A
Aram Amassian
Researcher at North Carolina State University
Publications - 240
Citations - 22721
Aram Amassian is an academic researcher from North Carolina State University. The author has contributed to research in topics: Perovskite (structure) & Quantum dot. The author has an hindex of 71, co-authored 224 publications receiving 18606 citations. Previous affiliations of Aram Amassian include Imperial College London & École Polytechnique.
Papers
More filters
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.
Journal ArticleDOI
Ligand-Stabilized Reduced-Dimensionality Perovskites
Li Na Quan,Li Na Quan,Mingjian Yuan,Riccardo Comin,Oleksandr Voznyy,Eric M. Beauregard,Sjoerd Hoogland,Andrei Buin,Ahmad R. Kirmani,Kui Zhao,Aram Amassian,Dong Ha Kim,Edward H. Sargent +12 more
TL;DR: Reduced-dimensionality (quasi-2D) perovskite films are reported that exhibit improved stability while retaining the high performance of conventional three-dimensionalperovskites, and are achieved by the choice of stoichiometry in materials synthesis.
Journal ArticleDOI
Reducing the efficiency–stability–cost gap of organic photovoltaics with highly efficient and stable small molecule acceptor ternary solar cells
Derya Baran,Derya Baran,Derya Baran,Raja Shahid Ashraf,Raja Shahid Ashraf,David Hanifi,Maged Abdelsamie,Nicola Gasparini,Jason A. Röhr,Sarah Holliday,Andrew Wadsworth,Sarah Lockett,Marios Neophytou,Christopher J. M. Emmott,Jenny Nelson,Christoph J. Brabec,Aram Amassian,Alberto Salleo,Thomas Kirchartz,Thomas Kirchartz,James R. Durrant,Iain McCulloch,Iain McCulloch +22 more
TL;DR: This work demonstrates highly efficient and stable solar cells using a ternary approach, wherein two non-fullerene acceptors are combined with both a scalable and affordable donor polymer, poly(3-hexylthiophene) (P3HT), and a high-efficiency, low-bandgap polymer in a single-layer bulk-heterojunction device.
Journal ArticleDOI
Efficient charge generation by relaxed charge-transfer states at organic interfaces
Koen Vandewal,Steve Albrecht,Eric T. Hoke,Kenneth R. Graham,Johannes Widmer,Jessica D. Douglas,Marcel Schubert,William R. Mateker,Jason T. Bloking,George F. Burkhard,Alan Sellinger,Jean M. J. Fréchet,Aram Amassian,Moritz Riede,Michael D. McGehee,Dieter Neher,Alberto Salleo +16 more
TL;DR: For a wide range of photovoltaic devices based on polymer:fullerene, small-molecule:C60 and polymer:polymer blends, the study reveals that the internal quantum efficiency is essentially independent of whether or not D, A or CT states with an energy higher than that of CT1 are excited.