Results 111 to 120 of about 75,173 (277)

Resistive Heating for Inducing Localized Crystal Growth in Organic Thin Film Devices

Advanced Materials Technologies, EarlyView.
Rubrene thin films are promising for organic optoelectronics due to high hole mobility. However, uncontrolled crystallization and grain boundaries from standard thermal processing hinder lateral device scalability. This work presents femtosecond‐laser micromachining and patterned resistive heating to induce localized, deterministic crystallization ...
Anna‐Lena Hofmann, Roozbeh Irandoost, Moritz Nützel, Tobias Antrack, Wooik Jang, Markas Sudzius, Hrisheekesh Thachoth Chandran, Gang Li, Johannes Benduhn, Karl Leo   +9 more
wiley   +1 more source

Growth of PdCoO2 by ozone-assisted molecular-beam epitaxy

APL Materials, 2019
We report the in situ, direct epitaxial synthesis of (0001)-oriented PdCoO2 thin films on c-plane sapphire using ozone-assisted molecular-beam epitaxy. The resulting films have smoothness, structural perfection, and electrical characteristics that rival ...
Jiaxin Sun, Matthew R. Barone, Celesta S. Chang, Megan E. Holtz, Hanjong Paik, Jürgen Schubert, David A. Muller, Darrell G. Schlom   +7 more
doaj   +1 more source

Solution‐Processed Spin‐Polarized Light‐Emitting Diodes of Colloidal Quantum Wells and Magnetic Nanoparticles

Advanced Optical Materials, EarlyView.
All‐solution‐processed spin‐LEDs based on colloidal Fe3O4 nanoparticles and CdSe/CdZnS core/shell CQWs that allows for polarization modulation of electroluminescence are fabricated. With these devices, electrical injection of spin‐polarized carriers from the Fe3O4 nanoparticle layer into the CdSe/CdZnS CQWs is demonstrated, realizing circularly ...
Savas Delikanli, Arinjoy Bhattacharya, Betul Canimkurbey, Chang Huai, Amani Almutairi, Arman Najafi, Hilal Korkut, Farzan Shabani, Furkan Isik, James Pientka, Ibrahim Sarpkaya, Hao Zeng, Richard D. Schaller, Athos Petrou, Hilmi Volkan Demir   +14 more
wiley   +1 more source

Scaling growth rates for perovskite oxide virtual substrates on silicon

Nature Communications, 2019
A scalable method for the growth of perovskite oxides thin films on silicon is desirable for integration of buffer layers in devices. Here the authors demonstrate the stoichiometric growth of thin SrTiO3 layers on silicon at high growth rates by hybrid ...
Jason Lapano, Matthew Brahlek, Lei Zhang, Joseph Roth, Alexej Pogrebnyakov, Roman Engel-Herbert   +5 more
doaj   +1 more source

AlGaN/GaN high electron mobility transistor heterostructures grown by ammonia and combined plasma-assisted ammonia molecular beam epitaxy [PDF]

, 2019
Ahmed Y. Alyamani, Е. В. Луценко, M. V. Rzheutski, Vitaly Z. Zubialevich, Aliaksei G. Vainilovich, I. E. Svitsiankou, V.A. Shulenkova, G. P. Yablonskii, С. И. Петров, A. N. Alexeev   +9 more
openalex   +1 more source

Improved Disorder Resilience in Small‐Footprint Photonic Cavities with Periodicity Breaking

Advanced Optical Materials, EarlyView.
Compact photonic crystal cavities with engineered aperiodicity are demonstrated to sustain high quality factormodes and enhanced reproducibility within a minimal footprint. Combining numerical optimization and near‐field measurements, the study reveals how controlled periodicity breaking improves disorder resilience, offering a robust and scalable ...
Nicoletta Granchi, Camilla Gonzini, Matteo Lodde, Gabriele Calusi, René P. J. van Veldhoven, Andrea Fiore, Guillermo Arregui, Francesca Intonti   +7 more
wiley   +1 more source

Temperature‐Dependent Zinc Oxide Cathodoluminescence: Toward Compact Wavelength‐Tunable Solid‐State Photoionization Sources

Advanced Optical Materials, EarlyView.
A proof‐of‐concept of a thermally‐tunable cathodoluminescence‐based light source is demonstrated using a wide‐bandgap z‐cut ZnO crystal as anode, resulting in the ultraviolet (UV) emission peak shifting from 398 nm to ~409 nm (3.115‐3.032 eV). Our results establish the feasibility of a compact, field‐deployable UV source with potential for gas sensing ...
Rui M. R. Pinto, Aritz Retolaza, João Cunha, Pedro Matos, Júlio Silva, Diana Silva, Rosana Alves Dias, K. B. Vinayakumar   +7 more
wiley   +1 more source

Concentric Multiple Rings by Droplet Epitaxy: Fabrication and Study of the Morphological Anisotropy

Nanoscale Research Letters, 2010
We present the Molecular Beam Epitaxy fabrication of complex GaAs/AlGaAs nanostructures by Droplet Epitaxy, characterized by the presence of concentric multiple rings.
Somaschini C, Bietti S, Fedorov A, Koguchi N, Sanguinetti S   +4 more
doaj   +1 more source

Electroluminescence and Franz–Keldysh Modulation Observed in Sn/Ge Multi‐Quantum Wells

Advanced Optical Materials, EarlyView.
We investigate the optoelectronic properties of PIN diodes based on ultrathin α‐Sn/Ge multiple quantum film structures, fabricated by molecular beam epitaxy, both experimentally and theoretically. The samples exhibit a light emission spectrum in the short‐wavelength infrared range with two transitions. Furthermore, when operating as a photodetector, we
Michael Oehme, Damiano Marian, Maurice Wanitzek, Christian Spieth, Daniel Schwarz, Florian Bärwolf, Markus Andreas Schubert, Alwin Daus, Michele Virgilio, Giovanni Capellini   +9 more
wiley   +1 more source

Growth Interruption Effect on the Fabrication of GaAs Concentric Multiple Rings by Droplet Epitaxy

Nanoscale Research Letters, 2010
We present the molecular beam epitaxy fabrication and optical properties of complex GaAs nanostructures by droplet epitaxy: concentric triple quantum rings.
Fedorov A, Somaschini C, Bietti S, Koguchi N, Sanguinetti S   +4 more
doaj   +1 more source