Results 151 to 160 of about 6,083,090 (295)

Processing and Properties of Lead-Free KNN-Based Ceramics

In the present work characterization of lead free ceramics based on KNN has been studied. Ceramics with the chemical composition (1-x)(K0.5Na0.5)Nb1-ySbyO3-xBaTiO3 (x=0.02, 0.04; y=0.04, 0.07) were prepared by conventional ceramic processing technology.
Livinsh, Maris, Kalvāne, Anna, Smeltere, Ilze, Antonova, Maija   +3 more
core  

Modeling and performance investigation of novel inorganic Cs4CuSb2Cl12 nanocrystal perovskite solar cell using SCAPS-1D

Results in Engineering
For the next generation of photovoltaic devices, perovskite solar cells (PSCs) appear as a good choice because they are simple and convert energy to electricity very efficiently.
Hironmoy Karmaker, Ayesha Siddique, Barun K. Das, Md Nurul Islam   +3 more
doaj   +1 more source

Conductive Tin Oxide Under the Thermal Budget of Perovskite/TOPCon Tandems: Toward Indium‐Free Contacts

Advanced Materials Technologies, EarlyView.
This work demonstrates that achieving conductive undoped SnOx contacts required careful tailoring of oxygen vacancy (VO) tuning and defect engineering. Controlling oxygen deposition pressure and low‐temperature annealing (300°C) optimizes defect stoichiometry and mitigates carrier scattering. This low thermal budget approach significantly enhances Hall
Paul Llontop, Mario Hanser, Matthew Wright, Soumyajit Maitra, Eloy J. Marcelis, Jana‐Isabelle Polzin, Martin Bivour, David C. Grinter, Pilar Ferrer, Iris C. G. van den Bosch, Christoph Baeumer, Ruy S. Bonilla, Armin Richter, Monica Morales‐Masis   +13 more
wiley   +1 more source

Unique Optoelectronic Properties and Applications of Lead‐Free Perovskites and Derivatives

Advanced Photonics Research
The pursuit of lead‐free alternatives to lead halide perovskites has gained significant momentum due to the environmental concerns associated with lead toxicity. The adverse effects of lead on human health and the environment have prompted a shift toward
Mingbian Li, Weijun Li, Haotong Wei
doaj   +1 more source

Electronic structures of lead-free Sn- or Ge-hybrid perovskite halides studied by first-principles calculation

Hybrid Advances
Although CH3NH3PbI3-based perovskite compounds have excellent photovoltaic properties, the lead (Pb) is harmful to the environment, and Pb-free perovskite compounds are needed for next generation solar cells.
Yu-Chen Kuo, Takeo Oku, Atsushi Suzuki, Iori Ono, Riku Okumura   +4 more
doaj   +1 more source

An Examination of the Cs2NaInCl6 Luminescence: Interplay of Self‐Generated In+ and Doped Sb3+, Er3+/Yb3+ Ions

Advanced Optical Materials, EarlyView.
A new luminescence mechanism in Cs2NaInCl₆ is revealed through spontaneously formed In3+→In+ centers and Er3+/Yb3+/Sb3+ doping. Tunable visible, near‐infrared, downconversion, and upconversion emissions are demonstrated, while DFT calculations explain the electronic structure.
Inna A. Ivashchenko, Alicja Szymska‐Szymanik, Lubomir D. Gulay, Alexander Eich, Galina Gurieva, Susan Schorr, Karina V. Lamonova, Marcin Nyk, Malgorzata Makowska‐Janusik, Benjamin González‐Diaze, Katarzyna Matras‐Postołek   +10 more
wiley   +1 more source

Visible‐Blind Near‐Infrared Organic Vision Sensors for Imaging in Adverse Environmental Conditions

Advanced Optical Materials, EarlyView.
This work presents high‐performance visible‐blind NIR OPDs enabled by a multilayer optical modulation layer. The devices achieve strong visible‐light suppression and enhanced NIR sensitivity, enabling robust imaging in foggy or low‐light environments.
Baozhong Deng, Kean Lu, Zhouyi Lu, Yi Li, Gaoyu Dai, Luqiao Yin, Zihan Wang, Bruno Grandidier, Tao Xu, Furong Zhu   +9 more
wiley   +1 more source

Highlights of a EC funded project on Lead-free Materials and Assembly Development Technology

, 2022
The EC has financially supported a pan-European collaboration on the development of lead-free interconnection materials and use of these materials for electronic assembly in a wide variety of industrial applications. The project started in April 2002 and
Vanfleteren, J., Vandevelde, B., Manessis, D., Gonzales, M.   +3 more
core  

Crossover From Excitonic to Bulk Emission in Metal Halide Perovskite Nanocomposites

Advanced Optical Materials, EarlyView.
A transition from excitonic to free‐charge recombination is uncovered in perovskite nanocomposites as a function of nanostructure size using PLQY(R, F) mapping as a function of excitation fluence (F) and repetition rate (R). These findings demonstrate that PLQY(R, F) mapping serves as a powerful and non‐invasive tool to extract quantitative information
Miriam Minguez‐Avellan, Alexandr Marunchenko, Víctor Sagra‐Rodríguez, Rafael Abargues, Pablo P. Boix, Ivan G. Scheblykin   +5 more
wiley   +1 more source

Thermodynamics of Concomitant Charge‐Transfer, Antiferromagnetic, and Isostructural Phase Transitions in Barocaloric ACu3Fe4O12 Quadruple Perovskites

Advanced Science, EarlyView.
A copper‐iron charge transfer instability drives concomitant electronic, magnetic, and isostructural phase transitions in ACu3Fe4O12${\rm ACu}_3{\rm Fe}_4{\rm O}_{12}$, with an inverse barocaloric effect. A minimal Landau theory ties these thermodynamic signatures together, revealing a pressure‐independent transition entropy with comparable charge and ...
Jefferson Delgado‐Quesada, Gian Giacomo Guzmán‐Verri   +1 more
wiley   +1 more source