Super‐high‐resolution transfer printing for full‐color OLED display patterning

Jin, Hongzheng; Sturm, James C.

doi:10.1889/jsid18.2.141

Cited by 15 publications

(12 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In solution processing, a good contact between the mask and substrate is needed to ensure good pattern definition. Polydimethylsiloxane (PDMS) has been shown to provide firm contact directly with organic layers without damage . PDMS prevents unwanted ink reflow after deposition, and leaves no residue when it is removed.…”

Section: Resultsmentioning

confidence: 99%

“…The hydrophobic banks are formed via subtractive methods, which requires high baking temperature and etching processes that are undesirable for the OLED materials and adds complexity to the fabrication process. Dry contact printing, also known as transfer printing method has been used in the fabrication of OLEDs using OP and by transferring the organic layer with desired patterns directly onto unpatterned electrodes . The fabrication of a template used in stamp molding usually requires subtractive methods, the donor films are either vacuum‐deposited or spin‐coated, and the compatibility of this method with large area roll‐to‐roll production is still in question.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Emission Area Patterning of Organic Light‐Emitting Diodes (OLEDs) via Printed Dielectrics

Han

Khan

Gopalan

et al. 2018

Adv Funct Materials

View full text Add to dashboard Cite

Solution-processibility is one of the distinguished traits of organic lightemitting diodes (OLEDs) compared to existing solid-state LED technologies. It allows new opportunities which can simplify the fabrication and potentially reduce the cost of manufacturing process. Emission area patterning is one of the crucial fabrication steps and it usually involves subtractive methods, such as photolithography or etching. Here, printing techniques are used to pattern the emission area of blade-coated OLED layers. The print qualities of a number of printing schemes are characterized and compared. Spray coating and screen printing are used to deposit dielectrics with desired patterns on the OLED layers. At luminance of 1000 cd m −2 the OLEDs patterned using spray-coated and screen-printed dielectric show current density of 8.2 and 10.1 mA cm −2 , external quantum efficiency (EQE) of 2.1% and 2.1%, and luminous efficacy of 5.5 and 6.3 lm W −1 , respectively. The OLED characteristics and features of each printing scheme in depositing the dielectric layer are discussed. The printing methods are further applied to demonstrate displays with complex shapes and a seven-segment display.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Emission Area Patterning of Organic Light‐Emitting Diodes (OLEDs) via Printed Dielectrics

Han

Khan

Gopalan

et al. 2018

Adv Funct Materials

View full text Add to dashboard Cite

show abstract

“…With organic or polymeric LEDs (OLEDs), transfer printing provides a means for patterning organic active layers into microscale pixels or constructing multilayered assemblies of different organic materials, where shadow mask deposition or conventional solution‐based processes such as photolithography and spin‐coating are not applicable due to the limited scalability and pixel resolution, incompatibility of the materials with the processing conditions (e.g., temperature, solvents, developers), or poor control of materials interfaces . In one example, multilayers of organic active materials with aluminium cathodes deposited directly on a poly(urethane‐acrylate) stamp pre‐treated with a 20 nm‐thick layer of fluorinated ethylene propylene (FEP) to reduce the adhesion can be transferred through successive printing operations to form red, green, and blue emitting layers for multi‐color pixels in microscale layouts .…”

Section: Light‐emitting Devicesmentioning

confidence: 99%

Heterogeneously Integrated Optoelectronic Devices Enabled by Micro‐Transfer Printing

Yoon

Lee

Kang

et al. 2015

Advanced Optical Materials

135

View full text Add to dashboard Cite

Transfer printing is a materials assembly technique that uses elastomeric stamps for heterogeneous integration of various classes of micro‐ and nanostructured materials into two‐ and three‐dimensionally organized layouts on virtually any type of substrate. Work over the past decade demonstrates that the capabilities of this approach create opportunities for a wide range of device platforms, including component‐ and system‐level embodiments in unusual optoelectronic technologies with characteristics that cannot be replicated easily using conventional manufacturing or growth techniques. This review presents recent progress in functional materials and advanced transfer printing methods, with a focus on active components that emit, absorb, and/or transport light, ranging from solar cells to light‐emitting diodes, lasers, photodetectors, and integrated collections of these in functional systems, where the key ideas provide unique solutions that address limitations in performance and/or functionality associated with traditional technologies. High‐concentration photovoltaic modules based on multijunction, micro‐ and millimeter‐scale solar cells and high‐resolution emissive displays based on microscale inorganic light‐emitting diodes provide examples of some of the most sophisticated systems, geared toward commercialization.

show abstract

“…Each R, G, and B metal‐organic multilayer stacked OLED was repeatedly transferred on glass coated with ITO to complete the fabrication of the full‐color display . Moreover, this process was used to print RGB subpixel arrays with a pattern size of 12 µm at a resolution of 530 ppi …”

Section: Heterogeneous Patterning Of Organic Materialsmentioning

confidence: 99%

Heterogeneous Monolithic Integration of Single‐Crystal Organic Materials

et al. 2016

View full text Add to dashboard Cite

Manufacturing high-performance organic electronic circuits requires the effective heterogeneous integration of different nanoscale organic materials with uniform morphology and high crystallinity in a desired arrangement. In particular, the development of high-performance organic electronic and optoelectronic devices relies on high-quality single crystals that show optimal intrinsic charge-transport properties and electrical performance. Moreover, the heterogeneous integration of organic materials on a single substrate in a monolithic way is highly demanded for the production of fundamental organic electronic components as well as complex integrated circuits. Many of the various methods that have been designed to pattern multiple heterogeneous organic materials on a substrate and the heterogeneous integration of organic single crystals with their crystal growth are described here. Critical issues that have been encountered in the development of high-performance organic integrated electronics are also addressed.

show abstract

Super‐high‐resolution transfer printing for full‐color OLED display patterning

Cited by 15 publications

References 12 publications

Emission Area Patterning of Organic Light‐Emitting Diodes (OLEDs) via Printed Dielectrics

Emission Area Patterning of Organic Light‐Emitting Diodes (OLEDs) via Printed Dielectrics

Heterogeneously Integrated Optoelectronic Devices Enabled by Micro‐Transfer Printing

Heterogeneous Monolithic Integration of Single‐Crystal Organic Materials

Contact Info

Product

Resources

About