Results 111 to 120 of about 2,049 (291)

Exploring Pb‐Chelation Chemistry in the Crystallization Dynamics of Halide Perovskites

Advanced Functional Materials, EarlyView.
A mechanism of how Pb‐chelation chemistry governs coordination geometry and initial nucleation behavior at the precursor level of halide perovskite, by regulating the deprotonation state of a chelating additive, is elucidated. This allows for innovative reaction‐system design principles that promote coherent growth while suppressing defect formation in
Byeong Jun Kim, Inseo Cho, Jung Geon Son, Yifan Yu, Gunhee Kim, Eunseo Shin, Seyeon Eom, Minsub Um, Subeom Shin, Hyungju Ahn, Dong Suk Kim, Hochan Song, Hyosung Choi, Jonghee Yang   +13 more
wiley   +1 more source

Q-switched erbium-doped fibre laser based on molybdenum disulfide and tungsten disulfide as saturable absorbers

, 2017
A passively Q-switched erbium-doped fibre laser is experimentally implemented, using molybdenum disulfide (MoS2) and tungsten disulfide (WS2) as saturable absorbers.
Hamida, Belal Ahmed, L Hussein, S Harun, Ahmat, M.O., EL El Ismail, Hussein, L.A., N Kadir, B Hamida, Oumar, Mahamat, Mohamed, Khadar, Ismail, El I., A Latif, Harun, Sulaiman Wadi, liban, Hussein, Ismail, Ezzatul Irradah, Kadir, N.A.A., Latif, Amirah Abdul, M Ahmat, Abdul Kadir, Noraniza, Abdul Latif, Amirah, Khan Sheroz, Khan, Sheroz, Mohamed, K.H., K Mohamed   +23 more
core   +1 more source

Q‐Switched Mode‐Locking in Er‐Doped ZrF4‐BaF2‐LaF3‐AlF3‐NaF Fiber Lasers Using Carbon Nanotube–Saturable Absorber and GaSb‐Based Semiconductor‐Saturable Absorber Mirror

Advanced Photonics Research
Mid‐infrared (IR) fiber lasers are crucial for applications in spectroscopy, medical diagnostics, and environmental sensing, owing to their ability to interact with fundamental molecular vibrational bands.
Boris Perminov, Aram Mkrtchyan, Yuriy Gladush, Dmitry V. Krasnikov, Albert G. Nasibulin, Maria Chernysheva   +5 more
doaj   +1 more source

Electrode and Microstructure Dependence of Oxygen Diffusion in Ferroelectric Hafnium Zirconium Oxide Thin Films

Advanced Functional Materials, EarlyView.
Significant nanoscale oxygen diffusion coefficient variations are measured in ferroelectric hafnium zirconium oxide films with grain boundaries and electrode interfaces exhibiting values 104 times larger than the grain cores. Overall coefficients are 10X larger for films prepared with metal nitride electrodes compared to refractory metals. New insights
Liron Shvilberg, Thomas W. Pfeifer, Chuanzhen Zhou, Yong Kyu Choi, Duk‐Hyun Choe, Patrick E. Hopkins, Jon F. Ihlefeld   +6 more
wiley   +1 more source

Comparison of parameters of q-switching saturable absorbers estimated by different models and the impact of accuracy of input data on the results of the estimation

, 2014
Descriptions of the main classical models used to estimate the principal parameters of q-switching saturable absorbers are presented. On the basis of these models comparative analysis of q-switching saturable absorbers was done and the best one chosen ...
Młyńczak, J., Kopczyński, K.
core   +1 more source

Graphene‐Coupled Terahertz Semiconductor Lasers for Enhanced Passive Frequency Comb Operation

Advanced Science, 2019
Optical frequency combs, consisting of well‐controlled equidistant frequency lines, have been widely used in precision spectroscopy and metrology. Terahertz combs have been realized in quantum cascade lasers (QCLs) by employing either an active mode ...
Hua Li, Ming Yan, Wenjian Wan, Tao Zhou, Kang Zhou, Ziping Li, Juncheng Cao, Qiang Yu, Kai Zhang, Min Li, Junyi Nan, Boqu He, Heping Zeng   +12 more
doaj   +1 more source

Moving Beyond Oligoethers: Polar Side‐Chain Engineering for Aqueous Mixed Ionic–Electronic Conductors

Advanced Functional Materials, EarlyView.
We investigate how side‐chain chemistry and hydrogen bonding affect electrochemical doping in poly(propylenedioxythiophene) polymers. Replacing oligoether side chains with hydroxyl or carboxylic acid groups nearly triples electrochemical conductivity.
Joshua M. Rinehart, Anna M. Österholm, James F. Ponder Jr., Lucas Q. Flagg, Lee J. Richter, John R. Reynolds   +5 more
wiley   +1 more source

Ultrafast Fiber Lasers Using Novel Semiconductor Saturable Absorbers and Photonic-Crystal Dispersion Compensators [PDF]

, 2007
This thesis is concerned with development and demonstration of new techniques for mode-locked fiber lasers using semiconductor saturable absorbers and advanced dispersion compensators.
Isomäki, Antti
core  

Dual‐Function Interface Engineering for δ‐Phase‐Free Crystallization Toward Efficient and Stable FAPbI3 Perovskite Solar Cells

Advanced Functional Materials, EarlyView.
This work presents a dual‐function interface engineering strategy using PEACl to suppress the formation of the non‐perovskite δ‐FAPbI3 phase at the critical SnO2 buried interface. This approach enables the direct crystallization of the photoactive α‐phase, yielding highly efficient and stable rigid (25.6%) and flexible perovskite solar cells with ...
Xiao Wu, Shengyuan Wang, Pok Fung Chan, Zhenyi Ni, Hengkai Zhang, Chun‐Jen Su, Junyi Zhu, Xinhui Lu   +7 more
wiley   +1 more source

Near‐Infrared Light‐Driven Zn/Au Janus Micromotors for Multiplex SERS Detection of Anticancer Drugs

Advanced Functional Materials, EarlyView.
Zn/Au Janus micromotors, propelled by thermophoretic effects under NIR light, function as active SERS platforms for single and multiplex detection of anticancer drugs. Their dynamic motion enhances analyte exchange at the Au interface, reducing saturation and competitive adsorption, thereby improving sensitivity and extending the linear detection range.
Tijana Maric, Gohar Soufi, Ziqiao Li, Erick Chica, Amran Abdirasheed Ali Jinow, Nada Al‐Roubaï, Noor Ahmed, Yaman Göksel, Anja Boisen   +8 more
wiley   +1 more source