Enhanced Rashba Indirect Exciton Emission in 2D Dion–Jacobson Perovskite Microplates via Efficient Photon Recycling

2021 ◽  
pp. 2102103
Author(s):  
Haizhen Wang ◽  
Lihan Liang ◽  
Junze Li ◽  
Wendian Yao ◽  
Dehui Li
Keyword(s):  
Exciton Emission ◽  
Indirect Exciton ◽  
Photon Recycling

scholarly journals Recent advancements and perspectives on light management and high performance in perovskite light-emitting diodes

Nanophotonics ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shaoni Kar ◽  
Nur Fadilah Jamaludin ◽  
Natalia Yantara ◽  
Subodh G. Mhaisalkar ◽  
Wei Lin Leong
Keyword(s):  
High Performance ◽  
Light Propagation ◽  
Light Emission ◽  
Review Article ◽  
Rapid Progress ◽  
Light Emitting ◽  
Materials Engineering ◽  
Perovskite Materials ◽  
Light Management ◽  
Photon Recycling

Abstract Perovskite semiconductors have experienced meteoric rise in a variety of optoelectronic applications. With a strong foothold on photovoltaics, much focus now lies on their light emission applications. Rapid progress in materials engineering have led to the demonstration of external quantum efficiencies that surpass the previously established theoretical limits. However, there remains much scope to further optimize the light propagation inside the device stack through careful tailoring of the optical processes that take place at the bulk and interface levels. Photon recycling in the emitter material followed by efficient outcoupling can result in boosting external efficiencies up to 100%. In addition, the poor ambient and operational stability of these materials and devices restrict further commercialization efforts. With best operational lifetimes of only a few hours reported, there is a long way to go before perovskite LEDs can be perceived as reliable alternatives to more established technologies like organic or quantum dot-based LED devices. This review article starts with the discussions of the mechanism of luminescence in these perovskite materials and factors impacting it. It then looks at the possible routes to achieve efficient outcoupling through nanostructuring of the emitter and the substrate. Next, we analyse the instability issues of perovskite-based LEDs from a photophysical standpoint, taking into consideration the underlying phenomena pertaining to defects, and summarize recent advances in mitigating the same. Finally, we provide an outlook on the possible routes forward for the field and propose new avenues to maximally exploit the excellent light-emitting capabilities of this family of semiconductors.

scholarly journals Enhanced Weak-Value Amplification via Photon Recycling

2021 ◽  
Vol 126 (22) ◽  
Author(s):  
Courtney Krafczyk ◽  
Andrew N. Jordan ◽  
Michael E. Goggin ◽  
Paul G. Kwiat
Keyword(s):  
Weak Value ◽  
Photon Recycling ◽  
Weak Value Amplification

Directional Modulation of Exciton Emission Using Single Dielectric Nanospheres

2021 ◽  
pp. 2007236
Author(s):  
Jie Fang ◽  
Mingsong Wang ◽  
Kan Yao ◽  
Tianyi Zhang ◽  
Alex Krasnok ◽  
...  
Keyword(s):  
Exciton Emission ◽  
Directional Modulation

scholarly journals Intense Dark Exciton Emission from Strongly Quantum-Confined CsPbBr3 Nanocrystals

Nano Letters ◽  
2020 ◽  
Vol 20 (10) ◽  
pp. 7321-7326
Author(s):  
Daniel Rossi ◽  
Xiaohan Liu ◽  
Yangjin Lee ◽  
Mohit Khurana ◽  
Joseph Puthenpurayil ◽  
...  
Keyword(s):  
Exciton Emission ◽  
Quantum Confined ◽  
Dark Exciton

Anthracene fluorescence at low temperatures. I. Purified single crystals

1972 ◽  
Vol 25 (7) ◽  
pp. 1411 ◽  
Author(s):  
LE Lyons ◽  
LJ Warren
Keyword(s):  
Low Temperature ◽  
Single Crystals ◽  
Fluorescence Spectrum ◽  
Low Temperatures ◽  
Free Exciton ◽  
Deformation Bands ◽  
Exciton Emission ◽  
Polarized Emission ◽  
Impurity Bands ◽  
Phonon Structure

The low-temperature fluorescence spectrum of purified vapour-grown anthracene single crystals is presented and the free-exciton emission distinguished from a number of defect or impurity bands present even in the purest crystals. In assigning the observed bands the symmetry of the active vibrations and the origin of background fluorescence and deformation bands are discussed. The phonon structure in the region of the fluorescence origin was found to be almost completely b-polarized. Emission of electronic origin (25103 cm-1) was too weak to be observed. Polarization ratios of the principal vibronio bands at 5.6 K are given.

Surface localized exciton emission from undoped SnO2 nanocrystal films

2010 ◽  
Vol 97 (22) ◽  
pp. 221105 ◽  
Author(s):  
S. S. Pan ◽  
Y. H. Tian ◽  
Y. Y. Luo ◽  
Y. X. Zhang ◽  
S. Wang ◽  
...  
Keyword(s):  
Exciton Emission ◽  
Undoped Sno2 ◽  
Nanocrystal Films

Exciton emission in PTCDA thin films under uniaxial pressure

2008 ◽  
Vol 77 (11) ◽  
Author(s):  
V. R. Gangilenka ◽  
A. DeSilva ◽  
H. P. Wagner ◽  
R. E. Tallman ◽  
B. A. Weinstein ◽  
...  
Keyword(s):  
Thin Films ◽  
Uniaxial Pressure ◽  
Exciton Emission
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