Results 81 to 90 of about 28,256 (297)

Perovskite Thin Films via Atomic Layer Deposition [PDF]

Advanced Materials, 2014
A new method to deposit perovskite thin films that benefit from the thickness control and conformality of atomic layer deposition (ALD) is detailed. A seed layer of ALD PbS is place-exchanged with PbI2 and subsequently CH3 NH3 PbI3 perovskite. These films show promising optical properties, with gain coefficients of 3200 ± 830 cm(-1) .
Sutherland, Brandon R., Hoogland, Sjoerd, Adachi, Michael M., Kanjanaboos, Pongsakorn, Wong, Chris T. O., McDowell, Jeffrey J., Xu, Jixian, Voznyy, Oleksandr, Ning, Zhijun, Houtepen, Arjan J., Sargent, Edward H.   +10 more
openaire   +3 more sources

Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry

Advanced Functional Materials, EarlyView.
In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite, Lilia Huynh, Natascha Gray, Quintin N. Meier, Marta D. Rossell, Morgan Trassin   +5 more
wiley   +1 more source

Absence of Long Range Magnetic Order in the La1.4Sr0.8Ca0.8Mn2O7 Bilayered Manganite

, 2006
In this work we studied, by means of high-resolution neutron diffraction as a function of temperature, the La1.4Sr0.8Ca0.8Mn2O7 bilayered manganite for two different annealing treatments.
Azzoni, Carlo Bruno, Flor, Giorgio, Malavasi, Lorenzo, Mozzati, Maria Cristina, Pomjakushin, Vladimir, Tealdi, Cristina   +5 more
core   +1 more source

Photoconductivity‐Driven Quantum Efficiency Gain in Inorganic Ruddlesden‐Popper Layered Cs2PbBr2I2 Perovskite Photodetector for Visible Light Detection

Advanced Functional Materials, EarlyView.
Rational halogen mixing strategy was employed to shift the bandgap of Cs2PbBr2I2 from ultraviolet to visible region, enabling first realization of a visible‐light photodetector with this 2D layered Ruddlesden‐Popper perovskite material. Under illumination, light‐induced internal field forms and drives trap‐mediated persistent photoconductivity ...
Md Fahim Al Fattah, Asif Abdullah Khan, Saikiran Khamgaonkar, Majid Haji Bagheri, Danyah Khan, Md Rasidul Islam, Mahmoud Almadoun, Aixi Pan, Alexander Li, Marwa Abd‐Ellah, Vivek Maheshwari, Dayan Ban   +11 more
wiley   +1 more source

Enhanced Stability of MAPbI3 Perovskite Films with Zirconium Phosphate‐Phosphonomethylglycine Nanosheets as Additive

Advanced Materials Interfaces, 2021
Methylammonium lead iodide perovskite (MAPbI3) is today considered the most promising component for highly efficient third generation solar cells. However, the lifetime of the solar devices is strongly affected by the stability of the MAPbI3 films toward
Nadir Vanni, Diletta Morelli Venturi, Eros Radicchi, Giulia Quaglia, Elena Cambiotti, Loredana Latterini, Filippo De Angelis, Ferdinando Costantino   +7 more
doaj   +1 more source

The nanoscale phase separation in hole-doped manganites

, 2007
A macroscopic phase separation, in which ferromagnetic clusters are observed in an insulating matrix, is sometimes observed, and believed to be essential to the colossal magnetoresistive (CMR) properties of manganese oxides. The application of a magnetic
Akahoshi D., Aliaga H., Attfield J. P., Barbara B., Chi S., Dagotto E., Dietl T., Dupuis V., Fisher D. S., Hanasaki N., Hansen M. F., Jirák Z., Jonason K., Jonsson T., Jönsson P. E., Jönsson P. E., Jönsson P. E., Kimura T., Kimura T., Liu S. Q., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mathieu R., Mattsson J., Mattsson J., Motome Y., Raveau B., Sen C., Sternlieb B. J., Susuki M., Taguchi Y., Takeshita N., Tokunaga Y., Tokunaga Y., Tokura Y., Tomioka Y., Tomioka Y., Uchida M., Wills A. S., Yamada H., Yu X. Z., Ziese M.   +47 more
core   +1 more source

Inorganic and Layered Perovskites for Optoelectronic Devices

Advanced Materials, 2019
AbstractOrganic–inorganic halide perovskites are making breakthroughs in a range of optoelectronic devices. Reports of >23% certified power conversion efficiency in photovoltaic devices, external quantum efficiency >21% in light‐emitting diodes (LEDs), continuous‐wave lasing and ultralow lasing thresholds in optically pumped lasers, and ...
Fakharuddin, Azhar, Shabbir, Umair, Qiu, Weiming, Iqbal, Tahir, Sultan, Muhammad, Heremans, Paul, Schmidt-Mende, Lukas   +6 more
openaire   +4 more sources

Broadband, Flexible, Skin‐Compatible Carbon Dots/Graphene Photodetectors for Wearable Applications

Advanced Functional Materials, EarlyView.
Broadband, flexible photodetectors integrating nitrogen‐rich carbon dots with single‐layer graphene on plastic substrates are demonstrated. A biocompatible chitosan–glycerol electrolyte enables efficient low‐voltage gating and on‐skin operation. The devices exhibit ultraviolet‐to‐near‐infrared response, mechanical robustness under bending, and verified
Nouha Loudhaief, Petr Rozhin, Ilaria Bertuol, Ali Raza, Leonardo Viti, Subhankar Roy, Enrico Cavarzerani, Luca Sbuelz, Matteo Brilli, Andrea Serinolli, Jacopo Nicoletti, Riccardo Piccoli, Sebastián Castilla, Simone Dal Zilio, Enrique Rodríguez‐Castellón, Miriam Serena Vitiello, Maurizio Selva, Flavio Rizzolio, Alvise Perosa, Giovanni Antonio Salvatore, Domenico De Fazio   +20 more
wiley   +1 more source

Illuminating the Devolution of Perovskite Passivation Layers

Small Structures
Surface treatment of perovskite materials with their layered counterparts has become an ubiquitous strategy for maximizing device performance. While layered materials confer great benefits to the longevity and long‐term efficiency of the resulting device
Marcin Giza, Aleksey Kozikov, Paula L. Lalaguna, Jake D. Hutchinson, Vaibhav Verma, Benjamin Vella, Rahul Kumar, Nathan Hill, Dumitru Sirbu, Elisabetta Arca, Noel Healy, Rebecca L. Milot, Malcolm Kadodwala, Pablo Docampo   +13 more
doaj   +1 more source

Superconductivity Above 40 K Observed in a New Iron Arsenide Oxide (Fe2As2)(Ca4(Mg,Ti)3Oy)

, 2010
A new layered iron arsenide oxide (Fe2As2)(Ca4(Mg,Ti)3Oy) was discovered. Its crystal structure is tetragonal with a space group of I4/mmm consisted of the anti-fluorite type FeAs layer and blocking layer of triple perovskite cells and is identical with (
Kawaguchi, Naoto, Kishio, Kohji, Ogino, Hiraku, Shimizu, Yasuaki, Shimoyama, Jun-ichi, Ushiyama, Koichi   +5 more
core   +1 more source