Small Molecules in Ink Jet Printed OLEDs—History, Status, and Prospects

Meyer, Sebastian; Hamburger, Manuel; Stolz, Sebastian; Engel, Miriam; Hayer, Anna; Tseng, Hsin‐Rong; Linge, Rouven; Anemian, Rémi

doi:10.1007/978-981-33-6582-7_3

Cited by 2 publications

(3 citation statements)

References 9 publications

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“…However, an increase in the concentration of a small‐molecule emitting material (usually ≤1 kg mol −1 ) has little effect on the ink viscosity. [ 7 ] Furthermore, small‐molecule light‐emitting materials suffer from recrystallization and low solubility compared to their polymeric counterparts. [ 8 ]…”

Section: Introductionmentioning

confidence: 99%

“…However, an increase in the concentration of a small-molecule emitting material (usually ≤1 kg mol −1 ) has little effect on the ink viscosity. [7] Furthermore, small-molecule light-emitting materials suffer from recrystallization and low solubility compared to their polymeric counterparts. [8] It is beneficial to incorporate a host material into the emissive layer to facilitate efficient exciton generation (electron-hole pairing) and radiative decay in both phosphorescent and TADF OLEDs.…”

Section: Introductionmentioning

confidence: 99%

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Inkjet‐Printed Self‐Hosted TADF Polymer Light‐Emitting Diodes

Cole

Kunz

Shaw

et al. 2022

Adv Materials Technologies

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Thermally activated delayed fluorescent (TADF) materials are extensively investigated as organic light‐emitting diodes (OLEDs) with TADF emitting layers demonstrating high efficiency without the use of heavy metal complexes. Therefore, solution‐processable and printable TADF emitters are highly desirable, moving away from expensive vacuum deposition techniques. In addition, using emissive materials not requiring an external host simplifies the fabrication process significantly. Herein, OLEDs using a solution‐processable TADF polymer that do not need an external host are introduced. The non‐conjugated TADF polymer features a TADF emitter (4‐(9H‐carbazol‐9‐yl)‐2‐(3′‐hydroxy‐[1,1′‐biphenyl]‐3‐yl)‐isoindoline‐1,3‐dione) as a side chain, as well as a hole‐transporting side chain and an electron‐transporting side chain on an inactive polymer backbone. All organic layers of the OLEDs are fabricated using solution processing methods. The OLEDs with inkjet‐printed emissive layers have comparable maximum current and external quantum efficiency as their spin‐coated counterparts, exceeding luminance of 2000 cd m−2. The herein‐explored strategy is a viable route toward self‐hosted printable TADF OLEDs.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Inkjet‐Printed Self‐Hosted TADF Polymer Light‐Emitting Diodes

Cole

Kunz

Shaw

et al. 2022

Adv Materials Technologies

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“…Among materials that can be used as an organic layers, some are based on organic polymers [13][14][15][16][17][18] and others are based on small molecules. [19][20][21] In addition, these materials can be fluorescent or phosphorescent, such as the oxadiazoles used as emissive material for the first blue OLEDs, [22,23] distyryl arenes used as an emitter of blue light, [24,25] rubrene as a dye based on small molecules, [26,27] and chelate lanthanide complexes as phosphorescent small molecules. [28,29] The carbazole possesses an interesting chemical versatility due to the added functional groups on the nitrogen atom and its reactivity via positions 2 and 7 or 3 and 6.…”

Section: Introductionmentioning

confidence: 99%

Electronic structures and photophysical properties of carbazole‐ and thiophene‐based organic compounds used as hole‐injecting layer for organic light‐emitting diodes (OLEDs)

et al. 2022

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In this study, we have carried out a theoretical study on six organic compounds based on thiophene and carbazole, with the aim of using them as a hole-injecting layer of organic light-emitting diodes (OLEDs). In this study, we have tested two types of structures: D-π-D for MO1, MO2, MO3, and MO4 compounds and D-π-A for MO5 and MO6 compounds. The correlation structure-properties of these studied compounds have been proceeded and discussed by analyzing highest occupied molecular orbital (HOMO), lowest unoccupied molecular orbital (LUMO), energy gap, polarization effect, atom transition density matrix, absorption, and photoluminescence (PL). This theoretical study, based on density functional theory (DFT)/TPSSTPSS/aug-cc-pVQZ and the integral-equation-formalism polarizable continuum model/

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Small Molecules in Ink Jet Printed OLEDs—History, Status, and Prospects

Cited by 2 publications

References 9 publications

Inkjet‐Printed Self‐Hosted TADF Polymer Light‐Emitting Diodes

Inkjet‐Printed Self‐Hosted TADF Polymer Light‐Emitting Diodes

Electronic structures and photophysical properties of carbazole‐ and thiophene‐based organic compounds used as hole‐injecting layer for organic light‐emitting diodes (OLEDs)

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