Non-doped Emissive Layer Research Articles

Deep blue high-efficiency solution-processed triplet-triplet annihilation organic light-emitting diodes using bis(8-carbazol-N-yl)fluorene- and benzonitrile-modified anthracene/chrysene fluorescent emitters

Triplet-triplet annihilation (TTA) emitters can effectively utilize non-radiative triplet excitons through the interaction of low triplet energy excitons to produce high energy singlet excitons, but they are mostly restricted by their multilayered device structure fabricated using layer-by-layer thermal vacuum evaporation. It is a great challenge to develop, for the first time, efficient solution-processed non-doped TTA organic light-emitting diodes (OLEDs). In this study, two solution-processable blue emissive TTA molecules (FAnCN and FCsCN) bearing (anthracen-9-yl)benzonitrile (AnCN) and (chrysen-6-yl)benzonitrile (CsCN) as TTA emissive cores modified with 9,9′-bis(8-(carbazole-N-yl)octyl)fluorene (F) are designed and synthesized, respectively. The experimental and theoretical studies reveal that both molecules exhibit deep blue emissions, amorphous morphology with good thermal stability, high-quality solution-cast thin films, decent hole mobility, high-lying HOMO levels (∼-5.45 eV), and suitable lowest singlet (S1)/triplet (T1) excited states (2T1 > S1) for TTA process. FAnCN and FCsCN are successfully employed as solution-processed non-doped emissive layers (EML) in simple structured TTA OLEDs. These devices show intense blue emissions, low turn-on voltages (∼3.6 V), excellent electroluminescent (EL) performances (EQEmax = 5.47–6.84 % and LEmax = 5.66–5.83 cd/A), and TTA characteristics. Especially, FCsCN-based TTA OLED emits deep blue EL emission peaked at 435 nm with a high EQEmax of 6.84 %. This work not only presents a new strategic design for the preparation of solution-processable TTA emitter, but also further ratifies that the TTA mechanism can also be applicable in solution-processed OLEDs.

Anthracene derivatives with electron-transport units for non-doped blue fluorescent organic light-emitting diodes

Blue organic light-emitting diodes with non-doped emissive layer (EML) structures have been garnered increasing interest due to their convenience of manufacturing process. For this purpose, we designed and synthesized two novel anthracene derivatives, PO2PhAnTz and PO2PhAnBI. Both derivatives exhibited bright blue electroluminescence emission and a relatively low operating voltage with a simple bilayer device structure. The PO2PhAnBI with triphenyl-phosphine oxide moiety as host, anthracene core as dopant and benzimidazole as electron transport group, realized a balanced bipolar transport and attained a maximum external quantum efficiency of 5.74 %. The findings shed light on the molecule design role toward high-efficiency non-doped blue OLEDs.

Oligocarbazole modified hybridized local and charge transfer emitters for efficient solution-processed deep blue organic light-emitting diodes

Herein, two new blue solution-processable hybridized local and charge transfer (HLCT) fluorophores (pCTPI and mCTPI) were designed and synthesized by incorporating oligocarbazole fragment into the HLCT luminogenic triphenylamine-phenanthroimidazole (TPI) molecule. Their HLCT and photoluminescence properties were experimentally and theoretically probed by the solvation effect and density functional theory calculations. These materials exhibited an intense blue emission (440 nm) with a good solution-processed film-forming quality and decent hole mobility (3.98–4.55 × 10−6 cm2 V−1s−1), resulting in a successful utilization as non-doped emissive layers in simple solution-processed organic light-emitting diodes (OLEDs). The devices showed deep blue emission (430 nm) with excellent electroluminescence (EL) performance and narrow EL emission as compared to the TPI-based device. Notably, pCTPI-based solution-processed OLED achieved a luminance of 4938 cd m−2 and an external quantum efficiency of 6.35 %.

High solid-state fluorescent 9,9-bis(4-(diphenylamino) phenyl)fluorene-pyrenes as hole-transporting-free blue emitters for efficient solution-processed electroluminescent devices

The development of light-emitting conjugated materials (LEMs) with multiple functions not only improves photo and electronic properties to attain efficient and robust device electroluminescence (EL) performance, but also enhances the film-forming ability to manufacture large-area film via solution processing technology. Herein, new multi-functional blue LEMs (PY1 and PY2) bearing either 9,9-bis(4-diphenylaminophenyl)fluorene or 7,9,9-tris(4-diphenylaminophenyl)fluorene substituted at 1,3,6,8-positions of pyrene were designed, synthesized, and characterized as solution-processable hole-transporting-free blue emitters for simple structured solution-processed organic light-emitting diodes (OLEDs). Both molecules adopted highly bulky molecular structures. They exhibited good quality thin films by spin-coating, stable blue emissions with high fluorescence emission efficiencies (64–71%), shallow HOMO levels (−5.31 to −5.38 eV), decent hole mobilities (2.31–5.05 x 10−6 cm2 V−1s−1), and high thermal stability, and effectively applied as non-doped emissive layers in the OLEDs. Especially, PY2-based OLED showed a bright blue emission with superior EL performance (brightness of 26415 cd m−2, turn-on voltage (Von) of 2.8 V, external quantum efficiency (EQEmax) of 4.19%, and luminance efficiency (LEmax) of 10.53 cd A−1). This outstanding EL performance of the non-doped solution-processed blue OLED could be ascribed to the effective molecular design, and this work presented a new strategy for constructing useful blue emitters based on pyrene.

The achievement of high-performance and allochroic organic light-emitting diodes via nondoped 4CzPN ultrathin emissive layer

The device fabrication process can be simplified by the employment of ultrathin nondoped emission layer (UT-EML). Based on 1,2,3,4-tetrakis(carbazol-9-yl)-5,6-dicyanobenzene (4CzPN) emitter, the influence of the thickness of ultrathin emissive layer on the device properties was systemically investigated. The high-performance nondoped device was fulfilled by utilizing a 0.02 nm ultrathin emissive layer. The nondoped device delivered the maximum efficiencies of 9.0%, 30.0 cd A−1, and 15.0 lm W−1, accompanied by the peak luminance of 30 597 cd m−2, whilst the corresponding properties of the doped device with a similar configuration were 7.4%/23.7 cd A−1/14.9 lm W−1, and 10 072 cd m−2. Moreover, the efficiency roll-off (just 1.5% from peak to the value at 5 000 cd m−2) of nondoped device was much superior to that of doped devices (46%). Besides, the color can be tuned by controlling the thickness of ultrathin emissive layer and applied voltage, exhibiting potential applications in the field of smart lighting and anti-counterfeiting. When the emission layer thickness was increased from 0.02 to 1.0 nm, the CIE coordinates of devices under 6 V shifted from (0.322, 0.603) to (0.436, 0.537). And the device with a 1.0-nm-thick emissive layer showed a ΔCIE of (0.056, 0.023) with the increase of bias voltage from 5 to 12 V. These results shed light on that nondoped ultrathin emission layer holds great potential for high performance and color-tunable TADF OLEDs.

Tuning photophysical properties of bicarbazole-based blue TADF emitters with AIE feature: Trade-off between small singlet-triplet energy splitting and high photoluminescence quantum yield

Three aggregation-induced emission (AIE) and thermally activated delayed fluorescence (TADF) blue light-emitting materials were successfully synthesized using bicarbazole and phenylsulfonyl/benzophenone moieties as electron donors and acceptors, respectively, via Buchwald-Hartwig reaction. Density functional theory calculations showed that the three emitters have a moderate dihedral angle between the two carbazole planes and between the donor and acceptor, resulting in a good conjugated structure and a trade-off between the small ΔEST and high photoluminescence quantum yield of the BCzDPM molecule. The cyclic voltammetry, thermogravimetric analysis and differential scanning calorimetry tests demonstrated that the three materials had high electrochemical and thermal stability. The three emitters exhibited obvious intramolecular charge transfer characteristics in solution and film. According to the fluorescence and low-temperature phosphorescence spectra, the lowest singlet and triplet excited state energy levels of BCzDPM were 2.96 eV and 2.78 eV, respectively, with a ΔEST of 0.18 eV. Using these emitters as non-doped emissive layers, efficient blue electroluminescent devices were fabricated. The maximum current efficiency and external quantum efficiency reached 15.4 cd/A and 7.05% for the BCzDPM device, respectively, and the efficiency roll-off of BCzDPM was smaller than that of PSOBCz and PBCzPM, under high current density.

Dual Hybridized Local and Charge Transfer Characteristic Fluorophore as an Efficient Nondoped Emitter for Electroluminescent Device

Hybridized local and charge transfer (HLCT) is an attractive strategy for achieving efficient electroluminescence (EL) in electrofluorescent devices by the conversion of triplet‐state (T) to singlet‐state (S) excitons via a reverse intersystem crossing, giving rise to a high exciton utilization efficiency exceeding the spin statistical limit. Excellent device performance is reached using thermally evaporated emissive layers. However, for potential large‐scale commercialization, it is crucial to attain comparable device performances using low‐cost solution‐processing techniques. Herein, a new concept of dual HLCT characteristic fluorophore (BCBF) with a high solid‐state fluorescence as a nondoped emitter for a simple structured solution‐processed EL device is presented. BCBF is effectively formulated by π‐conjugation linking two HLCT fragments with a highly soluble hole‐transporting aromatic moiety. Its dual HLCT and photoluminescence (PL) properties are experimentally and theoretically probed by the solvatochromic effect and density functional theory (DFT) calculations. The molecule exhibits an intense yellow–green emission with a good solution‐processed film‐forming quality and a high solid‐state fluorescence quantum yield of 80%. BCBF is successfully utilized as a nondoped emissive layer in a solution‐processed double‐layered organic light‐emitting diode (OLED), which shows excellent EL performance (brightness of 47 580 cd m−2, current efficiency of 15.78 cd A−1, and external quantum efficiency of 7.20%).

Intrinsic Hole Mobility in Luminescent Metal-Organic Frameworks and Its Application in Organic Light-Emitting Diodes.

Most metal-organic frameworks (MOFs) lack charge mobility, which is crucial for realizing their use in optoelectronic applications. This work proposes the design of a MOF using triarylamine-based ligands (Zr-NBP) as the lone pair electron spacer to enhance the hole mobility in the MOF while maintaining its luminescent properties. Zr-NBP has strong fluorescence with a good hole mobility of 1.05×10-6 cm2 V-1 s-1 , which is comparable to organic materials used in optoelectronic devices. We also employed a Zr-NBP nanofilm in the pure phase as both a non-doped emissive layer and a hole-transporting layer within organic light-emitting diodes (OLEDs). The obtained OLED device produced a bright green light with a low turn-on voltage of 3.9 V. This work presents an advance in developing the electronic properties of MOFs by modifying the chemical properties of its building blocks, and will likely inspire further design of MOF materials as active layers in optoelectronic devices.

Benzothiadiazole-based fluorophores as efficient non-doped emitters for solution-processed organic light-emitting diodes

New HLCT fluorophores are synthesized and successfully applied as non-doped emissive layers in solution-processed double-layered OLEDs. These devices exhibit intense yellow-green emission colors with superior performance.

Pyrene-Benzimidazole Derivatives as Novel Blue Emitters for OLEDs.

Three novel small organic heterocyclic compounds: 2-(1,2-diphenyl)-1H-benzimidazole-7-tert-butylpyrene (compound A), 1,3-di(1,2-diphenyl)-1H-benzimidazole-7-tert-butylpyrene (compound B), and 1,3,6,8-tetra(1,2-diphenyl)-1H-benzimidazolepyrene (compound C) were synthesized and characterized for possible applications as blue OLED emitters. The specific molecular design targeted decreasing intermolecular aggregation and disrupting crystallinity in the solid-state, in order to reduce dye aggregation, and thus obtain efficient pure blue photo- and electroluminescence. Accordingly, the new compounds displayed reasonably high spectral purity in both solution- and solid-states with average CIE coordinates of (0.160 ± 0.005, 0.029 ± 0.009) in solution and (0.152 ± 0.007, 0.126 ± 0.005) in solid-state. These compounds showed a systematic decrease in degree of crystallinity and intermolecular aggregation due to increasing steric hindrance, as revealed using powder X-ray diffraction analysis and spectroscopic studies. An organic light-emitting diode (OLED) prototype fabricated using compound B as the non-doped emissive layer displayed an external quantum efficiency (EQE) of 0.35 (±0.04)% and luminance 100 (±6) cd m−2 at 5.5 V with an essentially pure blue electroluminescence corresponding to CIE coordinates of (0.1482, 0.1300). The highest EQE observed from this OLED prototype was 4.3 (±0.3)% at 3.5 V, and the highest luminance of 290 (±10) cd m−2 at 7.5 V. These values were found comparable to characteristics of the best pure blue OLED devices based on simple fluorescent small-molecule organic chromophores.

21‐2: Invited Paper: Platinum(II) Based Near‐Infrared Phosphors for Efficient Organic Light‐Emitting Diodes with Peak Wavelength Beyond 800 nm

Near‐infrared (NIR) organic light emitting diodes (OLED has evolved to become the futuristic lighting technology due to its enormous potentials ranging from security identification and therapeutics. In this presentation, we elaborate the design and preparation of a series of Pt(II) based emitters, to which the exceedingly strong intermolecular Pt⋅⋅⋅Pt interaction fostered the metal‐metal‐to‐ligand charge transfer transition characteristics upon excitation in thin films and, thereby, gave efficient electroluminescence with peak wavelength around 800 nm and beyond. Consequently, NIR OLEDs based on these Pt(II) complexes were fabricated using direct vacuum deposition in forming the nondoped emissive layer. Moreover, the relevant device efficiencies are significantly better than all NIR OLEDs ever documented in literature.

Triphenylamine-carbazole alternating copolymers bearing thermally activated delayed fluorescent emitting and host pendant groups for solution-processable OLEDs

Thermally activated delayed fluorescent (TADF) polymers are suitable for solution-processed organic light-emitting diodes (OLEDs). However, so far, very few efficient TADF polymers have been reported, which severely limits their commercial application in display and lighting fields. Furthermore, most of the reported TADF polymers are synthesized by the polymerization of low-molecular-weight monomers, which may require complicated modification process or present high steric hindrance resulting in low-molecular-weight polymers. In this work, a series of yellow-green TADF polymeric emitters PTPA-mCP-PxzTrz-X (X = 10, 20, 30, or 40) were designed and synthesized by grafting TADF emitter phenoxazine-triphenyltriazine (PxzTrz) and host unit 1,3-bis(9H-carbazol9-yl)benzene (mCP) onto the pre-obtained triphenylamine-carbazole alternating copolymers. All polymers displayed good solubility and thermal stability. By employing PTPA-mCP-PxzTrz-40 as non-doped emissive layer, the device displayed a maximum luminance of 650.7 cd/m2 and a maximum current efficiency of 3.3 cd/A, which is promising for commercial application.

Simple-Structured OLEDs Incorporating Undoped Phosphorescent Emitters Within Non-Exciplex Forming Interfaces: Towards Ultraslow Efficiency Roll-Off and Low Driving Voltage for Indoor R/G/B Illumination.

To meet the requirement of indoor R/G/B monochrome illumination a simplified OLEDs structure and fabrication process must occur. Herein, a design philosophy of low efficiency roll-off and simple-structure OLEDs incorporating R/G/B phosphorescent ultrathin non-doped emissive layers (EMLs) within non-exciplex forming interfaces a luminescent system by a direct charge trapping mechanism has been reported, which uses bis(2-methyldibenzo[f,h]-quinoxaline)(acetylacetonate)iridium(III) (MDQ)2Ir(acac), bis(3-phenylpyridin-e)iridium(III) (Ir(ppy)3), and bis(3,5-difluoro-2 -(2-pyridyl)phenyl-(2-carboxypyridyl) iridiumII) (Firpic) as R/G/B luminescent dyes, respectively. Although the recombination zone is narrow in the designed OLEDs, the efficiency roll-off of the designed OLEDs are unexpectedly slow, due to stable charge trapping of the emitters and are refrained from concentration quenching in relatively low current density, but the luminance meets the requirement of indoor lighting. With a low threshold voltage of 2.9/2.9/3.5 V, the designed R/G/B phosphorescent OLEDs show an efficiency roll-off as low as 7.6/3.2/4.3% for indoor luminance from 10 cd/m2 to 1,000 cd/m2, respectively. The perspective of R/G/B luminescent dyes on luminous efficiency, chromaticity coordinate drifts, efficiency roll-off, and direct charge trapping has been thoroughly studied. Therefore, our research may help to further develop ideal indoor lighting using a simplified undoped R/G/B OLEDs structure with simultaneous ultraslow efficiency roll-off, low threshold voltage, simplified fabrication process, low reagent consumption, and cost.

Bipolar TADF interlayer for high performance hybrid WOLEDs with an ultrathin non-doped emissive layer architecture

Abstract White organic light-emitting diodes (WOLEDs) with non-doped construction have compelling advantages, such as simplifying manufacturing process and reducing costs, thus attracting more attention. To improve the efficiency of non-doped WOLEDs, the selection of suitable interlayer is still a big problem to balance carriers. Here, for the first time, we employed a thermally activated delayed fluorescence (TADF) material with bipolar transport characteristics as the interlayer to modulate the exciton distribution, and fabricated efficient and ultrathin non-doped devices. The optimized monochromatic and white OLED exhibited maximum external quantum efficiencies of 18.1% and 15.6%, current efficiencies of 55.7 cd/A and 46.6 cd/A, as well as power efficiencies of 43.8 lm/W and 41.8 lm/W, respectively. More importantly, the devices adopted an ultrathin non-doped emissive layer architecture, and its thickness was only 3.6 nm, which was beneficial to reduce costs and simplify preparation process. Our results illustrated a new strategy that the bipolar TADF interlayer can suppress triplet-triplet annihilation (TTA) effect and improve the exciton utilization, which presents unprecedented opportunities for fabricating highly efficient, low cost and commercial WOLEDs.

High Solid‐State Near Infrared Emissive Organic Fluorophores from Thiadiazole[3,4‐c]Pyridine Derivatives for Efficient Simple Solution‐Processed Nondoped Near Infrared OLEDs

AbstractMany efforts have been dedicated to developing near infrared (NIR) fluorescent emitters with strong emission especially in the range of 700–1000 nm due to their potential applications in biomedical and optoelectronic fields. However, high solid state NIR emission fluorophores are still rare for applications. Herein, two efficient donor‐π‐acceptor type NIR emitters, C3HTP and C4HTP, are designed and synthesized by end‐capping two isomeric bis(n‐hexylthienyl)thiadiazole[3,4‐c]pyridines as π‐acceptor with structural bulky, electron rich tercarbazole moiety. They exhibit excellent solid state NIR emission with an emission peak at 725 nm, especially C3HTP, reaching a record high photoluminescence quantum yield (ΦPL) of 34% for NIR organic fluorescent materials. By taking advantage of their ΦPL values in the film state (ΦPL = 10–34%), suitable energy levels (highest occupied molecular orbital (HOMO) level ≈ −5.3 eV), high hole mobility (5.49 × 10−8 cm2 V−1 s−1) as well as good amorphous film forming ability by solution casting, they are used to fabricate a nondoped emissive layer (EML) in simple double‐layer solution processed NIR electroluminescent (EL) devices. The device containing C3HTP as the EML shows a NIR emission peaking at 726 nm and excellent EL performance with a high external quantum efficiency of 1.51%, which is the best solution processed nondoped NIR organic light‐emitting diodes reported to date. Importantly, this represents an advance in near infrared organic fluorescent materials and EL devices that meet the requirements of many applications.

Meta-Substituted benzophenones as multifunctional electroactive materials for OLEDs

meta-Substituted benzophenones bearing tetrahydrocarbazole, phenoxazine and 2,7-ditert-butyl-9,9-dimethylacridine moieties were synthesized as materials exhibiting both thermally activated delayed fluorescence and aggregation induced emission enhancement. The derivatives showed improved HOMO and LUMO separation compared to that of the corresponding derivatives with para-linkage which lead to the minimized singlet-triplet energy gap of ca. 0.04 eV. By employing the acridan-substituted benzophenone derivative as non-doped emissive layer in OLED, a green device with external quantum efficiency of 1.93% was obtained with the CIE coordinates of (0.37, 0.57). More efficient triplet population employment was achieved after doping the acridan-substituted benzophenone derivative with red phosphorescent emitter bis(1-phenyl-isoquinoline)(acetylacetonate)Iridium(III). Red phosphorescent device exhibited small efficiency roll-off and a relatively high external quantum efficiency of 8.6%. External quantum efficiency of 7.60% was achieved for green device based on host:guest system using emitter 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-10H-phenoxazine which exhibited thermally activated delayed fluorescence.

Management of Exciton for Highly-Efficient Hybrid White Organic Light-Emitting Diodes with a Non-Doped Blue Emissive Layer.

Hybrid white organic light-emitting diodes (WOLEDs) have drawn great attention both for display and solid-state lighting purposes because of the combined advantages of desirable stability of fluorescent dyes and high efficiency of phosphorescent materials. However, in most WOLEDs, obtaining high efficiency often requires complex device structures. Herein, we achieved high-efficiency hybrid WOLEDs using a simple but efficacious structure, which included a non-doped blue emissive layer (EML) to separate the exciton recombination zone from the light emission region. After optimization of the device structure, the WOLEDs showed a maximum power efficiency (PE), current efficiency (CE), and external quantum efficiency (EQE) of 82.3 lm/W, 70.0 cd/A, and 22.2%, respectively. Our results presented here provided a new option for promoting simple-structure hybrid WOLEDs with superior performance.

Comparative study of multi-functional luminogens with 1,3,5-triazine as the core and phenothiazine or phenoxy donors as the peripheral moieties for non-doped/doped fluorescent and red phosphorescent OLEDs

A series of three-armed fluorescent emitters based on a 1,3,5-triazine acceptor as the central core and phenothiazine or phenoxy moieties as the different peripheral units, are designed and synthesized. All of them exhibit aggregation-induced emission enhancement and thermally activated delayed fluorescence. Photoluminescence quantum yields exceeded 37 and 67% for non-doped and doped solid-state samples respectively. The compounds were found to be capable of transporting both holes and electrons. The highest mobility values of more than 1 × 10−4 cm2V−1s−1 were obtained for the compound having three phenothiazine moieties at electric field of more than 1 × 106 Vcm−1. Additionally, three types of organic light emitting diodes based on these materials were fabricated. The device containing non-doped emission layer with the compound containing single phenothiazine moiety as the emitter gave maximum external quantum efficiency of 5.4%. The device with doped emission layer containing 5% solid solution of the compound having three phenothiazine moieties in an appropriate host gave maximum external quantum efficiency of 9.9%. The phosphorescent device hosted by the compound with single phenothiazine unit exhibited maximum external quantum efficiency of 10.3% and a low-efficiency roll-offs of 1% at 1000 cd/m2.

Highly Efficient Thermally Activated Delayed Fluorescence Organic Light-Emitting Diodes with Fully Solution-Processed Organic Multilayered Architecture: Impact of Terminal Substitution on Carbazole-Benzophenone Dendrimer and Interfacial Engineering.

A series of second-generation carbazole-benzophenone dendrimer substituted by several functional groups at terminal positions (subG2B) was investigated toward a thermally activated delayed fluorescence (TADF) emitter for nondoped emissive layer (EML) application in a solution-processed organic light-emitting diode (OLED). Substitution was found to dramatically alter the photophysical properties of the dendritic TADF emitters. The introduction of tert-butyl and phenyl group endows the subG2Bs with aggregation-induced emission enhancement character by suppression of internal conversion in singlet excited states. In the meantime, the introduction of a methoxy group resulted in aggregation-caused quenching character. The device performance of the OLED, where subG2B neat films were incorporated as nondoped EMLs, was found to be highly enhanced by adopting fully solution-processed organic multilayer architecture in comparison to the devices with a vacuum-deposited electron transporting layer (ETL), achieving a maximum external quantum efficiency of 17.0%. Such improvement was attributable to the improved carrier balance via intermixing at solution-processed EML/ETL interfaces. It was also found that the post-thermal annealing of the OLED at appropriate temperatures could be beneficial to enhance OLED performance by promoting the intermixing EML/ETL interface to some extent. Our findings emphasize the potential utility of dendritic TADF emitters in the solution-processed TADF-OLED and increase the importance to manipulate dendrimer/small molecule interfaces.

An approach to discovering novel exciplex supramolecular complex based on carbazole-containing 1,8-naphthalimide

A new luminescent ambipolar semiconductor consisting of 1,8-naphthalimide as an electron-accepting moiety and carbazole as an electron-donating moiety has been synthesized and characterized. The synthesized compound as ambipolar semiconductor has been investigated by using density functional theory calculations coupled with the charge-hopping model and the time-of-flight experimental method. The time-of-flight hole and electron drift mobilities in the synthesized material's layer approached about 10−4 cm2 V−1 s−1 at high electric fields. The exciplex complex is stabilized by the intermolecular hydrogen bond and electron donor-acceptor interactions. The energy of interactions between the molecules in the exciplex complex has been estimated to be about −100 kJ mol−1 by DFT. Non-doped emissive layer organic light-emitting diode (OLED) using the synthesized compound as an emitter exhibited an orange color emission with the Commission International de L'Eclairage chromaticity coordinates of (0.47, 0.49).