Results 161 to 170 of about 513 (218)

Integrated Photoelectrode and Electrolyte Engineering via Carbon Quantum Dots for Self‐Powered H2O/O2‐Mediated Portable Photoelectrochemical Cells

Advanced Science, EarlyView.
Surface‐charged N‐CQDs serve as both electrolyte additives and photocathode modifiers. Electrodeposited N‐CQDs on Cu2O form a stable composite, steering 4e− ORR toward water. A quasi‐solid electrolyte with N‐CQDs aids charge migration, electrode‐electrolyte interfacial compatibility and replenishes active sites.
Yang Wu, Hui‐Min Duan, Chen‐Guang Li, Tian‐Xu Zeng, Jian‐Long Li, Xue‐Tong Cheng, Yun Jing, Wei‐Zhe Li, Qing Li, Xu Tian, Jiwu Zhao, Anders Thapper, Hong‐Yan Wang   +12 more
wiley   +1 more source

Advancing the Design of High‐Efficiency Printable Hole‐Conductor‐Free Mesoscopic Perovskite Solar Cells Through Machine Learning

Advanced Science, EarlyView.
Based on the largest printable mesoscopic perovskite solar cells database we established, stacking model achieved precise PCE prediction (R2 = 0.73, MAE = 2.18%). Multiple experiments verified the accuracy of the model, which guided the fabrication of high‐PCE devices with an efficiency of 19.36%.
Hao Meng, Jingzi Zhang, Xu Zhu, Yuelin Wang, Antai Yang, Kailong Hu, Chengquan Zhong, Jiakai Liu, Menghan Dun, Xi Lin   +9 more
wiley   +1 more source

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Tuning the Luminescence of Layered Halide Perovskites

Chemical Reviews, 2019
Layered halide perovskites offer a versatile platform for manipulating light through synthetic design. Although most layered perovskites absorb strongly in the ultraviolet (UV) or near-UV region, their emission can range from the UV to the infrared region of the electromagnetic spectrum.
Matthew D. Smith, Bridget A. Connor, Hemamala I. Karunadasa   +2 more
openaire   +2 more sources

Exfoliation of layered rutile and perovskite tungstates

Chemical Communications, 2002
The layered trirutile phases HMWO6 (M = Nb, Ta) and the layered perovskite H2W2O7 (synthesized by acid leaching of Bi2W2O9) were exfoliated into nanoscale colloids by reaction with quaternary ammonium hydroxides.
Raymond E, Schaak, Thomas E, Mallouk
openaire   +2 more sources

Brinkman-Rice transition in layered perovskites

Physical Review B, 1993
We consider a one-band model effective Hamiltonian ${\mathit{H}}_{\mathit{e}\mathit{f}\mathit{f}}$ deriv ed previously from the three-band model H for ${\mathrm{CuO}}_{2}$ planes. The parameters of ${\mathit{H}}_{\mathit{e}\mathit{f}\mathit{f}}$ are given in terms of those of H by a simple prescription.
, Simón, , Aligia
openaire   +2 more sources

Introduction of Graphene Nanofibers into the Perovskite Layer of Perovskite Solar Cells

ChemSusChem, 2018
AbstractAlthough the application of graphene‐derived nanomaterials in the electron transport layer (ETL), hole transport layer (HTL), or top electrode of perovskite solar cells (PSCs) has been thoroughly studied, the effects of inserting such materials into the perovskite layer of PSCs is not well understood. In this study, pristine graphene nanofibers
Yun Li, Wallace Woon‐Fong Leung
openaire   +2 more sources

Multifunctional layered hybrid perovskites

Journal of Materials Chemistry C, 2021
Layered hybrid perovskites incorporating organic moieties with enhanced functionalities within the perovskite scaffold enable the development of advanced multifunctional materials.
openaire   +1 more source

Polymerization of aniline in layered perovskites

Materials Science and Engineering: B, 1995
Abstract We report that aniline could be intercalated into the layered perovskites, HCa2Nb3O10 and HCa2Nb2MO9 (M  Al, Fe), and subsequently polymerized by treatment with (NH4)2S2O8, to give novel PANI-layered perovskite composites (PANI = polyaniline).
Uma, S, Gopalakrishnan, J
openaire   +1 more source

Topochemical Modification of Layered Perovskites

MRS Proceedings, 2008
AbstractTopochemical reaction strategies based on two-step intercalation methods are studied. Reactions involving reductive followed by oxidative intercalation are quite effective in making new compounds; the synthesis and characterization of (A2Cl)LaNb2O7 (A = Rb, Cs) are presented.
Jong-Lak Choi, Elisha Josepha, Xiao Zhang, John Wiley   +3 more
openaire   +1 more source

The Diversity of Layered Halide Perovskites

Annual Review of Materials Research, 2018
The two-dimensional congeners of the well-known three-dimensional perovskites display new properties enabled by their reduced dimensionality. Here, organic molecules separate inorganic sheets, affording the properties of both discrete molecules and extended solids in single, well-defined materials.
Matthew D. Smith, Ethan J. Crace, Adam Jaffe, Hemamala I. Karunadasa   +3 more
openaire   +1 more source