Results 281 to 290 of about 4,496,883 (327)

PbS/PbSe structures with core–shell type morphology synthesized from PbS nanocrystals

Nanotechnology, 2007
Colloidal PbS/PbSe nanostructures with core-shell type morphology have been synthesized for the first time using a simple chemical procedure where template PbS nanocrystals (NCs) were treated with Se solution in tributylphosphine at elevated temperature. The Se-coated PbS NCs were structurally and optically characterized by high resolution transmission
Dmitry S, Koktysh, James R, McBride, Sriram K, Dixit, L C, Feldman, Sandra J, Rosenthal   +4 more
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Inelastic effects in Cr–Cr2O3–Pb–SnxOy–Pb double tunnel structures

Low Temperature Physics, 2000
Cr–Cr 2 O 3 –Pb–Sn x O y – Pb double tunnel junctions in which inelastic tunneling processes occur, are fabricated. The change in the superconducting order parameter in the middle Pb film upon variation of the temperature, film thickness, and resistivity of the Cr2O3 layer is investigated.
Yu. I. Stepurenko, V. E. Shaternik, É. M. Rudenko   +2 more
openaire   +1 more source

Can Pb‐Free Halide Perovskites be Realized by Incorporating the Neutral or Anionic Molecule?

Advanced Theory and Simulations
Exploring Pb‐free perovskite alternatives is a major challenge in the current photovoltaic field. Direct substitution of Pb with a non‐toxic cation usually lowers the structural or electronic dimension, thereby impacting the excellent photovoltaic ...
Yuanmao Hu, Shuai Zhao, Lin Chen
semanticscholar   +1 more source

Avoiding Structural Collapse to Reduce Lead Leakage in Perovskite Photovoltaics.

Angewandte Chemie, 2022
Perovskite solar cells (PSCs) have become a promising candidate for the next-generation photovoltaic technologies. As an essential element for high-efficiency PSCs however, the heavy metal Pb is soluble in water, showing a serious threat to the ...
Xueyuan Wei, Mengqi Xiao, Boyu Wang, Chenyue Wang, Yuekang Li, Jing Dou, Zhenhua Cui, Jie Dou, Hailiang Wang, Sai Ma, Cheng Zhu, Guizhou Guizhou, Ning Yang, Tinglu Song, Huanping Zhou, Haining Chen, Yang Bai, Qi Chen   +17 more
semanticscholar   +1 more source

Structural features of Pb/Ag, Ag/Cu and Cu/Pb multilayers

Journal of Magnetism and Magnetic Materials, 1993
Abstract Layered structures of Pb/Ag, Ag/Cu and Cu/Pb films have been investigated by X-ray diffraction. The Pb/Ag and Ag/Cu films showed satellite peaks due to superlattice structures. The appearance of coherent layer stacking is discussed in terms of the crystal natures of the constituent elements including the lattice mismatch and surface energy.
O. Nittono, S. Ando, K. Hazama, J. Kozaki, N. Tanaka   +4 more
openaire   +1 more source

Crystal structure of `Pb'-1234 superconductor

Physica C: Superconductivity, 1998
Abstract A sample with a nominal composition of Pb:Sr:Ca:Cu=5.0:28.0:27.0:40.0 has been prepared by using a high-pressure synthesis technique. A micro-composition analysis by an energy dispersive X-ray (EDX) measurement indicated that the ratio of cations in the main phase was Pb:Sr:Ca:Cu=5.5:24.6:27.9:41.4.
X.-J Wu, T Tamura, S Adachi, T Tatsuki, K Tanabe   +4 more
openaire   +1 more source

Rational Electronic and Structural Designs Advance BiCuSeO Thermoelectrics

Advanced Functional Materials, 2021
In this work, a record high thermoelectric figure‐of‐merit ZT of 1.6 ± 0.2 at 873 K in p‐type polycrystalline Bi0.94Pb0.06CuSe1.01O0.99 by a synergy of rational band manipulation and novel nanostructural design is reported.
Yan Gu, Xiaolei Shi, Lin Pan, Weidi Liu, Qiang Sun, Xiao Tang, Liangzhi Kou, Qingfeng Liu, Yifeng Wang, Zhi-gang Chen   +9 more
semanticscholar   +1 more source

LEED structure analysis of Pb(110)

Surface Science, 1990
Abstract The multilayer relaxation of Pb(110) was investigated by LEED. Data were taken at 130 and 300 K using a computer controlled video based technique. They were analyzed by full dynamical calculations. A quantitative comparison between experiment and theory via the Pendry R -factor confirms the strong contraction of the first layer spacing ...
U. Breuer, K.C. Prince, H.P. Bonzel, W. Oed, K. Heinz, G. Schmidt, K. Müller   +6 more
openaire   +1 more source

Highly Efficient and Stable GABr‐Modified Ideal‐Bandgap (1.35 eV) Sn/Pb Perovskite Solar Cells Achieve 20.63% Efficiency with a Record Small Voc Deficit of 0.33 V

Advances in Materials, 2020
1.5–1.6 eV bandgap Pb‐based perovskite solar cells (PSCs) with 30–31% theoretical efficiency limit by the Shockley–Queisser model achieve 21–24% power conversion efficiencies (PCEs).
Xianyong Zhou, Luozheng Zhang, Xingzhu Wang, Chang Liu, Shi Chen, Meiqing Zhang, Xiangnan Li, Wendi Yi, Baomin Xu   +8 more
semanticscholar   +1 more source

Structure of liquid K-Pb alloys

Physica B+C, 1987
The structure factors of liquid Pb, Ko.zsPbo 75r KO 6sPbo 35 and Ko.80Pbo 2ohave been measured by means of neutron diffraction. The main peaks of the structure factorsof the alloys are preceded by a pre-peak which is most pronounced in Ko,50Pbo This prepeakindicates that there is considerable orderingin the alloys, although there is also evidencefor a ...
Reijers, HTJ, van der Lugt, W, van Dijk, C   +2 more
openaire   +2 more sources