Results 71 to 80 of about 23,841 (308)

Rethinking Charge Transport and Recombination in Donor‐Diluted Organic Solar Cells

Advanced Materials, EarlyView.
Organic solar cells with 1–45% PM6 content in Y12 were studied to link structure and charge dynamics to performance. The conductivity follows a 3D percolation model without a sharp threshold. Donor dilution preserves the photogeneration yield, but limits the fill factor due to transport resistance losses.
Chen Wang, Christopher Wöpke, Toni Seiler, Jared Faisst, Mathias List, Meike Kuhn, Bekcy Joseph, Alexander Ehm, Dietrich R. T. Zahn, Yana Vaynzof, Eva M. Herzig, Roderick C. I. Mackenzie, Uli Würfel, Maria Saladina, Carsten Deibel   +14 more
wiley   +1 more source

High peak power sub-nanosecond mode-locked pulse characteristics of Nd:GGG laser [PDF]

, 2015
Based on the dual-loss modulation, i.e. electro-optic (E0) modulator and GaAs saturable absorber, a sub-nanosecond mode-locked pulsed Nd:GGG laser with kHz repetition rates is presented for the first time.
Li, Dechun, Wang, Yonggang, Yang, Kejian, Li, Tao, Feng, Chuansheng, Li, Guiqiu, Qiao, Wenchao, Zhao, Jia, Zhao, Shengzhi, Li, Yufei   +9 more
core   +1 more source

Analysis of Shape Geometry and Roughness of Ti6Al4V Parts Fabricated by Nanosecond Laser Ablation

Micromachines, 2018
Laser milling is a micro-machining process that uses a laser beam as a tool to remove material through the layer-by-layer ablation mechanism. Generally in laser ablation, the quality of parts is reduced by melt accretions and thermal damage; therefore ...
Sabina Luisa Campanelli, Fulvio Lavecchia, Nicola Contuzzi, Gianluca Percoco   +3 more
doaj   +1 more source

Pulsed Laser‐Assisted Phase Engineering of Multimetallic Colloidal Nanocrystals With Complex Compositions

Advanced Materials, EarlyView.
The engineering of colloidal nanocrystals with complex compositions has emerged as a highly active area of research within nanomaterials science. This review covers key aspects of colloidal solid‐solution nanocrystal formation using pulsed laser irradiation.
Marina T. Candela, Sergio Triviño‐Sánchez, Andrés Guerrero‐Martínez, Luis M. Liz‐Marzán, Guillermo González‐Rubio   +4 more
wiley   +1 more source

Laser-induced forward transfer techniques for printing functional materials and photonic devices [PDF]

, 2011
The subject of this thesis is to study the Laser-Induced Forward Transfer (LIFT) technique using a time-resolved method in order to gain a better insight into the dynamics of the transfer process and to use the technique for rapid prototyping of photonic
Kaur, Kamalpreet
core  

Laser-induced forward transfer of focussed ion beam pre-machined donors [PDF]

, 2011
In this paper we report femtosecond laser-induced forward transfer (LIFT) of pre-machined donor films. 1 µm thick zinc oxide (ZnO) films were first machined using the focussed ion beam (FIB) technique up to a depth of 0.8 µm. Debris-free micro-pellets of
Banks, D.P., Sones, C.L., Ou, J-Y., E. Verona, F. Di Pietrantonio, R.W. Eason, M. Feinaeugle, D.P. Banks, J.Y. Ou, C.L. Sones, Di Pietrantonio, F., Feinäugle, M., Kaur, K.S., K.S. Kaur, Verona, E., Eason, R.W.   +15 more
core   +1 more source

Thermal damage behavior and material removal mechanism during femtosecond and nanosecond laser ablation of refractory metal molybdenum

Journal of Materials Research and Technology
This study focused on contrasting the thermal damage and material removal mechanisms of the refractory metal molybdenum in ablation processes generated by short-pulse lasers(nanosecond) and ultra-short-pulse(femtosecond) lasers.
Jie Ning, Han Yu, Jia-Xuan Zhao, Lin-Jie Zhang, Suck-Joo Na   +4 more
doaj   +1 more source

Nanosecond laser coupling for increased filament ablation

Optics Letters, 2019
Laser filaments can project intensities sufficient to ablate materials at long ranges, but the clamping of a filament's intensity to ∼1014  W/cm2 limits the effective ablation of targets with which the laser pulses interact. We seek to identify regimes in which auxiliary radiation can be used to augment the ablation created by single filaments. In this
Haley, Kerrigan, Shermineh Rostami, Fairchild, Martin, Richardson   +2 more
openaire   +2 more sources

Phase Engineering of Atomically Precise Nanoclusters (APNCs) of Gold and Beyond

Advanced Materials, EarlyView.
Engineering the structural phase of materials is of paramount importance for both fundamental research and practical applications. In this Review, we summarize the recent progress in controlling the phases of atomically precise nanoclusters (APNCs) of gold, silver and copper, as well as bimetallic systems. The phase‐enabled material properties of APNCs
Yitong Wang, Avirup Sardar, Weijie Ji, Zhongyu Liu, Rongchao Jin   +4 more
wiley   +1 more source

Fabrication of Hydrophobic Structures by Nanosecond Pulse Laser [PDF]

, 2017
In this paper, a feasibility study of manufacturing anti-bacteria surface on stainless steel 7C27Mo2 used for surgical tools by using nanosecond pulse laser is presented. The effect of laser power on the depth of groove was studied through laser cutting experiment. Micro-pillar arrays of different dimensions and spacing were generated by laser cutting.
Cai, Yukui, Sousa, Ana M. L., Lau, King Hang Aaron, Chang, Wenlong, Luo, Xichun   +4 more
openaire   +2 more sources