Journal ArticleDOI
Exciton quenching by diffusion of 2,3,5,6-tetrafluoro-7,7',8,8'-tetra cyano quino dimethane and its consequences on joule heating and lifetime of organic light-emitting diodes.
Priyanka Tyagi,Arunandan Kumar,Lalat Indu Giri,Manas Kumar Dalai,Suneet Tuli,Modeeparampil N. Kamalasanan,Ritu Srivastava +6 more
Reads0
Chats0
TLDR
The effect of F(4)-TCNQ insertion at the anode/hole transport layer (HTL) interface was studied on joule heating and the lifetime of organic light-emitting diodes (OLEDs).Abstract:
In this Letter, the effect of F4-TCNQ insertion at the anode/hole transport layer (HTL) interface was studied on joule heating and the lifetime of organic light-emitting diodes (OLEDs). Joule heating was found to reduce significantly (pixel temperature decrease by about 10 K at a current density of 40 mA/cm2) by this insertion. However, the lifetime was found to reduce significantly with a 1 nm thick F4-TCNQ layer, and it improved by increasing the thickness of this layer. Thermal diffusion of F4-TCNQ into HTL leads to F4-TCNQ ionization by charge transfer, and drift of these molecules into the emissive layer caused faster degradation of the OLEDs. This drift was found to reduce with an increase in the thickness of F4-TCNQ.read more
Citations
More filters
Journal ArticleDOI
Degradation Mechanisms and Reactions in Organic Light-Emitting Devices.
Journal ArticleDOI
Approaches for Long Lifetime Organic Light Emitting Diodes.
Sujith Sudheendran Swayamprabha,Deepak Kumar Dubey,Shahnawaz,Rohit Ashok Kumar Yadav,Mangey Ram Nagar,Aayushi Sharma,Fu-Ching Tung,Jwo-Huei Jou +7 more
TL;DR: The theme of this report, summarizing the knowledge of mechanisms allied with OLED degradation, would be contributory in developing better‐quality OLED materials and, accordingly, longer lifespan devices.
Journal ArticleDOI
Phosphine oxide functionalized pyrenes as efficient blue light emitting multifunctional materials for organic light emitting diodes
Godumala Mallesham,Chidirala Swetha,Surukonti Niveditha,Maneesha Esther Mohanty,Nanubolu Jagadeesh Babu,Arunandan Kumar,Kotamarthi Bhanuprakash,Vaidya Jayathirtha Rao +7 more
TL;DR: In this paper, the electron transport enhancing diphenyl phosphine-oxide (Ph2PO) group has been added to blue light emitting pyrene derivatives to obtain highly efficient electron transporting blue-emitters for non-doped organic light emitting devices (OLEDs) with good film formation characteristics.
Journal ArticleDOI
Diphenanthroline Electron Transport Materials for the Efficient Charge Generation Unit in Tandem Organic Light-Emitting Diodes
Gyeong Woo Kim,Young Hoon Son,Hye In Yang,Jin Hwan Park,Ik Jang Ko,Raju Lampande,Jeonghun Sakong,Min-Jae Maeng,Jong-Am Hong,Ju Young Lee,Yongsup Park,Jang Hyuk Kwon +11 more
TL;DR: In this article, the authors reported two new phenanthroline-based compounds, 1,4-bis(2-phenyl-1,10-phenanthrolin-4-yl)benzene (p-bPPhenB) and 1,3-bis (2-PNyl- 1,10phenanthuslin- 4-yl), for the charge generation unit of tandem organic light-emitting diodes (OLEDs).
Journal ArticleDOI
Photophysical and electroluminescence properties of bis(2′,6′-difluoro-2,3′-bipyridinato-N,C4′)iridium(picolinate) complexes: effect of electron-withdrawing and electron-donating group substituents at the 4′ position of the pyridyl moiety of the cyclometalated ligand
K. S. Bejoymohandas,K. S. Bejoymohandas,Arunandan Kumar,Sunil Varughese,E. Varathan,V. Subramanian,M. L. P. Reddy,M. L. P. Reddy +7 more
TL;DR: In this article, a series of 2′,6′-difluoro-2,3′-bipyridine cyclometalating ligands were synthesized by substituting electron-withdrawing (CHO, CF3, and CN) and electron-donating (OMe and NMe2) groups at the 4′ position of the pyridyl moiety and utilized them for the construction of five new iridium(III) complexes.
References
More filters
Journal ArticleDOI
White electroluminescence from stacked organic light emitting diode
Priyanka Tyagi,Ritu Srivastava,Arunandan Kumar,Virendra Kumar Rai,Rakhi Grover,Modeeparampil N. Kamalasanan +5 more
TL;DR: In this paper, a model has been presented for simulating the electroluminescence (EL) spectrum of stacked organic light emitting diode (OLED) based on Gaussian disorder model using Monte-Carlo technique.
Journal ArticleDOI
Highly Efficient Simplified Organic Light-Emitting Diodes Utilizing F4-TCNQ as an Anode Buffer Layer
Mu-Sen Dong,Mu-Sen Dong,Xiao-Ming Wu,Xiao-Ming Wu,Yulin Hua,Yulin Hua,Qing-Jin Qi,Qing-Jin Qi,Shougen Yin,Shougen Yin +9 more
TL;DR: In this article, the authors demonstrate that the electroluminescent performances of organic light-emitting diodes (OLEDs) are significantly improved by evaporating a thin F4-TCNQ film as an anode buffer layer on the ITO anode.
Journal ArticleDOI
Temperature measurements of a phosphorescent organic light-emitting diode by Raman spectroscopy
Hiroya Tsuji,Yukio Furukawa +1 more
TL;DR: In this article, the Raman spectrum of an operating phosphorescent organic light-emitting diode fabricated with bis(2′-benzothienyl)-pyridinato-N,C 3′ )iridium(acetylacetonate) (Btp 2 Ir(acac)) as a phosphorescent emitter with excitation at 532nm was observed.
Journal ArticleDOI
Modeling the sequential electric field assisted diffusion into glass of two ion species
TL;DR: In this paper, the sequential electric field assisted diffusion of two ion species into glass is modeled using standard assumptions, two coupled nonlinear drift-diffusion equations are derived for the ion concentration distributions.
Journal ArticleDOI
Field-assisted diffusion of K+, Rb+, Cs+, Ag+, and Tl+ ions in sodium silicate glass
TL;DR: In this article, the composition of the diffusion zone formed during the interaction between 20Na2O · 80SiO2 glass and molten silver, rubidium, cesium, and thallium nitrates with and without imposition of a constant electric field was determined using X-ray microanalysis.