Organic Electronics最新文献_第8页

Efficient thermally activated delayed fluorescence materials from symmetric anthraquinone derivatives for high-performance red OLEDs 用于高性能红色 OLED 的对称蒽醌衍生物高效热激活延迟荧光材料

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-11 DOI: 10.1016/j.orgel.2024.107142

Zhentao Bai , Xiangrui Li , Min Wang , Letian Xu , Ruming Jiang , Ben Zhong Tang , Zujin Zhao

{"title":"Efficient thermally activated delayed fluorescence materials from symmetric anthraquinone derivatives for high-performance red OLEDs","authors":"Zhentao Bai , Xiangrui Li , Min Wang , Letian Xu , Ruming Jiang , Ben Zhong Tang , Zujin Zhao","doi":"10.1016/j.orgel.2024.107142","DOIUrl":"10.1016/j.orgel.2024.107142","url":null,"abstract":"<div>Constructing efficient red thermally activated delayed-fluorescence (TADF) materials for high-performance organic light-emitting diodes (OLEDs) remains challenging due to the formidable barrier of energy gap law. In this work, a design strategy of connecting two donor units to the adjacent positions of electron acceptor is proposed for creating red luminescent materials, and four Y-shaped TADF molecules consisting of strong electron-withdrawing anthraquinone (AQ) acceptor and triphenylamine or acridine-based donors are designed and synthesized. They exhibit strong red emissions (604−618 nm) in toluene solutions and orange/red emissions (566−608 nm) with good photoluminescence quantum yields (43−68%) in doped films, and enjoy small singlet-triplet energy gaps (0.02−0.10 eV) and fast reverse intersystem crossing processes (1.5–7.3 × 105 s−1), which are attributed to the unique Y-shape structure. A maximum external quantum efficiency of 19.5% with an electroluminescence peak at 616 nm is achieved for AQ-PTPA-based red doped device, representing the highest level for red TADF-OLEDs based on AQ acceptor in the literature. This work can provide guidance for the design of efficient red delayed-fluorescence molecules for the application in OLEDs.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107142"},"PeriodicalIF":2.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142232380","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

Free carrier generation efficiency in organic photovoltaic films determined using photo-MIS-CELIV 利用光-MIS-CELIV 测定有机光伏薄膜中的自由载流子生成效率

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-11 DOI: 10.1016/j.orgel.2024.107137

Mile Gao , Shaun McAnally , Hui Jin , Paul L. Burn , Almantas Pivrikas , Paul E. Shaw

{"title":"Free carrier generation efficiency in organic photovoltaic films determined using photo-MIS-CELIV","authors":"Mile Gao , Shaun McAnally , Hui Jin , Paul L. Burn , Almantas Pivrikas , Paul E. Shaw","doi":"10.1016/j.orgel.2024.107137","DOIUrl":"10.1016/j.orgel.2024.107137","url":null,"abstract":"<div>Solution processed organic photovoltaic (OPV) devices are promising for low-embedded energy and large-scale renewable energy production. The efficiency of charge carrier generation is a critical factor influencing the performance of photovoltaic devices. However, quantifying charge carrier generation can be challenging, with the results from experimental methods not always being easily correlated with solar cell performance. In this paper, we describe how photoinduced metal-insulating-semiconductor charge-extraction-by-linearly-increasing-voltage (photo-MIS-CELIV) can be used to determine the free charge carrier generation efficiency (FCGE) in OPV films. One of the benefits of this approach is that the FCGE can be measured alongside the charge mobility to provide a holistic picture of the fate of charges, from generation to extraction. We demonstrate this method through quantifying the FCGE of bulk heterojunctions of PCE10:ITIC-4F, D18:Y6 and PPDT2FBT:PC71BM, obtaining values of 47.4 ± 1.6 %, 75.0 ± 2.5 % and 70.6 ± 4.6 %, respectively. The measured FCGEs for these blends were consistent with the device-based external quantum efficiencies (EQEs) at the excitation wavelength used. The use of photo-MIS-CELIV for quantifying the FCGE increases its utility beyond simple charge mobility measurements and provides an extra method to enable optimisation of OPV device performance.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107137"},"PeriodicalIF":2.7,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S1566119924001484/pdfft?md5=810828eb1a8aa4dd7d5bfc46a8deb41c&pid=1-s2.0-S1566119924001484-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142242332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancing photovoltaic performance and stability of inverted perovskite solar cells via multifunctional molecular additive 通过多功能分子添加剂提高倒置型过氧化物太阳能电池的光伏性能和稳定性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-11 DOI: 10.1016/j.orgel.2024.107139

Qi Li , Qi Zeng , Pavel A. Troshin , Qinye Bao , Shaobing Xiong

引用次数: 0

Enhancing the reliability of InP-based QD color conversion layer through a uniform organic encapsulation layer via inkjet printing 通过喷墨打印均匀的有机封装层提高基于 InP 的 QD 颜色转换层的可靠性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-10 DOI: 10.1016/j.orgel.2024.107136

Sang Youn Lee , Chun Sakong , Byeong-Kwon Ju , Kwan Hyun Cho

{"title":"Enhancing the reliability of InP-based QD color conversion layer through a uniform organic encapsulation layer via inkjet printing","authors":"Sang Youn Lee , Chun Sakong , Byeong-Kwon Ju , Kwan Hyun Cho","doi":"10.1016/j.orgel.2024.107136","DOIUrl":"10.1016/j.orgel.2024.107136","url":null,"abstract":"<div>Quantum dot (QD) as a color conversion layer (CCL) is gaining increasing attention for use in next generation displays. However, QD CCL, especially those based on indium phosphide (InP) materials, are vulnerable to oxygen and moisture. Accordingly, even in CCL technology, encapsulation is essential to mitigate performance reduction due to the degradation of color conversion efficiency (CCE). Herein, we employed only acrylic-based resin to produce a uniform encapsulation layer on a CCL, enhancing the CCE reliability of the QD CCL under ambient conditions. To print a uniform encapsulation layer, we confirmed the significance of the minimized surface energy differences on glass, bank, and QD film through O2 plasma treatment. We also investigated coating characteristics through adjustment of the drop spacing to analyze the reliability of the CCL. Compared to the CCL without an encapsulation layer, the CCE only showed a decrease of 1.96 % at green and 3.6 % at red light, after 168 h. The T95 (time to 95 % of the initial luminance) was improved from 5.25 h to 75.02 h by applying the encapsulation layer. As a result, we enhanced the stability of the InP-based QD CCL by printing only an organic encapsulation layer using the inkjet printing process.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107136"},"PeriodicalIF":2.7,"publicationDate":"2024-09-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142229830","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

Tunable distributed Bragg reflector developed by magnetron sputtering to improve the power conversion efficiency of transparent IR cells for solar energy harvesting applications 利用磁控溅射技术开发的可调分布式布拉格反射器可提高太阳能收集应用中透明红外电池的功率转换效率

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-09-06 DOI: 10.1016/j.orgel.2024.107106

Rocío Ortiz , Marina Richet , Noella Lemaitre , Eva Gutiérrez

{"title":"Tunable distributed Bragg reflector developed by magnetron sputtering to improve the power conversion efficiency of transparent IR cells for solar energy harvesting applications","authors":"Rocío Ortiz , Marina Richet , Noella Lemaitre , Eva Gutiérrez","doi":"10.1016/j.orgel.2024.107106","DOIUrl":"10.1016/j.orgel.2024.107106","url":null,"abstract":"<div>Transparent organic photovoltaic (TOPV) cells integrated into windows are key to reducing the carbon dioxide emissions associated with the building sector. However, TOPV cells that reach a compromise between efficiency and transparency must still be developed. In addition, to implement this technology in glass production companies, the materials and processes used in TOPV cell development must be compatible with producing these devices on an industrial scale. Here, an infrared (IR) cell combining a PC60BM-based active material, ITO/ZnO as the back transparent electrode, PEDOT:PSS and ITO or Ag as the top transparent electrode, and a DBR as an antireflective coating was developed and applied on 625 mm2 glass samples. The structure of the DBR based on titanium dioxide (TiO2) and silicon dioxide (SiO2) monolayers was adjusted to the IR cell absorption spectra to reach a power conversion efficiency (PCE) of 5 and 4.3, and an average visible transmission (AVT) of 41 % and 51 % for ITO and Ag top electrodes, respectively. The manufacturing route of these devices involved commercial polymers and coatings that can be deposited by technologies already applied in the glass industry, such as magnetron sputtering or thermal evaporation. Therefore, the IR cells developed here showed a good compromise between efficiency, transparency, and large-scale production manufacturability.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"135 ","pages":"Article 107106"},"PeriodicalIF":2.7,"publicationDate":"2024-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142164641","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

Design and performance of sulfur and selenium-substituted triarylboron D3-A TADF emitters for OLED applications 用于 OLED 应用的硫和硒取代三芳基硼 D3-A TADF 发射器的设计与性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-31 DOI: 10.1016/j.orgel.2024.107130

Oguzhan Karakurt , Elif Fatma Demirgezer , Murat Dastemir , Semih Can Cakmaktepe , Hector Miranda-Salinas , Erkan Aksoy , Andrew Danos , Andrew Monkman , Erol Yildirim , Ali Cirpan

{"title":"Design and performance of sulfur and selenium-substituted triarylboron D3-A TADF emitters for OLED applications","authors":"Oguzhan Karakurt , Elif Fatma Demirgezer , Murat Dastemir , Semih Can Cakmaktepe , Hector Miranda-Salinas , Erkan Aksoy , Andrew Danos , Andrew Monkman , Erol Yildirim , Ali Cirpan","doi":"10.1016/j.orgel.2024.107130","DOIUrl":"10.1016/j.orgel.2024.107130","url":null,"abstract":"<div>This study presents the design, synthesis, and comprehensive theoretical and photophysical analysis of two new D3-A type thermally activated delayed fluorescence (TADF) emitters for organic light-emitting diode (OLED) applications. Utilizing a triarylboron core as the electron-accepting group and phenothiazine (PTZ) or phenoselenazine (PSZ) as electron-donating units, the molecules BTP-S and BTP-Se were developed. The D3-A structure supports the separation of frontier molecular orbitals (FMOs), leading to minimized singlet-triplet energy gaps (ΔEST), which are crucial for the TADF mechanism. Density functional theory (DFT) calculations presented that BTP-S and BTP-Se exhibit band gaps (Eg) of 2.52 and 3.23 eV, respectively, with BTP-S showing an ΔEST value as low as 0.007 eV for the S1-T1 transition at the lowest energy conformation. Photophysical studies revealed high photoluminescence quantum yields (PLQYs) for both compounds, with BTP-S achieving up to 85 % in mCP films and BTP-Se up to 59 %. In vacuum-processed OLEDs, BTP-S achieved a maximum external quantum efficiency (EQE) of 25.3 %, a current efficiency (ηc) of 195.8 cd/A, and a maximum luminance (Lmax) of 17356 cd/m2, while BTP-Se reached an EQE of 7.5 %, an ηc of 132.19 cd/A, and an Lmax of 16826 cd/m2 likely limited by the contributions of a folded-donor conformer enabled by the Se substitution. These findings underscore the impact of donor unit selection and conformation on the TADF characteristics, and provide valuable insights for designing high-performance OLED materials.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"134 ","pages":"Article 107130"},"PeriodicalIF":2.7,"publicationDate":"2024-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142117721","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

Near-infrared TADF-type organic afterglow materials 近红外 TADF 型有机余辉材料

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2024-08-30 DOI: 10.1016/j.orgel.2024.107128

Zi Ye , Jiuyang Li , Xun Li, Guangming Wang, Kaka Zhang

{"title":"Near-infrared TADF-type organic afterglow materials","authors":"Zi Ye , Jiuyang Li , Xun Li, Guangming Wang, Kaka Zhang","doi":"10.1016/j.orgel.2024.107128","DOIUrl":"10.1016/j.orgel.2024.107128","url":null,"abstract":"<div>Because of the energy gap law, as well as the spin-forbidden nature of triplet formation and transformation, it remains formidable task to achieve efficient and long-lived organic afterglow materials with long emission wavelengths, especially in the near-infrared region, under ambient conditions. Here we incorporate TADF-type afterglow mechanism in dopant-matrix systems which features a moderate kRISC of 101-102 s−1 to harvest triplet energies, boost afterglow efficiency and maintain afterglow lifetime. Specifically, we design a series of boron difluoride curcuminoid (CurBF2) compounds to serve as luminescent dopants. Organic matrices of crystalline nature and with carbonyl groups are selected to suppress triplet quenching by their rigid microenvironment and populate triplet states via dipole effect developed in our group. The resultant dopant-matrix systems display near-infrared TADF-type organic afterglow with emission wavelength >700 nm, quantum yield around 10 % and afterglow lifetime >10 ms, which can function as deep-penetrating and background-independent bioimaging probes.</div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"134 ","pages":"Article 107128"},"PeriodicalIF":2.7,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142096819","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

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