scholarly journals A Full Vacuum Approach for the Fabrication of Hybrid White-Light-Emitting Thin Films and Wide-Range In Situ Tunable Luminescent Microcavities

2016 ◽  
Vol 4 (7) ◽  
pp. 1124-1131 ◽  
Author(s):  
Youssef Oulad-Zian ◽  
Juan Ramon Sanchez-Valencia ◽  
Manuel Oliva ◽  
Julian Parra-Barranco ◽  
Maria Alcaire ◽  
...  
Keyword(s):  
Thin Films ◽  
White Light ◽  
Light Emitting ◽  
Wide Range

scholarly journals White Light Emission: A Full Vacuum Approach for the Fabrication of Hybrid White-Light-Emitting Thin Films and Wide-Range In Situ Tunable Luminescent Microcavities (Advanced Optical Materials 7/2016)

2016 ◽  
Vol 4 (7) ◽  
pp. 1134-1134
Author(s):  
Youssef Oulad-Zian ◽  
Juan Ramon Sanchez-Valencia ◽  
Manuel Oliva ◽  
Julian Parra-Barranco ◽  
Maria Alcaire ◽  
...  
Keyword(s):  
Thin Films ◽  
White Light ◽  
Optical Materials ◽  
Light Emission ◽  
White Light Emission ◽  
Light Emitting ◽  
Wide Range

Low Driving Voltage of Organic Light-Emitting Diodes Using p-Doping Starburst Amine as Hole Transporter

2000 ◽  
Vol 660 ◽  
Author(s):  
Xiang Zhou ◽  
Andreas Nollau ◽  
Jan Blochwitz ◽  
Martin Pfeiffer ◽  
Torsten Fritz ◽  
...  
Keyword(s):  
Thin Films ◽  
Hole Concentration ◽  
Organic Light Emitting Diodes ◽  
Driving Voltage ◽  
Temperature Dependent ◽  
Light Emitting ◽  
Layer Sequence ◽  
Undoped Material ◽  
High Bulk

ABSTRACTWe investigate the electrical properties and the OLED application of controlledly doped amorphous hole transporters. Thin films of starburst amine, 4,4',4“-tris(N,N-diphenyl- amino) triphenylamine (TDATA), doped by a fully fluorinated form of tetracyano- quinodimethane (F4-TCNQ), are characterized in situ by temperature dependent conductivity and Seebeck measurements. The conductivity and hole concentration increase with dopant concentration and are many orders of magnitude higher than those of undoped material. OLED devices with the layer sequence ITO/TDATA(200 nm)/Alq3(65 nm)/LiF(1 nm)/Al were fabricated. The use of p-doped TDATA thin films with high bulk conductivity and hole concentration reduces the resistance of the devices and leads to a thinner space charge layer which facilitates injection of holes from the ITO anode.

scholarly journals Perovskite-molecule composite thin films for efficient and stable light-emitting diodes

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Heyong Wang ◽  
Felix Utama Kosasih ◽  
Hongling Yu ◽  
Guanhaojie Zheng ◽  
Jiangbin Zhang ◽  
...  
Keyword(s):  
Thin Films ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Degradation Mechanism ◽  
Deep Understanding ◽  
Significant Progress ◽  
High Quality ◽  
Composite Thin Films ◽  
Light Emitting

AbstractAlthough perovskite light-emitting diodes (PeLEDs) have recently experienced significant progress, there are only scattered reports of PeLEDs with both high efficiency and long operational stability, calling for additional strategies to address this challenge. Here, we develop perovskite-molecule composite thin films for efficient and stable PeLEDs. The perovskite-molecule composite thin films consist of in-situ formed high-quality perovskite nanocrystals embedded in the electron-transport molecular matrix, which controls nucleation process of perovskites, leading to PeLEDs with a peak external quantum efficiency of 17.3% and half-lifetime of approximately 100 h. In addition, we find that the device degradation mechanism at high driving voltages is different from that at low driving voltages. This work provides an effective strategy and deep understanding for achieving efficient and stable PeLEDs from both material and device perspectives.

Ex situ and In situ TEM study of the relaxation of thin films by the modified frank-read mechanism

1992 ◽  
Vol 50 (2) ◽  
pp. 1342-1343
Author(s):  
F.K. LeGoues
Keyword(s):  
Thin Films ◽  
Strain Relaxation ◽  
Lattice Parameter ◽  
Buffer Layers ◽  
Ex Situ ◽  
In Situ Tem ◽  
Wide Range ◽  
Strong Resemblance ◽  
Image Position

In recent papers, we have described a novel mechanism for strain relaxation of thin films. Because of its strong resemblance to the well known Frank-Read sources of dislocations, it was called the “Modified-Frank-Read” (MFR) mechanism. This process was first observed during the growth of compositionally graded SiGe/Si(001) thin films, where it results in dislocations pile-ups being injected deep into an initially perfect substrate, leaving the topmost part of the film relaxed and nominally defect free. This last observation opens the door to a wide range of electronic applications since it makes it possible to grow electronic grade buffer layers of arbitrary composition and lattice parameter.The exact mechanism of the reproduction of dislocations was identified through tilting experiment and analysis of several compositionally graded SiGe/Si(001) structures. These also provided the important parameters controlling this mode of strain relaxation. We thus demonstrated that the MFR mechanism corresponds to the multiplication of “corner dislocations” (dislocations whose line forms a 90° angle) by simultaneous glide on two (111) planes.

Organic Materials for Large Area Electronics

2008 ◽  
Vol 608 ◽  
pp. 159-179 ◽  
Author(s):  
Richard Friend
Keyword(s):  
Thin Films ◽  
Field Effect ◽  
Organic Materials ◽  
Field Effect Transistors ◽  
Semiconductor Devices ◽  
Large Area ◽  
Active Matrix ◽  
Semiconductor Physics ◽  
Light Emitting ◽  
Wide Range

Organic materials have been developed to operate as the active semiconductor in a wide range of semiconductor devices, including light-emitting diodes, LEDs, field-effect transistors, FETs, and photovoltaic diodes, PVs. The ability to process these materials as thin films over large areas makes possible a range of applications, currently in displays, as LEDs and as active matrix FET arrays, and solar cells. This article reviews developments in semiconductor physics of these materials and in their application in semiconductor devices

Gold nanoclusters with a wide range of fluorescence characteristics generated in situ in polymer thin films: potential gas sensing application

2017 ◽  
Vol 46 (46) ◽  
pp. 16236-16243 ◽  
Author(s):  
U. Divya Madhuri ◽  
T. P. Radhakrishnan
Keyword(s):  
Thin Films ◽  
Potential Application ◽  
Gas Sensing ◽  
Gold Nanoclusters ◽  
Emission Characteristics ◽  
Gas Detectors ◽  
Fluorescence Characteristics ◽  
Wide Range ◽  
Sensing Application

Gold nanoclusters with variable emission characteristics are generated in situ in polymer films by mild thermal annealing and their potential application as gas detectors is demonstrated.

scholarly journals White light emission of IFP-1 by in situ co-doping of the MOF pore system with Eu3+and Tb3+

2015 ◽  
Vol 3 (18) ◽  
pp. 4623-4631 ◽  
Author(s):  
Suvendu Sekhar Mondal ◽  
Karsten Behrens ◽  
Philipp R. Matthes ◽  
Fabian Schönfeld ◽  
Jörn Nitsch ◽  
...  
Keyword(s):  
White Light ◽  
Light Emission ◽  
White Light Emission ◽  
Lanthanide Ions ◽  
Pore System ◽  
Light Emitting ◽  
Co Doping

A three color white light emitting MOF with temperature and dopant dependent chromaticity is achieved by in situ co-doping of IFP-1 with lanthanide ions.

scholarly journals Encapsulation of Dyes in Luminescent Metal-Organic Frameworks for White Light Emitting Diodes

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2761
Author(s):  
Zhihong Sun ◽  
Aaqib Khurshid ◽  
Muhammad Sohail ◽  
Weidong Qiu ◽  
Derong Cao ◽  
...  
Keyword(s):  
White Light ◽  
High Efficiency ◽  
Light Emitting Diodes ◽  
Fluorescent Dyes ◽  
Metal Organic Frameworks ◽  
Great Promise ◽  
Light Emitting ◽  
Wide Range ◽  
Metal Organic ◽  
White Light Emitting Diodes

The development of white light emitting diodes (WLEDs) holds great promise for replacing traditional lighting devices due to high efficiency, low energy consumption and long lifetime. Metal–organic frameworks (MOFs) with a wide range of luminescent behaviors are ideal candidates to produce white light emission in the phosphor-converted WLEDs. Encapsulation of emissive organic dyes is a simple way to obtain luminescent MOFs. In this review, we summarize the recent progress on the design and constructions of dye encapsulated luminescent MOFs phosphors. Different strategies are highlighted where white light emitting phosphors were obtained by combining fluorescent dyes with metal ions and linkers.

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