Results 201 to 210 of about 124,796 (262)

Grain‐Boundary‐Enriched Cocatalyst Coupled With CuSCN Hole Transport Layer for Efficient Solar Water Oxidation in BiVO4 Photoanode

Advanced Science, EarlyView.
A grain‐boundary‐enriched NiFe cocatalyst is coupled with a CuSCN hole transport layer on BiVO4 photoanodes. The integrated architecture promotes hole extraction, interfacial charge transfer, and surface OER kinetics, highlighting cocatalyst microstructure regulation as a complementary strategy to hole transport layer engineering. ABSTRACT Solar‐driven
Wei Zhao, Yaorong He, Xiao Wang, Lin Zhu, Tong Su, Yujie Zhou, Xiang Li, Peiyao Du, Xiaoquan Lu   +8 more
wiley   +1 more source

Bioinspired Metastable Transient Peeling for Repeatable Rapid Release

Advanced Science, EarlyView.
Inspired by the explosive seed ejection of the squirting cucumber, this work introduces metastable transient peeling that temporally regulates stored interfacial energy release via a tunable energy barrier. A viscoelastic hemispherical gripper achieves 52 ms ultrafast, residue‐free release with 300 000‐cycle durability, enabling damage‐free handling of
Lvzhou Li, Qingyue Li, Yao Hu, Xu Dong, Xiangli Wen, Kai Zhu, Yaoyao Jiang, Yu Tian, Jianning Ding   +8 more
wiley   +1 more source

Self‐Healing Ionogel Dual‐Network Enables Synergistic Defect Passivation and Strain Relief for High‐Efficiency Robust Perovskite Photovoltaics

Advanced Science, EarlyView.
PSCs are afflicted by inherent defects and lattice strain that limit PCE and stability. A cross‐linked multifunctional ionogel [HA‐AA][EMIES] is developed to modulate crystallization, relieve residual strain, and passivate defects, extending carrier diffusion length to over 8 µm and delivering PCEs of 26.45% for rigid devices and 25.14% for flexible ...
Wen Wu, Gang Wang, Chen Liu, Xiao‐Li Du, Sheng Yang, Shao‐Long Wang, Jia‐Yi Tian, Ling‐Feng Chao, Xiang‐Feng Deng, Yi Jiang, Yong‐Hua Chen, Gui‐Chuan Xing, Wen‐Yong Lai   +12 more
wiley   +1 more source

Pressure‐Activated and Retained Blue Emission in Melamine Through Hydrogen‐Bond and Packing Regulation

Advanced Science, EarlyView.
Pressure treatment activates and retains bright blue emission in melamine (MA). The pressure‐modified hydrogen‐bonding network and molecular packing create a distinct local environment after decompression, changing the balance among competing excited‐state relaxation pathways and enabling retained emission.
Siyao Wang, Weiwei Dong, Shuo Yang, Jiayue Jiang, Yushuang Wang, Shuailing Ma, Peng Liu, Xiaodong Li, Haitao Wang   +8 more
wiley   +1 more source

Photoluminescence

, 2018
Quantum mechanics theory about photoluminescence is first introduced then applied to various case studies to understand the microscopic processes, namely photon excitation, energy relaxation and radiative recombination, involved in the photoluminescence ...
Wei Lu, Ying Fu
core   +3 more sources

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On photoluminescence in HgGa2S4

Journal of Luminescence, 2005
Abstract In this paper, we investigate the kinetics of photoluminescence in excited crystals of HgGa2S4 which have recently been proposed for implementing tunable luminescent devices. From photoluminescence experiments, performed at various temperatures and excitation powers, it appears that two kinds of radiative recombination processes take place ...
RICCI, PIER CARLO, SALIS, MARCELLO, ANEDDA A.   +2 more
openaire   +2 more sources

Photoluminescence and photoluminescence excitation study of CuGaTe2

Journal of Applied Physics, 1998
Photoluminescence (PL) and photoluminescence excitation measurements over a temperature range 12 K<T<300 K on high quality CuGaTe2 crystals grown by the vertical Bridgman method were completed. The whole PL spectrum consists of two regions.
J. Krustok, H. Collan, K. Hjelt, M. Yakushev, A. E. Hill, R. D. Tomlinson, H. Mändar, H. Neumann   +7 more
openaire   +1 more source

Photoluminescence and photoluminescence excitation spectroscopy of Al0.48In0.52As

Journal of Applied Physics, 1993
A detailed study of the photoluminescence (PL) and photoluminescence excitation (PLE) properties of Al0.48In0.52As is presented. A PL linewidth of 13 meV and a Stokes shift of only 9 meV at 4.2 K both indicate that the effect of clustering is minimal in our samples. The Stokes shift is three times lower than the lowest reported in the literature.
S. M. Olsthoorn, F. A. J. M. Driessen, A. P. A. M. Eijkelenboom, L. J. Giling   +3 more
openaire   +1 more source

The photoluminescence of SrS:Cu nanophosphor

Nanotechnology, 2008
Strontium sulfide doped with copper has been regarded as one of the most promising inorganic materials for the blue-green color phosphor. A wet chemical precipitation method with post-annealing is presented for the synthesis of copper-doped SrS nanoparticles. XRD studies revealed the phase purity of SrS particles with rocksalt structure.
E I, Anila, Arun, Aravind, M K, Jayaraj
openaire   +2 more sources

Photoluminescence and photoluminescence excitation spectra of GaAs grown directly on Si

Solid State Communications, 1986
ABSTRACTThe photoluminescence of GaAs/Si grown by OMCVD has been analyzed as a function of temperature and the dominant high temperature line identified as a conduction-band-to-valence-band transition. Photoluminescence excitation spectra indicate that the transition is excitonic at 4.2 K.
S. Zemon, S. K. Shastry, P. Norris, C. Jagannath, G. Lambert   +4 more
openaire   +1 more source