Organic Electronics最新文献_第4页

Suppression of dead zones in slot-coated organic thin films by monitoring of meniscus formation for OLEDs 通过监测 OLED 的半月板形成抑制槽涂有机薄膜中的死区

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-30 DOI: 10.1016/j.orgel.2024.107131

Jeongpil Na, Gieun Kim, Jongwoon Park

{"title":"Suppression of dead zones in slot-coated organic thin films by monitoring of meniscus formation for OLEDs","authors":"Jeongpil Na, Gieun Kim, Jongwoon Park","doi":"10.1016/j.orgel.2024.107131","DOIUrl":"10.1016/j.orgel.2024.107131","url":null,"abstract":"<div>There inevitably appear dead zones in organic thin films fabricated by sheet-to-sheet slot-die coating because a coating start varies and the recovery time of internal pressure in slot-die head differs for each coating, resulting in poor coating repeatability. Slot-coated thin films within dead zones are thinner or thicker, possibly causing non-uniform light emission from solution-processable organic light-emitting diodes (OLEDs). To tackle it, we have devised an automatic coating start method based on the monitoring of meniscus formation. It automatically starts coatings when the cross-sectional area of meniscus reaches a certain optimal value in such a way that the start of each coating is kept unchanged. It is found that high-viscosity (4800 cPs) polydimethylsiloxane (PDMS) requires a longer time for the internal pressure of slot-die head to reach a steady state than low-viscosity (80 cPs) poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS). It can be reduced to a great extent by applying a method of discharging the solution in advance (pre-discharging scheme). Compared with high-viscosity PDMS films, low-viscosity PEDOT:PSS films are shown to have longer dead zones and poorer repeatability due to the fact that the dead zone of relatively thin films varies sensitively to a small change in the coating start timing. With this scheme, we have successfully fabricated a highly uniform OLED device with no dead zones in the emission area.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"134 ","pages":"Article 107131"},"PeriodicalIF":2.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing the operational stability of OLED devices through the utilization of deuterated TTU host materials 利用氚化 TTU 主材料提高有机发光二极管设备的运行稳定性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-28 DOI: 10.1016/j.orgel.2024.107129

Cangyu Wang , Xiaoge Song , Sinyeong Jung , Wansi Li , Maggie Ng , Season Si Chen , Man-Chung Tang

{"title":"Enhancing the operational stability of OLED devices through the utilization of deuterated TTU host materials","authors":"Cangyu Wang , Xiaoge Song , Sinyeong Jung , Wansi Li , Maggie Ng , Season Si Chen , Man-Chung Tang","doi":"10.1016/j.orgel.2024.107129","DOIUrl":"10.1016/j.orgel.2024.107129","url":null,"abstract":"<div>Recent research on anthracene-based hydrocarbon (PNA) as the emissive layer host found that deuteration mediated the formation of these adduct species, presumably quenchers, and thus improved the device lifetime. Meanwhile, studies on deuterium in PNA host materials with stepwise deuteration are scarce. In this work, we report a systematic study of isotopic effects through independent deuteration of the phenyl or/and the dibenzofuran unit on a series of PNA materials polyaromatic dibenzofuran (PAF, PAF-d5, PAF-d7 and PAF-d12). We fabricated fluorescent OLED based on this triplet-triplet up-conversion active host materials for conventional MR-TADF emitter. A short-lived excited delayed lifetime of less than 2 μs has been observed in their electroluminescence decay studies. In addition, LT80 of up to 12.7 h has been observed in PAF-d12 at the brightness of 1000 cd m−2, corresponding to a 4-fold enhancement of OLED stability compared to the non-deuterated counterpart. We hope the current research can provide insights for further device improvement.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"134 ","pages":"Article 107129"},"PeriodicalIF":2.7,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142122361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Laminated high-performance semi-transparent perovsktie solar cells: Enabled by sticky polyethyleminine as glue” [Org. Electron. 100 (2022) 106352] 对 "层压式高性能半透明过ovsktie 太阳能电池：使用粘性聚乙稀作为胶水"[Org.

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-18 DOI: 10.1016/j.orgel.2024.107118

Hao Zhang , Rui Liu , Shuxuan Guo , Zhenguo Wang , Xue Sun , Jian Lin , Qun Luo , Chang-Qi Ma

引用次数: 0

Deep-blue electroluminescence with orthogonal donor-acceptor structure: The role of charge-transfer excited state component in hybrid local and charge-transfer (HLCT) excited state 具有正交供体-受体结构的深蓝色电致发光：电荷转移激发态成分在混合局部和电荷转移（HLCT）激发态中的作用

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-18 DOI: 10.1016/j.orgel.2024.107121

Xinlun Zheng , Xuzhou Tian , Yilong Li , Haichao Liu , Shi-Tong Zhang , Bing Yang

{"title":"Deep-blue electroluminescence with orthogonal donor-acceptor structure: The role of charge-transfer excited state component in hybrid local and charge-transfer (HLCT) excited state","authors":"Xinlun Zheng , Xuzhou Tian , Yilong Li , Haichao Liu , Shi-Tong Zhang , Bing Yang","doi":"10.1016/j.orgel.2024.107121","DOIUrl":"10.1016/j.orgel.2024.107121","url":null,"abstract":"<div>In this work, three orthogonally bonded phenanthroimidazole based donor-acceptor (D-A) structured blue-emissive materials N-SBPMCN, N-ABPMCN and N-TBPMCN with different donor moieties are designed synthesized. Theoretical combined experimental researches proved that the involving of weak donor (spiro-fluorene and anthracene) and strong donor triphenylamine can form different locally-emissive (LE) dominated hybrid local and charge-transfer (HLCT) excited state, which can contribute to their high photoluminescent quantum yield (PLQY), satisfied electroluminescence performance and blue purity. Specifically, N-TBPMCN with strong donor triphenylamine that possesses more CT excited state components demonstrates the best electroluminescence performance and blue purity among the three materials, revealing that the molecular design of orthogonal D-A structure is of great potential in blue-emissive functional materials. Additionally, we also discovered that intermolecular CT state can also contribute to high exciton utilization.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"134 ","pages":"Article 107121"},"PeriodicalIF":2.7,"publicationDate":"2024-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142075953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Benzimidazole based electron-transport hosts for efficient pure blue narrowband OLED device 基于苯并咪唑的电子传输宿主，用于高效纯蓝窄带 OLED 器件

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-18 DOI: 10.1016/j.orgel.2024.107120

Yuliang Wu , Mengyu Wang , Kaiyuan Zhang , Xianghui Tian , Shumeng Wang , Lixiang Wang

引用次数: 0

Patterned flexible Silver Nanowire/2D MXene transparent conducting electrode for organic light-emitting diodes 用于有机发光二极管的图案化柔性银纳米线/二维 MXene 透明导电电极

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-10 DOI: 10.1016/j.orgel.2024.107112

Bongjun Choi , Byoung Wan Lee , Duong Nguyen Nguyen , Hyungu Han , Seamin Park , In Sun Yoon , Chan-Jae Lee , Jung Kyu Kim , Young-Seok Kim

{"title":"Patterned flexible Silver Nanowire/2D MXene transparent conducting electrode for organic light-emitting diodes","authors":"Bongjun Choi , Byoung Wan Lee , Duong Nguyen Nguyen , Hyungu Han , Seamin Park , In Sun Yoon , Chan-Jae Lee , Jung Kyu Kim , Young-Seok Kim","doi":"10.1016/j.orgel.2024.107112","DOIUrl":"10.1016/j.orgel.2024.107112","url":null,"abstract":"<div>With the advent of numerous flexible optoelectronic applications, the importance of flexible and stable transparent conducting electrodes (TCEs) has been considerable. The conventional silver nanowire (AgNW) is a promising candidate as TCEs due to its decent opto-electrical properties and solution processibility. However, AgNW's high surface root mean square (RMS) roughness, relatively high sheet resistance, and low work function (∼4.5 eV) limit the usage for display applications. In this work, we design and study the AgNW and MXene (Ti3C2Tx) hybrid TCEs for flexible organic light-emitting diodes (OLEDs) to enhance the optoelectrical properties and the hole injection within the device. Experiment investigation is carried out via an application of AgNW/MXene (AgMX) hybrid TCEs as a bottom electrode for OLEDs devices in which the photolithography process and lift-off technique are employed for such fabrication. The hybrid TCEs indicate high optical transparency (86.8 % at 550 nm) and low sheet resistance (24.1 Ω/cm2) as well as improved surface morphology, enabling the efficient OLEDs operation. The optimized OLEDs exhibit a clear and stable red electroluminescence (EL) peak with an improved maximum external quantum efficiency (EQE) and luminance of 5.25 % and 3421.7 cd/m2, respectively. Furthermore, the hybrid TCEs are readily formed on poly(ethylene terephthalate) (PET) substrate, showing high durability under the bending test up to 100,000 cycles. The results demonstrate that adopting AgMX TCEs is a reasonable strategy for obtaining proper flexible optoelectronic devices.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"133 ","pages":"Article 107112"},"PeriodicalIF":2.7,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141984788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-layer encapsulation film with CaO absorbent by solution process 采用溶液工艺生产含 CaO 吸附剂的单层封装薄膜

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-10 DOI: 10.1016/j.orgel.2024.107119

Hyesu Lee, Seong Jun Son, Jae-Woong Yu

{"title":"Single-layer encapsulation film with CaO absorbent by solution process","authors":"Hyesu Lee, Seong Jun Son, Jae-Woong Yu","doi":"10.1016/j.orgel.2024.107119","DOIUrl":"10.1016/j.orgel.2024.107119","url":null,"abstract":"<div>A method for preparing a single-layer encapsulation film using an organic-inorganic hybrid precursor solution processing was investigated. The film was created using a commodity epoxy and graphene oxide to ensure cost-effectiveness. Fast curing and annealing techniques, including microwave and intense pulsed light exposure, were employed. Calcium oxide nanoparticles were incorporated as a special moisture absorbent to improve the film's barrier properties. The barrier performance of the single layer encapsulation film was considerably enhanced by post-treatment of these nanoparticles. The characterization of the calcium oxide nanoparticles after post-treatment was performed using transmission electron microscopy with energy-dispersive X-ray spectroscopy, FT-IR, Brunauer-Emmett-Teller test. The composite epoxy encapsulation film, incorporating graphene oxide and post-treated calcium oxide nanoparticles, reduced water permeability approximately 400 times compared to the neat epoxy encapsulation film. This substantial improvement makes it suitable for use in flexible disposable electronics. The enhanced water vapor blocking efficiency is attributed to the combined effect of pathway block by graphene oxide and moisture absorption by calcium oxide.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"133 ","pages":"Article 107119"},"PeriodicalIF":2.7,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Recombination reduction by ammonium additives in ambient air process for organometal halide perovskite solar cells 在有机金属卤化物过氧化物太阳能电池的环境空气工艺中使用铵添加剂减少重组

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-10 DOI: 10.1016/j.orgel.2024.107105

Kyungmin Lee, Seungyeon Hong, Hyo Jung Kim

{"title":"Recombination reduction by ammonium additives in ambient air process for organometal halide perovskite solar cells","authors":"Kyungmin Lee, Seungyeon Hong, Hyo Jung Kim","doi":"10.1016/j.orgel.2024.107105","DOIUrl":"10.1016/j.orgel.2024.107105","url":null,"abstract":"<div>Organometal halide perovskite solar cells (PSCs) have achieved power conversion efficiencies (PCE) greater than 26 %, making them attractive photovoltaic devices. However, achieving high-performance PSCs typically requires inert gas conditions and antisolvent processes, which are hurdles to the commercialization of PSCs. To overcome these problems, we adopted a vacuum flash-assisted process (VASP) under ambient air conditions. In addition, to minimize the effect of moisture and enhance crystal growth, we adopted an additive engineering strategy using ammonium salts (NH4X, X = I, Cl, and SCN). Among the various ammonium salts, ammonium iodide (NH4I) exhibited the best device performance, with a PCE of 19.8 %. The role of the ammonium salts was studied using photoluminescence (PL), scanning electron microscopy (SEM), grazing incidence wide-angle X-ray scattering (GIWAXS), and the device characteristics of the devices. In addition, we measured the wet film state using X-rays to study the effects of ammonium salts on the crystallization process. From these measurements and analyses, we found that the ammonium additives induced rapid crystallization of the perovskite layer, and NH4I induced a uniform crystalline state of the film in the vertical direction. The uniformity of the crystalline state was related to the reduction in charge recombination and the enhancement of the PCE in the NH4I added devices.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"133 ","pages":"Article 107105"},"PeriodicalIF":2.7,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141979849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Efficient orange‒red/red thermally activated delayed fluorescence materials based on 1,8-naphthalimide and donor engineering 基于 1,8-萘二甲酰亚胺和供体工程的高效橙红/红热激活延迟荧光材料

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-08 DOI: 10.1016/j.orgel.2024.107113

Jing Zhang , Zhang-Li Cheng , Jia-Chen Li , Jie Li , Hui Wang , Feng Huang , Ying-Chun Cheng , Xin Xiong , Hao Wu , Jie-Yu Zhou , Wen Gao , Kai Wang , Xiao-Hong Zhang , Jun Ye

{"title":"Efficient orange‒red/red thermally activated delayed fluorescence materials based on 1,8-naphthalimide and donor engineering","authors":"Jing Zhang , Zhang-Li Cheng , Jia-Chen Li , Jie Li , Hui Wang , Feng Huang , Ying-Chun Cheng , Xin Xiong , Hao Wu , Jie-Yu Zhou , Wen Gao , Kai Wang , Xiao-Hong Zhang , Jun Ye","doi":"10.1016/j.orgel.2024.107113","DOIUrl":"10.1016/j.orgel.2024.107113","url":null,"abstract":"<div>Low-cost and efficient long-wavelength thermally activated delayed fluorescence (TADF) materials are crucial for organic light-emitting diodes (OLEDs) applications. In this study, 1,8-naphthalimide (NAI)-based D-A-type molecules were explored with a focus on donor engineering. A green-emitting non-TADF original control, the NAI/triphenylamine (TPA) hybrid NAI-TPA, was subjected to structural locking by oxygen-atom bridges on the TPA unit and further adopted an adjacent two-donor configuration to obtain two efficient orange-red/red TADF emitters, NAI-DPXZ and NAI-2DPXZ. The two compounds exhibited both significantly redshifted electroluminescence and improved external quantum efficiency (EQE), reaching 22.12 % at 583 nm and 11.17 % at 622 nm, respectively, which are approximately 2–3 times greater than those achieved by the O-bridges-free controls NAI-TPA (7.38 % at 517 nm) and NAI-2TPA (5.80 % at 564 nm). This work may provide an effective design strategy for the development of high-performance and low-cost orange-red/red TADF materials.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"133 ","pages":"Article 107113"},"PeriodicalIF":2.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141934110","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sandwich-type thermally activated delayed fluorescence molecules with through-space charge transfer excited state for red OLEDs 用于红色有机发光二极管的具有穿透空间电荷转移激发态的夹层型热激活延迟荧光分子

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-08 DOI: 10.1016/j.orgel.2024.107114

Peihao Chen , Chenglin Jiang , Nengquan Li , Xiu-Fang Song , Xintong Wan , He Liu , Jian-Gong Yang , Kai Li

{"title":"Sandwich-type thermally activated delayed fluorescence molecules with through-space charge transfer excited state for red OLEDs","authors":"Peihao Chen , Chenglin Jiang , Nengquan Li , Xiu-Fang Song , Xintong Wan , He Liu , Jian-Gong Yang , Kai Li","doi":"10.1016/j.orgel.2024.107114","DOIUrl":"10.1016/j.orgel.2024.107114","url":null,"abstract":"<div>Exploring through-space charge transfer (TSCT) excited state for the design of thermally activated delayed fluorescence (TADF) emitters has been receiving increasing interest for organic light-emitting diodes (OLEDs). In this work, we developed two TSCT-TADF molecules, namely 2DPXZ-QX and 2DPXZ-DFQX, which have sandwich-type donor-acceptor-donor (D-A-D) structures supported by two carbazole bridges. Dibenzo[a,c]phenazine (QX) and its fluorinated derivative (DFQX) were used as the acceptors and O-bridged triphenylamine (DPXZ) was used as the donor. The two donors and acceptor in each molecule are aligned in a face-to-face orientation and thus result in the presence of intramolecular π–π interactions, as revealed by their single crystal X-ray structures. The emission maxima (λPL) of 2DPXZ-QX and 2DPXZ-DFQX in doped 1,3-bis(N-carbazolyl)benzene films are 595 and 600 nm with photoluminescence quantum yields of 67 % and 54 %, respectively. The delayed fluorescence lifetimes are 8.8 and 6.7 μs. OLEDs based on the new sandwich-type emitters show maximum external quantum efficiencies of up to 19.1 %.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"133 ","pages":"Article 107114"},"PeriodicalIF":2.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141964125","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0