Results 91 to 100 of about 124,796 (262)

Photoluminescence from Er-doped Si-in-SiNx thin films

, 2007
Photoluminescence from Er3+-implanted Si-in-SiN, films emitting efficiently visible light were investigated. A Stark structure in the Er3+ photoluminescence spectrum was observed at room temperature, which reveals more than one site symmetry for the Er3+-
Hsu CC, Cao ZX, Chen WD, Song R, Bian LF, Ma LB, Zhang CG, Bian, LF, Chinese Acad Sci, Inst Semicond, State Key Lab Surface Phys, Beijing 100083, Peoples R China. 电子邮箱地址: guobian@semi.ac.cn   +7 more
core  

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

Theory of Photoluminescence by Metallic Structures

ACS Nano
Light emission by metals at room temperature is quenched by fast relaxation processes. Nevertheless, Mooradian reported in 1969 the observation of photoluminescence by metals pumped by a laser. Strikingly, while it is currently at the heart of many promising applications, this phenomenon is still poorly understood.
Loirette-Pelous, Aurelian, Greffet, Jean-Jacques   +1 more
openaire   +3 more sources

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

Realization of blue-emitting CsPb(Br1-xClx)3 nanocrystals via simultaneous halide exchange and defect passivation using dopamine hydrochloride

Communications Engineering
Halide perovskite nanocrystals are promising materials for optoelectronic devices due to their outstanding opto-electrical properties. However, achieving stable blue emission with high photoluminescence quantum yield remains challenging because of halide
Dokyum Kim, Jung Su Park, Sang-Youp Yim, Joon-Hyung Lee, Chang-Lyoul Lee   +4 more
doaj   +1 more source

Photoluminescence and photostimulated luminescence of BaFBr:Eu2+,Eu3+

, 1997
In the photoluminescence (PL) of BaFBr:Eu2+,Eu3+, the emissions of Ea(2+), carrier electron-hole (e-h) recombination, and Eu3+ are observed, while in the photostimulated luminescence (PSL) only the emission of Eu2+ is exhibited. This disappearance of e-h
Chen W, Chen W CHINESE ACAD SCIINST SEMICONDLAB SEMICOND MAT SCIBEIJING 100083PEOPLES R CHINA., Su MZ   +2 more
core  

Phase Engineering of Nanomaterials (PEN): Evolution, Current Challenges, and Future Opportunities

Advanced Materials, EarlyView.
This review summarizes the synthesis, phase transition, advanced characterization spanning ex situ to in situ and operando techniques, and diverse applications of phase engineering of nanomaterials (PEN). It further outlines key challenges and future opportunities, such as phase stability, architecture control, and artificial intelligence (AI)‐driven ...
Ye Chen, Zhanxi Fan, Jingjie Ge, Qiyuan He, Zhuangchai Lai, Jiawei Liu, Chaoliang Tan, Hua Zhang   +7 more
wiley   +1 more source

Regulating Phase Evolution and Crystallization Dynamics Enables Low Open‐Circuit Voltage Deficit in Wide‐Bandgap Cu2ZnSnS4 Solar Cells

Advanced Materials, EarlyView.
Bilayer composition‐modulated sulfurization (BCMS) regulates Cu redistribution in solution‐processed Cu2ZnSnS4, suppressing Cu2SnS3 and favoring the direct transformation pathway, while transforming the crystallization from surface‐dominated growth to a more synchronized process.
Hang Geng, Jingwen Cao, Jialiang Huang, Ao Wang, Zuoyun Wang, Xiaojie Yuan, Yidong Liu, Chenghan Zhao, Jialin Cong, Kaiwen Sun, Xiaojing Hao   +10 more
wiley   +1 more source

Differential Sedimentation and Cryo‐TEM Mapping Resolve Structural Heterogeneity in Conjugated Polymer Nanowires for Programmable Stretchable Electronics

Advanced Materials, EarlyView.
Density‐driven differential sedimentation fractionates solution‐assembled P3HT nanowires into crystalline and disordered constituents. High‐resolution cryo‐TEM directly visualizes the molecular chain packing within individual nanowires in real space, and recombining the fractions programs the mobility–stretchability trade‐off without chemical ...
Junyeon Yoon, Jun Ho Hwang, Eunji Lee
wiley   +1 more source

Tailoring Charge Donor–Acceptor Interaction in CsPbBr3 Perovskite Nanocrystals through Ligand Exchange

Small Science
The surface ligands in colloidal metal halide perovskites influence not only their intrinsic optoelectronic properties but also their interaction with other materials and molecules. Donor–acceptor interactions of CsPbBr3 perovskite nanocrystals with TiO2
Syed Abdul Basit Shah, Sushant Ghimire, Rostyslav Lesyuk, Maria Vittoria Diamanti, Vanni Lughi, Christian Klinke   +5 more
doaj   +1 more source