Prof. Aram Amassian Profile

Prof. Aram Amassian

Professor at North Carolina State Univ

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Publications (12)

Proceedings Article | 3 October 2022 Presentation

Colloidal nanostructures control the formation and orientation of quantum wells in layered hybrid perovskites (Conference Presentation)

Kasra Darabi, Dovletgeldi Seyitliyev, Boyu Guo, Fazel Bateni, Tonghui Wang, Masoud Ghasemi, Laine Taussig, Milad Abolhasani, Kenan Gundogdu, Aram Amassian

Proceedings Volume PC12208, PC122080C (2022) https://doi.org/10.1117/12.2633675

KEYWORDS: Quantum wells, Perovskite, Nanostructures, Thin films, Crystals, X-rays, X-ray characterization, Thin film solar cells, Thin film devices, Solar energy

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Proceedings Article | 3 October 2022 Presentation

Multi-scale ordering of PEDOT and PSS in the presence of ionic salts enables water-stable 2D/3D printable conductors and devices (Conference Presentation)

Laine Taussig, Masoud Ghasemi, Sanggil Han, Tatiana Proksch, Ruipeng Li, Enrique Gomez, Albert Kwansa, Yaroslava Yingling, George Malliaras, Aram Amassian

Proceedings Volume PC12211, PC122110F (2022) https://doi.org/10.1117/12.2633568

KEYWORDS: Solid state electronics, Crystals, Water, Transmission electron microscopy, Thin films, Printing, Photovoltaics, Optoelectronics, Molecular self-assembly, Electrodes

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Proceedings Article | 3 October 2022 Presentation

Quantitative multiscale diffusion framework for metal halide perovskites

Masoud Ghasemi, Boyu Guo, Chiung-Wei Huang, Garrett Baucom, Kasra Darabi, Laine Taussig, Tonghui Wang, Taesoo Kim, Joanna Atkin, Aram Amassian

Proceedings Volume PC12209, PC122090H (2022) https://doi.org/10.1117/12.2633471

KEYWORDS: Diffusion, Perovskite, Metals, Mass spectrometry, Ions

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Proceedings Article | 3 August 2021 Presentation

Accelerating hybrid perovskite research through robotic micro-experimentation

Aram Amassian

Proceedings Volume 11808, 1180819 (2021) https://doi.org/10.1117/12.2602797

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Proceedings Article | 20 August 2020 Poster

An all-solution-processed interconnecting layer for highly reproducible and efficient tandem organic solar cells

Carr Ho, Taesoo Kim, Yuan Xiong, Yuliar Firdaus, Shuo Ding, Aram Amassian, Harald Ade, Thomas Anthopoulos, Franky So

Proceedings Volume 11474, 114741M (2020) https://doi.org/10.1117/12.2568564

KEYWORDS: Organic photovoltaics, Solar cells, Tandem solar cells, Absorption, Organic semiconductors, Light harvesting, Aluminum, Polymers, Device simulation

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Proceedings Article | 10 September 2019 Presentation

Phase segregation control in mixed halide and mixed cation perovskite films: Synergistic effects of Cs and Rb (Conference Presentation)

Hoang Dang, Kai Wang, Masoud Ghasem, Michele De Bastiani, Detlef-M. Smilgies, Stefaan De Wolf, Aram Amassian

Proceedings Volume 11094, 1109413 (2019) https://doi.org/10.1117/12.2529560

KEYWORDS: Perovskite, Cesium, Rubidium, Solids, Crystals, Lead, Grazing incidence, X-rays, Scattering, Chemical elements

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Proceedings Article | 3 October 2017 Presentation

Nanoscale energetic mapping of bulk heterojunction solar cells (Conference Presentation)

Sukumar Dey, Hanlin Hu, Weimin Zhang, Iain Macculloch, Aram Amassian

Proceedings Volume 10348, 1034803 (2017) https://doi.org/10.1117/12.2273310

KEYWORDS: Interfaces, Heterojunctions, Solar cells, Spectroscopy, Scanning tunneling microscopy, Fullerenes, Annealing, Polymers, Nanomaterials, Electron transport

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Proceedings Article | 19 September 2017 Presentation

Organic thin-film transistor fabrication using a laser printer (Conference Presentation)

Peter Diemer, Angela Harper, Muhammad Rizwan Khan Niazi, John Anthony, Aram Amassian, Oana Jurchescu

Proceedings Volume 10365, 1036509 (2017) https://doi.org/10.1117/12.2275249

KEYWORDS: Thin films, Organic semiconductors, Transistors, Nonimpact printing, Organic electronics, Measurement devices, Printing, Flexible circuits, Manufacturing, Vacuum equipment

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Organic electronic materials are desirable due to facile and low-cost manufacturing through solution deposition. However, the inherit difficulties of reproducibility and solvent compatibility, as well as the hazards associated with the solvents, have stifled the progress of realizing practical solution-deposition methods. As a result, organic thin-films used in industry are typically produced by thermal evaporation techniques, which largely negate the benefits due to the higher cost and complexity of vacuum and evaporation equipment. Here we report the use of a conventional office laser printer to electrophotographically deposit the organic semiconductor layer in thin-film transistors. We have successfully used this solvent-free, low-cost method to produce the first laser-printed organic semiconductor layer in thin-film transistors. We printed on flexible and transparent polyethylene terephthalate (PET) substrates. We used the highly hydrophobic fluoropolymer Cytop as the dielectric in a bottom-gate, bottom-contact configuration, a feat that is not possible with traditional solution-deposition. The organic semiconductor layer consisted of a toner powder based on triisopropylsilylethynyl pentacene (TIPS Pn). Grazing incidence wide-angle X-ray scattering (GIWAXS) images indicated both edge- and face-on orientations of the semiconductor for these devices while electrical measurements revealed field-effect mobilities up to 10-3 cm2V¬-1s-1 and on/off current ratio of 103. Our method has the combined advantages of low temperature and ambient pressure deposition while eliminating the drawbacks of solvents or the high cost of evaporation equipment. Further, as a digital printing method, the laser-printed layer is easily patternable as designed by any convenient graphics software. Since the powder is transferred in a dry state, surface dewetting is no longer an issue, which opens the door to even more substrate/dielectric materials that would otherwise reject solutions from adhering.

Proceedings Article | 29 August 2017 Paper

Analysis and control of optical film growth by in situ real-time spectroscopic ellipsometry

Aram Amassian

Proceedings Volume 10313, 103134U (2017) https://doi.org/10.1117/12.2283970

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Proceedings Article | 12 October 2015 Presentation

Polymer solar cells with efficiency >10% enabled via a facile solution-processed Al-doped ZnO electron transporting layer (Presentation Recording)

Lethy Jagadamma, Mohammed Al-Senani, Aram Amassian

Proceedings Volume 9567, 956719 (2015) https://doi.org/10.1117/12.2189025

KEYWORDS: Solar cells, Zinc oxide, Electron transport, Polymers, Heterojunctions, Glasses, Nanoparticles, Thin films, Aluminum, Doping

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Proceedings Article | 5 October 2015 Presentation

Bromination of graphene: a new route to making high performance transparent conducting electrodes with low optical losses (Presentation Recording)

Ahmed Mansour, Aram Amassian, Minas Tanielian

Proceedings Volume 9552, 95520A (2015) https://doi.org/10.1117/12.2187273

KEYWORDS: Graphene, Electrodes, Transmittance, Resistance, Doping, Bromine, Industrial chemicals, Indium, Tin, Oxides

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Proceedings Article | 17 August 2014 Paper

The roles of bulk and interfacial molecular orientations in determining the performance of organic bilayer solar cells (presentation video)

Guy Ngongang Ndjawa, Kenneth Graham, Sarah Conron, Patrick Erwin, Ruipeng Li, Kang Wei Chou, George Burkhard, Lethy Krishnan Jagadamma, Eric Hoke, Michael McGehee, Mark Thompson, Aram Amassian

Proceedings Volume 9165, 916506 (2014) https://doi.org/10.1117/12.2063817

KEYWORDS: Solar cells, Video, Molecules, Interfaces, Photovoltaics, Modulation, Chemistry, Nanomaterials, Current controlled current source

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Showing 5 of 12 publications

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