Results 71 to 80 of about 134,154 (310)

Smart phosphor with neuromorphic behaviors enabling full-photoluminescent Write and Read for all-optical physical reservoir computing

Nature Communications
The unprecedented growth in information across diverse media drives an urgent need for multifunctional materials and devices beyond conventional electrical paradigms.
Yifei Zhao, Man Li, Man Chung Wong, Xun Han, Feng Guo, Yuan Liu, Xinyue Lao, Zhaoying Dang, Sin-Yi Pang, Zehan Wu, Shi Ye, Jianhua Hao   +11 more
doaj   +1 more source

Trace Explosives Detection by Photoluminescence

The Scientific World Journal, 2004
Some field tests in counter-terrorism efforts to detect explosive traces employ chemistries that yield colored products. We have examined a test kit of this kind, ETKPlus, based on widely used chemistries and employed extensively by the Israel Police ...
E. Roland Menzel, Kimberly K. Bouldin, Russell H. Murdock   +2 more
doaj   +1 more source

Self‐Adaptive Anhydrous Passivation Mitigates Open‐Circuit Voltage Loss in Pb‐Sn Mixed Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
In this report, a self‐adaptive anhydrous passivation strategy is introduced by incorporating trimellitic anhydride (TMAH) into the perovskite precursor. In situ hydrolysis of TMAH yields trimellitic acid (TMA); ‐C═O/‐COO− groups of TMAH/TMA form a chelate with undercoordinated Pb2+/Sn2+, regulate nucleation, promote (100) orientation, passivate ...
Md. Ataur Rahman, Md. Abdul Karim, Md. Emrul Kayesh, Siliang Cao, Shamim Ahmmed, Kiyoto Matsuishi, Ashraful Islam   +6 more
wiley   +1 more source

Changes in impurity radiative recombination and surface morphology induced by treatment of GaP in weak magnetic field

Semiconductor Physics, Quantum Electronics & Optoelectronics, 2020
In this work, the results of studying the long-term changes in the intensity of photoluminescence bands and surface morphology of gallium phosphide caused by treatment in weak magnetic fields have been presented. A non-thermal mechanism based on the idea
R.A. Redko, G.V. Milenin, V.V. Milenin, S.M. Redko   +3 more
doaj   +1 more source

Template‐Confined Synthesis of Shape‐Engineered Single‐Crystal Gold Microplates in Lithographically‐Defined Polymeric Patterns

Advanced Functional Materials, EarlyView.
Single‐crystal gold microplates are high‐performance nanomaterials with an impressive wafer‐based application space. Progress has, however, been tempered by an inability to exert synthetic control over microplate size, shape, and positioning. In this work, control over these parameters is demonstrated using a seed‐mediated synthesis that both confines ...
Debasish Panda, Md Rashed Nizam, Walker J. Tuff, Collin C. Wyant, Maksym Zhukovskyi, Matthew R. Rosenberger, Botond Sánta, Edward C. Kinzel, Robert A. Hughes, Svetlana Neretina   +9 more
wiley   +1 more source

Origin of Photoluminescence, Exciton Binding Energy, Exciton-Phonon interaction, and Urbach Energy in γ-CsPbI3 Nanoparticles.

, 2022
Recently inorganic perovskites have had a deep impact in perovskites-based devices allowing the fabrication of high efficiency and high stability devices.
Ricardo, Marotti, Daniel, Gau, Ivana , Aguiar, Isabel , Galain   +3 more
core   +1 more source

Designed Lewis Acid–Base Passivation for High Performance Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
ABSTRACT Silicon's high cost and long energy payback time remain major barriers to the global expansion of solar power. In contrast, metal–halide perovskites offer abundant, solution‐processable absorbers, and have achieved efficiencies of 25%–30%, positioning them as strong competitors to silicon.
Afna Manaf, Hiba Shahulhameed, Bhabani Sankar Swain, Shengzhong (Frank) Liu, Adel Najar   +4 more
wiley   +1 more source

High-excitation effect on photoluminescence of sol-gel ZnO nanopowder

, 2012
[[abstract]]We studied the power-dependent photoluminescence of ZnO nanopowder grown by sol-gel method at low temperature. At moderate optical pumping intensity, two nonlinear emission bands due to the radiative recombination of free biexciton and the ...
Chou, W.C., Chiou, J.W., Lai, Y.J., Han, T.C., Chia, C.H., Hu, Y.M., 謝振豪   +6 more
core  

Extremely Long Electron Lifetime in Spontaneously Passivated Polycrystalline Perovskite Layers via Illumination‐Assisted Trap Filling

Advanced Functional Materials, EarlyView.
ABSTRACT Perovskite solar cells (PSCs) are promising next‐generation photovoltaics. The high performance of PSCs is attributed to the long carrier lifetimes of perovskite photoabsorbers. However, the carrier lifetimes of polycrystalline perovskite layers, which serve as the photoabsorbers in practical PSCs, have remained limited to several tens of ...
Naoyuki Nishimura, Ryuzi Katoh, Takurou N. Murakami   +2 more
wiley   +1 more source

Structural and Photoluminescence Properties of Ca2+-Substituted Self-Activated Photoluminescence Material of Na2TiSiO5

Journal of Mathematical and Fundamental Sciences
The effects of Ca2+ substitution on the structural and optical properties of Na2TiSiO5 were studied. It was expected that the Ca2+ ions would replace Na+ ions and change the coordination of Ti4+-O2- as a luminescence center. Na2(1‑x)CaxTiSiO5 (x = 0.00,
Dzaky Dian Ruhimat, Fainan Failamani, Bambang Prijamboedi   +2 more
doaj   +1 more source