiving 4240 citations. Previous affiliations of Octavi E. Semonin include Harvey Mudd College & University of Colorado Boulder.
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Journal ArticleDOI
Peak external photocurrent quantum efficiency exceeding 100% via MEG in a quantum dot solar cell.
Octavi E. Semonin,Octavi E. Semonin,Joseph M. Luther,Sukgeun Choi,Hsiang-Yu Chen,Jianbo Gao,Jianbo Gao,Arthur J. Nozik,Arthur J. Nozik,Matthew C. Beard +9 more
TL;DR: It is demonstrated that MEG charge carriers can be collected in suitably designed QD solar cells, providing ample incentive to better understand MEG within isolated and coupled QDs as a research path to enhancing the efficiency of solar light harvesting technologies.
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Stability Assessment on a 3% Bilayer PbS/ZnO Quantum Dot Heterojunction Solar Cell
Joseph M. Luther,Jianbo Gao,Jianbo Gao,Matthew T. Lloyd,Octavi E. Semonin,Octavi E. Semonin,Matthew C. Beard,Arthur J. Nozik,Arthur J. Nozik +8 more
TL;DR: This work provides the first NREL-certified efficiency measurement on an all-inorganic, solution-processed, nanocrystal solar cell, composed of ZnO nanocrystals and 1.3 eV PbS quantum dots with gold as the top contact.
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Third generation photovoltaics based on multiple exciton generation in quantum confined semiconductors.
Matthew C. Beard,Joseph M. Luther,Octavi E. Semonin,Octavi E. Semonin,Arthur J. Nozik,Arthur J. Nozik +5 more
TL;DR: One of the tenets of the SQ limit, that photons only produce one electron-hole pair at the electrodes of a solar cell, can be overcome is shown, showing an external quantum efficiency for photocurrent of greater than 100% and an internal quantum efficiency reached 130%.
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Quantum Dot Size Dependent J-V Characteristics in Heterojunction ZnO/PbS Quantum Dot Solar Cells
Jianbo Gao,Joseph M. Luther,Octavi E. Semonin,Octavi E. Semonin,Randy J. Ellingson,Arthur J. Nozik,Arthur J. Nozik,Matthew C. Beard +7 more
TL;DR: The current-voltage characteristics of ZnO/PbS quantum dot (QD) solar cells show a QD size-dependent behavior resulting from a Schottky junction that forms at the back metal electrode opposing the desirable diode formed between theZnO and PbS QD layers.
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Infrared Spectroscopic Study of Vibrational Modes in Methylammonium Lead Halide Perovskites
Tobias Glaser,Christian Müller,Michael Sendner,Christian Krekeler,Octavi E. Semonin,Trevor D. Hull,Omer Yaffe,Jonathan S. Owen,Wolfgang Kowalsky,Annemarie Pucci,Robert Lovrincic +10 more
TL;DR: High-quality infrared spectroscopic measurements of methylammonium lead halide perovskite films and single crystals at room temperature are reported, from which the dielectric function in the investigated spectral range is derived.