Journal ArticleDOI
Improved performances of organic light-emitting diodes with metal oxide as anode buffer
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TLDR
In this article, a green organic light-emitting diodes (OLEDs) based on molybdenum oxide (MoO3) as a buffer layer on indium tin oxide (ITO) was demonstrated.Abstract:
We demonstrate extremely stable and highly efficient organic light-emitting diodes (OLEDs) based on molybdenum oxide (MoO3) as a buffer layer on indium tin oxide (ITO). The significant features of MoO3 as a buffer layer are that the OLEDs show low operational voltage, high electroluminescence (EL) efficiency and good stability in a wide range of MoO3 thickness. A green OLED with structure of ITO∕MoO3∕N,N′-di(naphthalene-1-yl)-N,N′-diphenyl-benzidene (NPB)∕NPB: tris(8-hydroxyquinoline) aluminum (Alq3):10-(2-benzothiazolyl)-2,3,6,7-tetrahydro-1,1,7,7-tetramethyl-1H, 5H, 11H-(1)-benzopyropyrano(6,7-8-i,j)quinolizin-11-one (C545T)∕Alq3∕LiF∕Al shows a long lifetime of over 50000h at 100cd∕m2 initial luminance, and the power efficiency reaches 15lm∕W. The turn-on voltage is 2.4V, and the operational voltage at 1000cd∕m2 luminance is only 6.9V. The significant enhancement of the EL performance is attributed to the improvement of hole injection and interface stability at anode.read more
Citations
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Journal ArticleDOI
Efficient planar heterojunction perovskite solar cells by vapour deposition
TL;DR: It is shown that perovskite absorbers can function at the highest efficiencies in simplified device architectures, without the need for complex nanostructures.
Journal ArticleDOI
Transition Metal Oxides for Organic Electronics: Energetics, Device Physics and Applications
TL;DR: An overview of TMO-based device architectures ranging from transparent OLEDs to tandem OPV cells is given, and various TMO film deposition methods are reviewed, addressing vacuum evaporation and recent approaches for solution-based processing.
Journal ArticleDOI
Role of the deep-lying electronic states of MoO3 in the enhancement of hole-injection in organic thin films
TL;DR: In this paper, the electron affinity and ionization energy of vacuum-deposited molybdenum trioxide (MoO3) and of a typical MoO3/hole transport material (HTM) interface were determined via ultraviolet and inverse photoelectron spectroscopy.
Journal ArticleDOI
An inverted organic solar cell employing a sol-gel derived ZnO electron selective layer and thermal evaporated MoO3 hole selective layer
TL;DR: In this article, the authors reported an efficient inverted bulk-heterojunction with a highly transparent sol-gel derived ZnO film as electron selective layer and MoO3 as hole selective layer.
References
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Journal ArticleDOI
Organic electroluminescent devices with improved stability
TL;DR: In this article, a stable organic electroluminescent devices based on vapor-deposited Alq thin films have been achieved, which are derived from several factors including: (1) a multilayer thin-film structure with a CuPc stabilized hole-injection contact, (2) a hole-transport diamine layer using a naphthyl substituted benzidine derivative, and (3) an ac drive wave form.
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Enhanced electron injection in organic electroluminescence devices using an Al/LiF electrode
TL;DR: In this article, an ultrathin LiF layer adjacent to an electron-transporting layer and an aluminum outerlayer was used as an electrode for organic electroluminescent devices.
Journal ArticleDOI
Surface modification of indium tin oxide by plasma treatment: An effective method to improve the efficiency, brightness, and reliability of organic light emitting devices
TL;DR: In this paper, an indium tin oxide anode contact to an organic light emitting device via oxygen plasma treatment was shown to improve the performance of single-layer doped-polymer devices.
Journal ArticleDOI
Metal oxides as a hole-injecting layer for an organic electroluminescent device
TL;DR: In this article, a hole-injecting layer for an organic electroluminescent (EL) device consisting of N,N'-diphenyl-N,N-bis(3-methylphenyl1)1,1'-biphensyl-4,4' diamine (TPD) and tris-(8-quinolinolato) aluminium (Alq) was presented.
Journal ArticleDOI
High operational stability of electrophosphorescent devices
Raymond Kwong,Matthew R. Nugent,Lech Michalski,Tan Ngo,Kamala Rajan,Yeh-Jiun Tung,Michael S. Weaver,Theodore X. Zhou,Michael Hack,Mark E. Thompson,Stephen R. Forrest,Julie J. Brown +11 more
TL;DR: In this paper, the authors presented an efficient electrophosphorescent device with factris(2-phenylpyridine)iridium as green emitting green emitting dopant with a variety of hole and exciton blocking materials, achieving an efficiency of 17.6 cd/A with a projected operational lifetime of 5000 h at an initial brightness of 300 cd/m2.