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Nanometer-scale monitoring of quantum-confined Stark effect and emission efficiency droop in multiple GaN/AlN quantum disks in nanowires

Publications associées (96)

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Submolecular Electroluminescence Mapping of Organic Semiconductors

Klaus Kern, Anna Maria Roslawska, Christoph Grosse

The electroluminescence of organic films is the central aspect in organic light emitting diodes (OLEDs) and widely used in current display technology. However, its spatial variation on the molecular scale is essentially unexplored. Here, we address this is ...

American Chemical Society2017

Nanoporous silicon tubes: the role of geometry in nanostructure formation and application to light emitting diodes

Anna Fontcuberta i Morral, Heidi Andrea Potts, Luca Francaviglia, Jelena Vukajlovic Plestina, Francesca Amaduzzi

Obtaining light emission from silicon has been the holy grail of optoelectronics over the last few decades. One of the most common methods for obtaining light emission from silicon is to reduce it to a nanoscale structure, for example by producing porous s ...

Institute of Physics2017

Luciferases with tunable emission wavelengths

Kai Johnsson, Luc Reymond, Rudolf Griss, Alberto Schena, Qiuliyang Yu, Olivier Vincent Sallin, Lin Xue, Julien Hiblot, Nicholas Clarke Hill, Marina Daniela Beatrice Sabbadini

We introduce luciferases whose emission maxima can be tuned to different wavelengths by chemical labeling. These tunable luciferases are generated by inserting the small luciferase NanoLuc into the structures of the self-labeling proteins SNAP-tag or HaloT ...

Wiley-Blackwell2017

Manufacturing of orifices in glass like materials, e.g. Nanocapillaries, and objects obtained according to this process

Aleksandra Radenovic, Lorenz Jan Steinbock

The ability to reshape nanopores and observe their shrinkage under an electron microscope is a powerful and novel technique14,17. It increases the sensitivity of the resistive pulse sensing and enables to detect very short and small molecules12,31. However ...

2016

Electron beam dynamics in an ultrafast transmission electron microscope with Wehnelt electrode

High temporal resolution transmission electron microscopy techniques have shown significant progress in recent years. Using photoelectron pulses induced by ultrashort laser pulses on the cathode, these methods can probe ultrafast materials processes and ha ...

Elsevier Science Bv2016

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Compositional disorder has important consequences on the optical properties of III-nitride ternary alloys. In AlGaN epilayers and AlGaN-based quantum heterostructures, the potential fluctuations induced by such disorder lead to the localisation of carriers ...

Iop Publishing Ltd2016

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The strain and compositional fluctuations of nearly lattice-matched Al0.81In0.19N/GaN heterostructures are investigated by cross-sectional scanning tunneling microscopy and selected area electron diffraction measurements in scanning electron transmission m ...

Amer Inst Physics2016

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We study the carrier-density-dependent recombination dynamics in m-plane InGaN/GaN multiple quantum wells in the presence of n-type background doping by time-resolved photoluminescence. Based on Fermi's golden rule and Saha's equation, we decompose the rad ...

Amer Physical Soc2016

The mechanism for the growth of 3D ZnO nanowall networks in nest-like structure by a pulsed laser deposition (PLD) technique have been investigated for dye sensitized solar cells (DSSCs) and biosensor applications. As complex oxides shift towards large vol ...

Elsevier2015

Core-shell InGaN/GaN nanowire light emitting diodes analyzed by electron beam induced current microscopy and cathodoluminescence mapping

Hua Zhang, Gwénolé Jean Jacopin

We report on the electron beam induced current (EBIC) microscopy and cathodoluminescence (CL) characterization correlated with compositional analysis of light emitting diodes based on core/shell InGaN/GaN nanowire arrays. The EBIC mapping of cleaved fully ...

Royal Soc Chemistry2015