Highly Air‐Stable Electron‐Transport Material for Ink‐Jet‐Printed OLEDs

Wei, Changting; Zhuang, Jinyong; Chen, Yali; Zhang, Dongyu; Su, Wenming; Cui, Zheng

doi:10.1002/chem.201603994

Cited by 31 publications

(32 citation statements)

References 54 publications

(120 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, the performances of these devices were unsatisfactory, and there was a great challenge to find a suitable orthogonal solvent without coffee ring pattern or pinhole during inkjet printing. Crosslinking technology, which seems to be a feasible way to fabricate such multilayer structures since it starts with a soluble precursor and then provides insoluble layers with no solvent restrictions, has been successfully used in multilayer solution‐processed optoelectronic and electronic devices …”

Section: Methodsmentioning

confidence: 99%

Inkjet‐Printed High‐Efficiency Multilayer QLEDs Based on a Novel Crosslinkable Small‐Molecule Hole Transport Material

Xie

Xiong

Chang

et al. 2019

Small

Self Cite

View full text Add to dashboard Cite

Quantum dots light‐emitting diodes (QLEDs) have attracted much interest owing to their compatibility with low‐cost inkjet printing technology and potential for use in large‐area full‐color pixelated display. However, it is challenging to fabricate high efficiency inkjet‐printed QLEDs because of the coffee ring effects and inferior resistance to solvents from the underlying polymer film during the inkjet printing process. In this study, a novel crosslinkable hole transport material, 4,4′‐bis(3‐vinyl‐9H‐carbazol‐9‐yl)‐1,1′‐biphenyl (CBP‐V) which is small‐molecule based, is synthesized and investigated for inkjet printing of QLEDs. The resulting CBP‐V film after thermal curing exhibits excellent solvent resistance properties without any initiators. An added advantage is that the crosslinked CBP‐V film has a sufficiently low highest occupied molecular orbital energy level (≈−6.2 eV), high film compactness, and high hole mobility, which can thus promote the hole injection into quantum dots (QDs) and improve the charge carrier balance within the QD emitting layers. A red QLED is successfully fabricated by inkjet printing a CBP‐V and QDs bilayer. Maximum external quantum efficiency of 11.6% is achieved, which is 92% of a reference spin‐coated QLED (12.6%). This is the first report of such high‐efficiency inkjet‐printed multilayer QLEDs and demonstrates a unique and effective approach to inkjet printing fabrication of high‐performance QLEDs.

show abstract

Section: Methodsmentioning

confidence: 99%

Inkjet‐Printed High‐Efficiency Multilayer QLEDs Based on a Novel Crosslinkable Small‐Molecule Hole Transport Material

Xie

Xiong

Chang

et al. 2019

Small

Self Cite

View full text Add to dashboard Cite

show abstract

“…6,[19][20][21] Generally, the mobility and threshold voltage of low temperature polysilicon thin film transistors (LTPS-TFTs) are non-uniform, and uniformity compensation within the driver circuitry is required. 6,22 Most solutions aim to increase the number of TFTs in each pixel, which significantly reduces the aperture ratio of traditional bottom-emitting OLEDs (BE-OLEDs), forcing OLEDs to operate at higher brightness levels, thus shortening the lifespan. 23,24 Fortunately, top-emitting organic lightemitting diodes (TE-OLEDs) are structurally unaffected by the number of TFTs integrated on the substrate because light emits from the top.…”

Section: Introductionmentioning

confidence: 99%

Very bright and efficient ITO-free narrow-spectrum micro-cavity top-emitting organic light-emitting diodes with low operation voltage

Liu

Chen

et al. 2022

J. Mater. Chem. C

View full text Add to dashboard Cite

show abstract

“…Additionally, conventional lithography and screen printing techniques are complicated and stereotyped for their demand of masks. Because of its low cost and simple procedure, inkjet printing is considered to be an ideal choice and has been used in fabricating an extensive range of flexible electronics, such as circuits, sensors, thin‐film transistors, solar cells, and supercapacitors . Furthermore, with the development of inkjet printing technology, inkjet equipment in the industry can print at speeds of over 100 m min −1 , which is enough for the needs of large‐scale production.…”

Section: Introductionmentioning

confidence: 99%

Flexible RFID Tag Metal Antenna on Paper‐Based Substrate by Inkjet Printing Technology

Wang

Yan

Cheng

et al. 2019

Adv Funct Materials

121

View full text Add to dashboard Cite

A reliable and low-cost solution-processing procedure to synthesize a highly adhesive flexible metal antenna with low resistivity for radio-frequency identification device (RFID) tags on paper substrates via inkjet printing combined with surface modification and electroless deposition (ELD) is demonstrated in this paper. Through the surface modification of colloidal solution of hydrolyzed stannous chloride and chitosan solution, the paper-based substrate is able to reduce the penetration rate of ink and further increase the adsorption amount of silver ions, which could create a catalytic activating layer to catalyze the subsequent ELD of a conductive deposited metal antenna. The resulting metal antenna for RFID tags presents good adhesive strength and low resistivity of 2.58 × 10 −8 Ω·m after 40 min of ELD, and maintains a reliable reading range of RFID tags even after over 1000 times of bending and mechanical stress. Consequently, the developed technology proposed allows for cheap, efficient, and massive production of metal antenna for paper-based RFID tags with excellent mechanical and electrical properties. Furthermore, this process is especially advantageous for the fabrication of next-generation flexible electronic devices based on paper substrates.The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adfm.201902579.identification technology in IOT. [2] Different kinds of substrates have been applied to fabricate RFID tags, including polyethylene terephthalate, [3][4][5] polyethylene naphthalate, [6][7][8] polyimide (PI), [9][10][11] and paper. [12,13] Paper is not only widely available, inexpensive, and well established but also lightweight, biodegradable, and can be creased for storage in small spaces or made into 3D self-standing structures; [14,15] so it is an ideal flexible substrate for RFID tags. Using paper as an insulating substrate, it is possible to fabricate RFID tags i) that do not need extra coarsening process because of enough surface roughness; [16] ii) that can naturally degrade; [17] iii) that is an abundantly available renewable material; [18] iv) that involves little absorption of electromagnetic energy due to its low dielectric constant and loss tangent angle. [19][20][21][22] Commercial paper-based RFID tags comprise metal antenna, integrated circuit (IC), and paper substrate, of which metal antenna accounts for 80% of the whole tag cost. [23] At present, the most mature method for preparing metal antenna RFID tag based on organic plastic substrate in industry is the subtractive etching method. [24] Although this traditional method of manufacturing metal antenna shows some superior characteristics, including high accuracy, low resistivity, and good weather resistance, it does generate some disadvantages such as high cost, restriction about substrate type, and environmental pollution. [20,25] In addition, the damage to fiber structure in paper substrate cannot be avoided due to the oxidation of fiber by the strong acid etching s...

show abstract

Highly Air‐Stable Electron‐Transport Material for Ink‐Jet‐Printed OLEDs

Cited by 31 publications

References 54 publications

Inkjet‐Printed High‐Efficiency Multilayer QLEDs Based on a Novel Crosslinkable Small‐Molecule Hole Transport Material

Inkjet‐Printed High‐Efficiency Multilayer QLEDs Based on a Novel Crosslinkable Small‐Molecule Hole Transport Material

Very bright and efficient ITO-free narrow-spectrum micro-cavity top-emitting organic light-emitting diodes with low operation voltage

Flexible RFID Tag Metal Antenna on Paper‐Based Substrate by Inkjet Printing Technology

Contact Info

Product

Resources

About