Results 241 to 250 of about 1,566,979 (286)

On boolean characterizations of planarity and planar embeddings of graphs

Annals of Operations Research, 1990
The author introduces a new planarity characterization for graphs, involving the solution of a quadratic Boolean equation. He then discusses seven combinatorially distinct configurations, called planarity obstacles, which lead to a graph whose order and size are linear functions of those of the original graph. Testing for planarity and finding a planar
openaire   +2 more sources

Efficient planar heterojunction perovskite solar cells by vapour deposition

Nature, 2013
Mingzhen Liu, M. Johnston, H. Snaith
semanticscholar   +1 more source

How to correct susceptibility distortions in spin-echo echo-planar images: application to diffusion tensor imaging

NeuroImage, 2003
J. Andersson, S. Skare, J. Ashburner
semanticscholar   +1 more source

Functional connectivity in the motor cortex of resting human brain using echo‐planar mri

Magnetic Resonance in Medicine, 1995
B. Biswal, F. Zerrin Yetkin, V. Haughton, James S. Hyde   +3 more
semanticscholar   +1 more source

The critical role of composition-dependent intragrain planar defects in the performance of MA1–xFAxPbI3 perovskite solar cells

Nature Energy, 2021
Wei Li, M. Rothmann, Ye Zhu, Weijian Chen, Chenquan Yang, Yong-bo Yuan, Y. Choo, X. Wen, Yi-bing Cheng, U. Bach, J. Etheridge   +10 more
semanticscholar   +1 more source

Formamidinium lead trihalide: a broadly tunable perovskite for efficient planar heterojunction solar cells

, 2014
G. Eperon, S. Stranks, C. Menelaou, M. Johnston, L. Herz, H. Snaith   +5 more
semanticscholar   +1 more source

SOLAR CELLS: Efficient and stable solution‐processed planar perovskite solar cells via contact passivation

, 2017
H. Tan, Ankit Jain, O. Voznyy, Xinzheng Lan, F. P. G. de Arquer, James Z. Fan, R. Quintero‐Bermudez, M. Yuan, Bo Zhang, Yicheng Zhao, Fengjia Fan, Peicheng Li, Lingyun Quan, Yong‐Biao Zhao, Zhenghong Lu, Zhenyu Yang, S. Hoogland, Edward H. Sargent   +17 more
semanticscholar   +1 more source

Planar Hexacoordinate Carbons: Half Covalent, Half Ionic

Angewandte Chemie - International Edition, 2021
Luis Leyva-Parra, Osvaldo Yanez, Diego Inostroza   +2 more
exaly  

Planar p–n homojunction perovskite solar cells with efficiency exceeding 21.3%

Nature Energy, 2019
P. Cui, Dong Wei, Jun Ji, Hao Huang, Endong Jia, Shangyi Dou, Tianyue Wang, Wenjing Wang, Meicheng Li   +8 more
semanticscholar   +1 more source

Enhanced electron extraction using SnO2 for high-efficiency planar-structure HC(NH2)2PbI3-based perovskite solar cells

Nature Energy, 2016
Qi Jiang, L. Zhang, Haolin Wang, Xiaolei Yang, J. Meng, Heng Liu, Z. Yin, Jinliang Wu, Xingwang Zhang, Jingbi You   +9 more
semanticscholar   +1 more source