High Triplet Energy Level Research Articles

A phosphorated spirobi[thioxanthene] host matrix enables high-efficiency simple white thermally activated delayed fluorescence diodes

Host matrix is crucial for optimizing exciton allocation in all Thermally activated delayed fluorescence (TADF) white Organic light-emitting diodes (OLED). However, only few spiro hosts are competent since unbalanced steric and electronic effects. Herein, a new spiro core 9,9′-spirobi[thioxanthene] (ST) based host STDPO is reported, whose two peripheral diphenylphosphine oxide (DPPO) groups are incorporated to construct tridimensional steric hindrance and Intermolecular hydrogen bond (IHB) network. As consequence, STDPO achieves the high enough first triplet (T1) energy level of 2.93 eV and favorable electron mobility (µe) by the level of 10−5 cm2 V−1 s−1. Simultaneously, the well-modulated intermolecular interactions in STDPO matrix give rise to the synergistic effect of blue and yellow TADF dopants in exciton utilization. The increased rate constants and efficiencies of radiative transitions and reduced nonradiative rate constants render a photoluminescence quantum yield as high as 90% and 100% exciton utilization efficiency of dually doped white TADF film. STDPO further endowed its single-emissive-layer TADF WOLEDs with the record ηPE of 71.8 lm W−1 achieved by spiro hosts.

A wide-bandgap, high-mobility electron-transporting material containing a 9,9′-spirobithioxanthene skeleton

The efficiency and stability of organic light-emitting diodes (OLEDs) are highly dependent on the balance of carriers in the emitting layer. The lack of wide-bandgap and high-mobility electron-transporting material (ETM) has restricted the performance and processing of blue fluorescent OLEDs (FOLEDs) and green phosphorescent OLEDs (PHOLEDs) in the display industry. Herein, on the basis of a p-π conjugated 9,9′-spirobithioxanthene skeleton, a novel ETM with S and C atoms bridging phenylpyridine functional units (T3PySS) was designed and synthesized. Such a rigid and symmetrically orthogonal molecule exhibited a high triplet energy level of 2.7 eV and electron mobility comparable to the most conductive ETMs. The investigation on the bridge atom and the number of functional groups in this type of ETMs revealed that balanced inter- and intramolecular electron coupling was critical to achieving high-mobility, wide-bandgap ETM. The deep-blue FOLEDs (CIEy = 0.07) with a T3PySS electron-transporting layer reached a current density of 20 mA/cm2 and a luminescence of approximately 1000 cd/m2 at a voltage as low as 3.2 V while showing improved efficiency and stability compared to the control devices based on classical ETMs. Owing to improved charge balance, the stability of green PHOLEDs employing T3PySS was also superior to that of devices based on traditional high triplet energy ETMs.

Confining isolated chromophores for highly efficient blue phosphorescence.

High-efficiency blue phosphorescence emission is essential for organic optoelectronic applications. However, synthesizing heavy-atom-free organic systems having high triplet energy levels and suppressed non-radiative transitions-key requirements for efficient blue phosphorescence-has proved difficult. Here we demonstrate a simple chemical strategy for achieving high-performance blue phosphors, based on confining isolated chromophores in ionic crystals. Formation of high-density ionic bonds between the cations of ionic crystals and the carboxylic acid groups of the chromophores leads to a segregated molecular arrangement with negligible inter-chromophore interactions. We show that tunable phosphorescence from blue to deep blue with a maximum phosphorescence efficiency of 96.5% can be achieved by varying the charged chromophores and their counterions. Moreover, these phosphorescent materials enable rapid, high-throughput data encryption, fingerprint identification and afterglow display. This work will facilitate the design of high-efficiency blue organic phosphors and extend the domain of organic phosphorescence to new applications.

V-shaped triazine host featuring intramolecular non-covalent interaction for highly efficient white electroluminescent devices

The exploration of host materials with simultaneously excellent electrical properties and high triplet energy levels is highly essential but challenging in the fields of blue and white phosphorescence (Ph) and thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs). Herein, the symmetric V-shaped triazine host of DCzT in D-A-D molecular configuration featuring non-covalent intramolecular interactions (NCIs) was designed and synthesized through the replacement of phenyl core of highly twisted blue host of mCP by the acceptor unit of 2,4-dichloro-1,3,5-triazine. By means of the NCIs, DCzT demonstrates a relatively closed plane, thus boosting ordered molecular packing arrangement for the formation of carrier transport channel to acquire enhanced and balanced electrical performance at a high triplet energy level. Excitingly, highly efficient white TADF OLEDs was achieved displaying maximum luminance of 12000 cd m−2 and external quantum, current and power efficiencies of 23.2%, 66.9 cd A-1 and 70.0 lm W−1, respectively. This work highlights that the NCI affords a simple and intelligent way to regulate the electrical attributes of organic optoelectronic materials.

The coordinated tunning optical, electrical and thermal properties of spiro-configured phenyl acridophopsphine oxide and sulfide for host materials

Two spiro-configured phenyl acridophopsphine-based oxide and sulfide host materials, named 5-phenyl-5H-spiro[acridophosphine- 10,9′-fluorene]-5-oxide (PSAFO) and 5-phenyl-5H-spiro [acridopho-sphine-10,9′-fluorene]5-sulfide (PSAFS), were synthesized by convenient method. The lowest unoccupied molecular orbital (LUMO) energy level and electron mobility could be decreased and improved as the S-atom replaced O-atom, respectively. Then, the electron injecting/transporting ability of PSAFS is expected to be enhanced. Moreover, the S-atom would provide PSAFS with better electron-donating capability and heavier molecular weight compared with that of PSAFO. Thus, a higher HOMO (the highest occupied molecular orbital) energy level and thermal stability can be achieved due to the shallower onset of oxidation potential and increased molecular weight. Consequently, a narrower energy gap between HOMO and LUMO of PSAFS would be obtained, and its thermal stability could be improved, which is beneficial to constructing high performance device. Although the frontier molecular orbitals and thermal stability were finely controlled by molecular modification, the high triplet (T 1 ) energy level was still retained due to the limited π-conjugation. With the high T 1 , HOMO and LUMO energy levels of 2.83/2.82, −6.19/-5.66 and −2.12/-2.19 eV, PSAFO and PSAFS based blue TADF OLEDs with low driving voltages of 2.9/3.1 V and maximum EQEs of 12.4/13.8% are successfully realized. • The first spiro-configured phenyl acridophopsphine-based oxidized compounds as hosts for TADF OLEDs. • A facile method was employed to tune the optical, electrical and thermal properties of the hosts collaboratively. • The spiro-configured phenyl acridophopsphine-based oxidized compounds could successfully suppress the concentration quenching of the guest demonstrated by the blue TADF OLEDs with high performance at the high doping ratio of 30%.

Novel hole transport materials based on triphenylvinyl substituted triarylamine with excellent thermal stability for green OLEDs

In this work, by introducing triphenylvinyl group to the backbone of N, N-diaryl fluorenamine, three novel hole transport materials (HTMs), namely TFlA-BP, TFlA-Fl and TFlA-Nap, were designed and synthesized. These materials exhibit excellent thermal stability, high triplet energy levels (ET), appropriate highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels. Double layer green OLEDs with TFlA-BP, TFlA-Fl and TFlA-Nap as hole transport layer (HTL) show good electroluminescence (EL) performance with the maximum power efficiencies (ηp) and external quantum efficiency (EQE) of 3.40 lm W−1/1.29%, 3.12 lm W−1/1.35% and 3.15 lm W−1/1.29%, respectively, which are comparable to that of the NPB-based one (2.63 lm W−1/1.36%).

Robust tetrakisarylsilyl substituted spirobifluorene: Synthesis and application as universal host for blue to red electrophosphorescence

Stable hosts with high triplet energy levels are of great importance for achieving highly efficient phosphorescence organic light-emitting diodes (PhOLEDs). In this work, a simple and robust spirobifluorene derivative peripherally substituted with tetrakisarylsilyls was designed and synthesized. The spirobifluorene derivative exhibits high thermal/morphological stabilities and ultra-violet blue emissions with moderate fluorescence quantum yields. DFT calculation indicates that the frontier molecular orbitals (FMOs) are mainly associated with the spirobifluorene segment and there is very limited distribution on the peripheral substituents. PhOLEDs using TPSiF as a universal host were fabricated and blue to red emissions were achieved with high efficiencies, among which the green device using Ir(ppy)2acac as guest showed high performance with maximum luminance, current efficiency, power efficiency and external quantum efficiency (EQE) of 11690 cd m−2, 77.2 cd A−1, 47.3 lm W−1, and 21.1%, respectively. Notably, the blue devices show excellent efficiencies at high doping concentration and a 14.9% EQE was achieved at 30 wt % dopant with maximum luminance, current efficiency and power efficiency of 7782 cd m−2, 36.0 cd A−1 and 29.8 lm W−1, respectively.

Efficient Sky‐Blue Bipolar Delayed Fluorescence Luminogen for High‐Performance Single Emissive Layer WOLEDs

AbstractLuminogens with high photoluminescence efficiencies and high triplet (T1) energy levels are desired to achieve high‐performance white organic light‐emitting diodes (WOLEDs). In this work, a sky‐blue luminogen (DCB‐BP‐SFAC) with enhanced delayed fluorescence in aggregated state, bipolar carrier transport ability and high T1 energy level is developed. DCB‐BP‐SFAC exhibits bright sky‐blue electroluminescence (EL) in both non‐doped and doped OLEDs with maximum external quantum efficiencies of 14.8% and 23.5%. DCB‐BP‐SFAC can function as efficient host for green, orange and red phosphorescent materials as well as thermally activated delayed fluorescence emitters with excellent EL performance. In addition, fluorescence/phosphorescence hybrid and all‐fluorescence WOLEDs with a single emissive layer are fabricated by adopting DCB‐BP‐SFAC as emitter and host simultaneously. The all‐fluorescence WOLED shows two‐color warm‐white light with good EL efficiencies of 47.1 cd A−1, 46.2 lm W−1, and 19.1%. The excellent performance of these OLEDs demonstrates the great application potential of DCB‐BP‐SFAC in practical display and lighting devices.

Improved performance of fluorescent/phosphorescent hybrid white organic light-emitting diodes with enhanced chromatic stability utilizing bipolar interlayer

Fluorescent/phosphorescent hybrid white organic light-emitting diodes (WOLEDs) employing a bipolar CBP interlayer with different thickness have been fabricated. The two-color hybrid WOLEDs at the optimal interlayer thickness exhibit a maximum efficiency of 11.47 cd A−1. Compared with the device without a CBP interlayer, the efficiency of the device is increased by 38.5% and the chromatic stability is also improved. This work found that appropriate thickness of the CBP interlayer with a higher triplet energy level can effectively block the Dexter energy transfer between the phosphorescent and fluorescent layers, which can reduce the energy of triplet in the exciton recombination zone and improve the efficiency of the device. Furthermore, the introduction of the bipolar interlayer with a suitable energy level adjusts the balance of exciton distribution, thereby achieving white light emission with good color stability. The present research could provide valuable strategy in developing hybrid WOLEDs with stable chromaticity.

Highly-efficient red-to-yellow/green upconversion sensitized by phthalocyanine palladium with high triplet energy-level.

Soluble 3,7,11,15-tetra(tert-butyl)phthalocyanine palladium (TBPcPd) and 3,7,11,15-tetra(pentyloxy)phthalocyanine palladium (POPcPd) were synthesized and employed as sensitizers in expectation of achieving red-to-yellow/green upconversion (UC), doped with rubrene (Rub) and 9,10-bis(phenylethynyl)anthracene (BPEA), respectively. Under excitation of a 655 nm diode laser (∼1.5 W cm−2), a maximum red-to-green UC efficiency of 0.07% and a maximum red-to-yellow UC efficiency of 8.03% were obtained and the latter can drive a Si-photodiode to generate obvious photocurrent. The results showed that although a large triplet energy-level difference (ΔE = 3Esen. − 3Eanni.) of the sensitizer (3Esen.)/annihilator (3Eanni.) pair helps to improve the upconversion, the sensitizer/annihilator pair with a ΔE value less than zero still works. However, when the ΔE ≤ −0.05 eV, this bicomponent pair is not valid anymore. Thus, a comparison of the ΔE value can predict whether the sensitizer/annihilator pair is useful, which presents a quantitatively evaluated approach for exploring new-type upconversion systems for the first time.

Novel multifunctional fluorene-phenanthroimidazole hybrid materials: Non-doped near-ultraviolet fluorescent emitter and host for green phosphorescent OLEDs

Deep-blue-emissive host materials are crucial to achievement of high-performance full-color organic light-emitting diodes (OLEDs), simplifying the manufacturing process and reducing production costs. To develop efficient deep-blue-emissive host materials is still challenging. By incorporating 9,9-diphenylfluorene moiety into phenanthroimidazole via the insulating N1 position of imidazole, two fluorene-phenanthroimidazole hybrid near-ultraviolet-emitting materials FL-PI and FL-BPI were designed and synthesized. The photophysical property, thermal and amorphous ability, electrochemical property and electron structure could be effectively regulated by molecular design strategy. Both FL-PI and FL-BPI exhibited moderate near-ultraviolet emission (0.50/0.63), high triplet energy level (2.58/2.57eV), high thermostability (Td: 371/542 °C; Tg: 134/210 °C) and carrier-transporting nature. Non-doped near-ultraviolet OLEDs adopting FL-BPI emitter showed the maximum efficiencies of 5.4%, 3.8 cd A−1 and 2.8 lm W−1 with the CIE coordinates of (0.15, 0.05). In addition, FL-PI/FL-BPI-hosted green phosphorescent OLEDs demonstrated the maximum efficiencies of 16.3%, 28.8 cd A−1, 21.1 lm W−1 and 21.1%, 75.3 cd A−1, 27.8 lmW−1, respectively. Moreover, the external quantum efficiencies of FL-PI/FL-BPI-hosted green phosphorescent devices remained as high as 16.1% and 21.0% at 1000 cd m−2. This work demonstrates that the strategy for the development of near-ultraviolet high-emissive host materials is feasible.

Tetrabenzeneaza macrocycle: A novel platform for universal high-performance hole transport materials

In this research, a novel macrocycle containing tetrabenzeneaza has been developed as a novel building block for hole transport materials (HTMs). Benefiting from its unique highly twisted spatial configuration, this macrocycle exhibits high triplet energy level (ET) as well as high hole mobility. Based on this aza macrocycle, two hole transporting materials, namely 2TPATPCA and 2CzTPCA, were designed and synthesized. Both 2TPATPCA and 2CzTPCA possess enough ETs, appropriate frontier orbital energy levels as well as good thermal stability, which promote them as universal HTMs in multicolor phosphorescent organic light-emitting devices (PhOLEDs) and thermal activated delay fluorescence (TADF) OLEDs. High external quantum efficiencies (EQEs) were realized in OLEDs using the these two HTMs. For example, sky bule PhOLED with 2CzTPCA showed a significantly improved maximum EQE of 20.3% compared to that of the reference device using N,N′-Bis(naphthalen-1-yl)-N,N′-bis(phenyl)benzidine (NPB) (EQE of 14.2%) and 4,4′-Cyclohexylidenebis[N,N- bis(4-methyl phenyl)aniline (TAPC) (EQE of 12.2%). Green TADF OLED using 2CzTPCA as HTM also exhibit a much improved maximum EQE of 17.9% compared to that of the reference device based on NPB (EQE of 10.3%). These results indicate this tetrabenzeneaza macrocyclic is a promising building block for developing universal high-performance HTMs.

Electron blocking materials based on dimethyl-dihydrobenzofuran derivatives for highly efficient and long-lifetime blue fluorescent organic light-emitting diodes

Abstract Three dimethyl-dihydrobenzofuran derivatives, 7-(5-(dibenzo[b,d]furan-4-yl)- [1,1′-biphenyl]-3-yl)-12,12-dimethyl-7,12-dihydrobenzofuro[3,2-b]acridine (ΔΦΒΔΔβΑ), 7-(3,5-bis(dibenzo[b,d]furan-4-yl)phenyl)-12,12-dimethyl-7,12-dihydrobenzofuro[3,2-b]acridine (BDFPDDbA) and 13-(3,5-bis(dibenzo[b,d]furan-4-yl)phenyl)-5,5-dimethyl-5,13-dihydrobenzofuro[3,2-c]acridine (BDFPDDcA) were synthesized and applied as electron blocking layer (EBL) materials in blue fluorescent organic light-emitting diodes. These EBL materials exhibited excellent physical properties and good thermal stability, as evidenced by their high glass transition temperatures of above 120 °C. The blue emission peaks of all three EBL materials were around 466 nm. The high triplet energy levels of the three EBL materials were effective for increasing the external quantum efficiency (EQE). The device based on ΔΦΒΔΔβΑ showed a high EQE of 7.15% and a long lifetime of 277 h at 10 mA cm−2. This lifetime was eight times longer than that of the 4,4′,4″-tris(N-carbazolyl)-triphenylamine-based device.

Resonance hosts for high efficiency solution-processed blue and white electrophosphorescent devices

The exploration of high-performance solution-processible host materials for blue and white electrophosphorescent devices is a key and fundamental challenge in the ongoing development of organic semiconductors. Herein, two solution-processible resonance host materials with self-adaptive characteristics are delicately designed and constructed. Because of the dynamic tautomerization upon resonance variation, these smart hosts show self-adaptive and selectively enhanced charge carrier flux at high triplet energy levels. Conferred by the resonance molecules, solution-processed blue and white devices exhibit excellent maximum current efficiencies (CEs) of 29.8 and 57.3 cd A−1, and external quantum efficiencies (EQEs) up to 14.5% and 23.5%, respectively. Our works highlight the significant progress of the solution-processed phosphorescent organic light-emitting diodes (PhOLEDs) using resonance host molecules, potentially furnishing a leap forward in constructing advanced organic semiconductors for next-generation optoelectronic devices.

Sky-blue thermally activated delayed fluorescence polymers with π-interrupted polymer mainchain via Friedel-Crafts polycondensation

Thermally activated delayed fluorescence (TADF) polymers have aroused persistent passion for the application of solution processed organic light emitting diodes (OLEDs). However, the lack of novel polymer structures and efficient TADF polymers proposes an imperative task to deal with. Herein, we designed and synthesized a series of TADF polymers by simple superacid-catalyzed polyhydroxyalkylation. The relatively high triplet energy level (2.88 eV) arising from the conjugation confined backbone effectively avoided energy back transfer from the TADF units to the mainchain. Combining with the side chain engineering strategy, the designed TADF polymers successfully inherited the feature from the dangled TADF moieties. With these TADF polymers as emitting layers, the solution processed polymer light emitting diodes (PLEDs) achieved a maximum external quantum efficiency (EQE) of 4.1% with CIE (Commission Internationale de L'Eclairage) coordinates of (0.26, 0.44).

An Organic Laser Dye having a Small Singlet‐Triplet Energy Gap Makes the Selection of a Host Material Easier

AbstractQuenching of singlets by long‐lived triplets is a serious issue for lasing from organic laser dyes, especially under long pulse excitation. As a strategy to scavenge or manage unnecessary triplets, an organic laser dye is dispersed into a host material having high singlet and low triplet energy levels [a large singlet‐triplet energy gap (ΔEST)]. However, finding such a host material having a triplet scavenging capability is limited. In this study, an organic laser dye, 2,6‐dicyano‐1,1‐diphenyl‐λ5σ4‐phosphinine (DCNP), having a small ΔEST of ≈0.44 eV is synthesized, and thus 4‐4′‐bis[(N‐carbazole)styryl] biphenyl (BSBCz) can be employed as a triplet scavenging host, i.e., the triplets formed on DCNP are easily transferred to BSBCz. A 1 wt%‐DCNP‐doped BSBCz film is formed on a mixed‐order distributed feedback grating, showing lasing with a low threshold value of ≈0.86 µJ cm−2 and a full‐width‐at‐half‐maximum value of ≈0.5 nm. Because of the suppressed singlet‐triplet annihilation, DCNP‐based laser devices operating under a continuous‐wave regime, with a low threshold of 72 W cm−2 and a long laser half‐lifetime of ≈3 min, are demonstrated. These results indicate a possibility of the wider selection of host materials, easing a material design strategy of fabricating high‐performance laser devices in future.

Molecular engineering by σ-Bond spacer enables solution-processable host materials for TADF emitter towards high-performance OLEDs

High-performance solution-processable host materials for thermally activated delayed fluorescence (TADF) emitters are of great significance to the development of organic light-emitting diodes (OLEDs). In this study, three solution-processable hosts, namely mCP-Ph, mCP-Py, and mCP-BmPy featuring a basic structure paradigm of donor-σ-acceptor (D-σ-A) are reported for green TADF OLEDs. Attributing to the well-designed structure, the three host materials exhibited high triplet energy levels and excellent solution processability. It was found that the host materials had a significant impact on the excited state characteristics of the TADF emitter, and the mCP-Ph host with the lowest dipole moment showed the highest intersystem crossing rate constants (kISC and kRISC). In consequence, solution-processed TADF OLEDs based on the emitter 4-(4-(9,9-dimethylacridin-10(9H)-yl)phenyl)-2,6-diphenylpyridine-3,5-dicarbonitrile (DMAC-PCN) and the host 9-(3-(9H-carbazol-9-yl)phenyl)-3-(2,7-di-tert-butyl-9-phenyl-9H-fluoren-9-yl)-9H-carbazole (mCP-Ph) secured a maximum external quantum efficiency of 21.6%, demonstrating the effectiveness of the host engineering by σ-spacer. This work reveals the important principle for designing bespoke host for TADF emitters.

Symmetrical spirobi[xanthene] based locally asymmetrical phosphine oxide host for low-voltage-driven highly efficient white thermally activated delayed fluorescence diodes

• A spiro host with local asymmetry for blue and white TADF OLED. • Intermolecular interactions are optimized for optoelectronic improvement. • The full-TADF white OLED achieved the state-of-the-art performance. The balance between the electrical performance and quenching suppression is crucial to develop the efficient host materials for full-thermally activated delayed fluorescence (TADF) white organic light-emitting diodes (WOLEDs). In this work, through introducing one bulky diphenylphosphine oxide (DPPO) group at 4 position of each xanthene ring in a symmetrical and orthogonal spirobi[xanthene] (SX) skeleton, 9,9′-spirobi[xanthene]-4,4′-diylbis(diphenylphosphine oxide) ( SXDPO ) was constructed, giving rise to the optimized intermolecular interactions. Besides the high triplet (T 1 ) energy level of 2.94 eV, the highly rigid configuration of SXDPO simultaneously rendered the dramatically suppressed excited-state relaxation and the stable and uniform amorphous phase of its films before and after doping TADF dyes. It was interesting that SXDPO showed the complementary electrical properties to enhance the carrier transportation in the films. Therefore, SXDPO successfully achieved the balance between the electrical performance improvement and the collisional quenching suppression. As the result, SXDPO endowed its complementary TADF WOLEDs with the state-of-the-art performance, e.g. the turn-on voltage as low as 2.8 V and power efficiency beyond 60 lm W −1 , which was one of the best comprehensive results reported so far for full-TADF WOLEDs.

Carbazole-modified polyphenylene ether as host materials for high efficiency phosphorescent organic light-emitting diodes

Two novel polymeric hosts called PPO-Cz and PPO-3Cz for solution-processed green phosphorescent organic light-emitting devices have been designed and synthesized by incorporating electron-donor carbazole units with polyphenylene ether. In order to simplify the synthesis route and save cost, we attached the classic carbazole units directly to the side chain of the polyphenylene ether. This molecular design endows these two polymeric hosts with good thermal stability and high triplet energy levels. PPO-Cz- and PPO-3Cz-based emissive-layer green phosphorescent organic light-emitting diodes were fabricated with simplified device configuration by solution-processed using Ir(mppy)3 as a dopant. These devices exhibited lower turn on voltages. Moreover, the PPO-3Cz-based solution processed device showed maximum current efficiency and external quantum efficiency of 31.8 cd/A and 9.3%, respectively. This result demonstrated that the newly synthesized, polymeric hosts were advantageous for fabrication of highly efficient green phosphorescent organic light-emitting diodes.

Delayed Fluorescence Emitter Enables Near 17% Efficiency Ternary Organic Solar Cells with Enhanced Storage Stability and Reduced Recombination Energy Loss

AbstractCharge transfer state (CT) plays an important role in exciton diffusion, dissociation, and charge recombination mechanisms. Enhancing the utilization and suppressing the recombination process of CT excitons is a promising way to improve the performance of organic solar cells (OSCs). Here, an effective method is presented via introducing a delayed fluorescence (DF) emitter 3,4‐bis(4‐(diphenylamino)phenyl)acenaphtho[1,2‐b]pyrazine‐8,9‐dicarbonitrile (APDC‐TPDA) in OSCs. The long‐lifetime singlet excitons on APDC‐TPDA can transfer to polymer donors to prolong exciton lifetime, which ensures sufficient time for diffusion and dissociation. Concurrently, the high triplet energy level (T1) of the DF material can also prevent the reverse energy transfer from CT to T1. APDC‐TPDA‐containing ternary OSCs shows a high PCE of 16.96% with a reduced recombination energy loss of 0.46 eV. It is noteworthy that the ternary OSC also exhibits superior storage stability. After 55 days of storage, the PCE of the ternary OSC still retains about 96% of its primitive state. Furthermore, this ternary strategy is efficient and universally applicable to OSCs, and positive results can be obtained in different systems with different DF emitters. These results indicate that the ternary strategy provides a new design idea to realize high performance OSCs.