Organic Electronics最新文献_第7页

Selection of compatible blended cohost towards boosting performance of TADF-polymer light-emitting electrochemical cells 选择相容混合共宿主提高tadf -聚合物发光电化学电池的性能

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-10 DOI: 10.1016/j.orgel.2025.107252

Mei Chen , Jinchang Ye , Jiantian Lu , Sihua Wu , Guanrong Lin , Yingming Ma , Lihui Liu , Yuwei Zhang , Li Niu , Baohua Zhang

{"title":"Selection of compatible blended cohost towards boosting performance of TADF-polymer light-emitting electrochemical cells","authors":"Mei Chen , Jinchang Ye , Jiantian Lu , Sihua Wu , Guanrong Lin , Yingming Ma , Lihui Liu , Yuwei Zhang , Li Niu , Baohua Zhang","doi":"10.1016/j.orgel.2025.107252","DOIUrl":"10.1016/j.orgel.2025.107252","url":null,"abstract":"<div><div>Light-emitting electrochemical cells (LECs) using thermally activated delayed fluorescent (TADF) polymer emitter are attractive since they own the great potential in fabricating robust LECs with low-cost and high efficiencies towards various applications. However, current scarce study disclosed that it is hard to simultaneous optimize electrochemical doping and multi-component miscibility of the emissive layer, which renders luminance and external quantum efficiency (EQE) of TADF-polymer LECs still quite low, e.g. less than 500 cd m<sup>−2</sup> and 1.0 %. Here, we propose to select compatible p-type and n-type small molecules as cohost of TADF-polymer emitter, which is critical to simultaneously achieve balanced, efficient p-/n-type electrochemical doping and charge transport, efficient energy transfer from cohost to TADF-polymer emitter and most importantly well restrained intra- and inter-molecular interactions, i.e. self-aggregation of host and redshift effect of host on TADF-polymer emitter. TADF-polymer LEC using such a qualified compatible cohost achieved a peak luminance of 1292 cd m<sup>−2</sup>, a peak EQE of 2.24 %, and a peak luminous efficiency of 6.89 cd A<sup>−1</sup> at 6.5 V, which is distinctly superior to that of control devices and earlier report of TADF-polymer LECs. It proves the effectiveness of such strategy and provides a research thought on further developments.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107252"},"PeriodicalIF":2.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815614","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 of non-Aufbau organic radicals based on TTM/TTBrM core 基于TTM/TTBrM核心的非aufbau有机自由基设计

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-04-03 DOI: 10.1016/j.orgel.2025.107248

Ying Gao , Yong Wu , Bo Ren , Yan Li

{"title":"Design of non-Aufbau organic radicals based on TTM/TTBrM core","authors":"Ying Gao , Yong Wu , Bo Ren , Yan Li","doi":"10.1016/j.orgel.2025.107248","DOIUrl":"10.1016/j.orgel.2025.107248","url":null,"abstract":"<div><div>Non-Aufbau organic radicals with SOMO-HOMO inversion (SHI) have been attracting significant interest from both theoretical and experimental perspectives. The unusual orbital ordering in these systems makes their electronic properties apart from the more common case, where the unpaired electron is filled in the SOMO which is higher in energy than HOMO. In this work, we designed a series of radical systems based on well-known TTM/TTBrM core, functionalized by various electron donor groups (PDMAC, PPTA, PPXZ, BFCz, PA and PT) to achieve SHI-type radicals. Using density functional theory, it was demonstrated that these electron donor groups can modulate the order of SOMO and HOMO, and all radical systems follow the general illustration of SHI that the α-HOMO pair of matching spin orbitals is higher in energy than the SOMO, and is below the corresponding SUMO in non-Aufbau electronic structures. Moreover, all radical systems exhibit fluorescence radiative rate (<em>k</em><sub>r</sub>) approaching approximately 10<sup>7</sup> s<sup>−1</sup>. Ab Initio Molecular Dynamics (AIMD) simulation further indicates that all radical systems are stable at high temperatures. Our calculated results show that the formation of SHI-type radical systems is related to the nature of electron donor units. Consequently, PDMAC, PPTA, PPXZ, BFCz, PA, and PT are reliable choices for designing SHI-type radical emitters. Our work thus establishes molecular guidelines for designing SHI-type radical systems and expands their applicability to organic light-emitting diode emitters.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107248"},"PeriodicalIF":2.7,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143800140","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

Optimizing performance and durability of perovskite light-emitting diodes through crystal grain manipulation and defect mitigation 通过晶粒控制和缺陷缓解优化钙钛矿发光二极管的性能和耐久性

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-28 DOI: 10.1016/j.orgel.2025.107249

Jiaming Yu , Youqiang Zhuge , Jincheng Lou , Taifei Zhou , Yiying Tan , Yachun Guo , Shuguang Zhang , Junbiao Peng

{"title":"Optimizing performance and durability of perovskite light-emitting diodes through crystal grain manipulation and defect mitigation","authors":"Jiaming Yu , Youqiang Zhuge , Jincheng Lou , Taifei Zhou , Yiying Tan , Yachun Guo , Shuguang Zhang , Junbiao Peng","doi":"10.1016/j.orgel.2025.107249","DOIUrl":"10.1016/j.orgel.2025.107249","url":null,"abstract":"<div><div>Recent advancements in quasi-two-dimensional perovskite light-emitting diodes (PeLEDs) have garnered significant attention due to their attractive properties, including facile solution processability, tunable emission spectra, and cost effectiveness. However, a critical challenge hindering their performance remains the quality of the perovskite emitting layer. Morphological and structural imperfections such as pinholes and halide vacancies, can significantly impede the subsequent layer deposition, leading to the formation of leakage current pathways. Furthermore, these lattice defects often serve as non-radiative recombination centers, compromising the device's overall luminescence efficiency. This study presents a facile strategy to address these limitations by incorporating polyethylene oxide (PEO) and trimethylolpropane triacrylate (TMPTA) as additives within the perovskite precursor solution. The high viscosity of PEO effectively restricts the diffusion of perovskite precursor, leading to the formation of smaller and more uniform crystal grains. In addition, the C=O functional group in TMPTA interacts favorably with uncoordinated Pb<sup>2+</sup> cations in perovskite, thereby suppressing non-radiative recombination processes. By meticulously optimizing the volume ratio of PEO and TMPTA additives, effective passivation of perovskite film defects and manipulation of crystal grain morphology are achieved, leading to a significant enhancement of the perovskite emitting layer quality. Consequently, the maximum current efficiency and external quantum efficiency of green light-emitting diodes reach 45.3 cd/A and 12.01 %, respectively. This work establishes a simple and effective methodology for fabricating efficient and stable PeLEDs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107249"},"PeriodicalIF":2.7,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739061","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

Revealing the memory effect in phototransistors with vertical phase separation of conjugated/insulating polymer blends through film-on-water interface self-assembly 通过水膜界面自组装揭示共轭/绝缘聚合物共混物垂直相分离在光电晶体管中的记忆效应

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-26 DOI: 10.1016/j.orgel.2025.107230

Yan-Ting Chen , You-Wei Cao , Yu-Chih Hsu , Yan-Cheng Lin , Yang-Yen Yu

{"title":"Revealing the memory effect in phototransistors with vertical phase separation of conjugated/insulating polymer blends through film-on-water interface self-assembly","authors":"Yan-Ting Chen , You-Wei Cao , Yu-Chih Hsu , Yan-Cheng Lin , Yang-Yen Yu","doi":"10.1016/j.orgel.2025.107230","DOIUrl":"10.1016/j.orgel.2025.107230","url":null,"abstract":"<div><div>This study utilizes a blend of poly (3-hexylthiophene) (P3HT) and poly (1-pyrenemethyl methacrylate) (PPyMA) polymers to achieve vertical phase separation through air/liquid interface self-assembly. Due to the surface energy mismatch of these blends, a bilayer structure is formed between the conjugated and insulating polymers. The blended thin films are applied to phototransistor memory devices, with PPyMA as a photoactive electret and P3HT as a semiconductor channel. A comparative study of the two-transfer direction water side (forward structure) and air side (reverse structure) reveals that the vertical phase separation morphology of the aromatic side groups in PPyMA, along with its conjugation, is closely related to the photoresponse, memory retention, and durability of the photomemory devices. Electrical analysis shows that the device fabricated with the forward transfer (P3HT/PPyMA) can achieve photo writing through exposure to ultraviolet light at 265 nm, 310 nm, 365 nm, and blue light at 455 nm, while electrical erasure is performed via gate bias, resulting in a wide memory window (∼48.7 V). The device also exhibits a stable memory ratio in repeated write/erase measurements and long-term stability exceeding 10<sup>4</sup> s. In contrast, the device fabricated with the reverse transfer (PPyMA/P3HT), due to the reverse bilayer structure, required hole injection to pass through the insulating PPyMA layer, and holes may recombine with stored electrons during vertical transport, thereby dismissing the memory mechanism. As a result, the device cannot effectively store charges to achieve memory retention. This study demonstrates vertical phase separation through air/liquid interface self-assembly and reveals the photoresponse and charge storage mechanisms of photomemory devices.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107230"},"PeriodicalIF":2.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143768617","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

An artificial synapse based on organic heterojunction of conducting polymer and molecular ferroelectrics 基于导电聚合物与铁电分子有机异质结的人工突触

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-26 DOI: 10.1016/j.orgel.2025.107242

Zimu Li , Chunli Jiang , Chunhua Luo , Hechun Lin , Xiaodong Tang , Hui Peng

{"title":"An artificial synapse based on organic heterojunction of conducting polymer and molecular ferroelectrics","authors":"Zimu Li , Chunli Jiang , Chunhua Luo , Hechun Lin , Xiaodong Tang , Hui Peng","doi":"10.1016/j.orgel.2025.107242","DOIUrl":"10.1016/j.orgel.2025.107242","url":null,"abstract":"<div><div>To address the challenges posed by the rapid development of artificial intelligence and big data, various artificial synaptic devices have been developed to overcome the limitations of traditional computing systems. In this study, a two-terminal device using a conducting polymer, poly(hexylthiophene) (P3HT), and a molecular ferroelectric, diisopropylammonium bromide (DIPAB), is fabricated. The incorporation of the ferroelectric layer not only establishes an energy barrier for charge carriers generated by light pulses in the P3HT layer but also allows the device's response to be modulated by altering the ferroelectric polarization state of DIPAB. This device successfully simulates some basic biological synaptic functions by modulating light stimuli. Furthermore, the light logic functions of “AND” and “OR” are realized by using light pulses with different wavelengths, as well as the simulation of associative learning. The device is used to recognize MNIST handwritten digits based on a convolutional neural network (CNN), achieving a recognition accuracy of over 90 %. These results highlight the device's potential for neuromorphic computing.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107242"},"PeriodicalIF":2.7,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739062","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

Low-voltage RGB perovskite light-emitting transistors with magnetron sputtered Ta2O5 high-k dielectric layer 具有磁控溅射Ta2O5高k介电层的低压RGB钙钛矿发光晶体管

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-24 DOI: 10.1016/j.orgel.2025.107241

Xingyu Zhang, Min Guo, Jia Li, Tingting Dai, Zihong Yang, Zhidong Lou, Yanbing Hou, Feng Teng, Yufeng Hu

{"title":"Low-voltage RGB perovskite light-emitting transistors with magnetron sputtered Ta2O5 high-k dielectric layer","authors":"Xingyu Zhang, Min Guo, Jia Li, Tingting Dai, Zihong Yang, Zhidong Lou, Yanbing Hou, Feng Teng, Yufeng Hu","doi":"10.1016/j.orgel.2025.107241","DOIUrl":"10.1016/j.orgel.2025.107241","url":null,"abstract":"<div><div>Perovskite light-emitting transistors (PeLETs) represent an emerging class of optoelectronic devices that integrate the exceptional light-emission capabilities of perovskite light-emitting diodes (PeLEDs) with the efficient charge transport properties of field-effect transistors (FETs). This integration facilitates simplified fabrication, enhanced current densities, and stable charge mobility, making PeLETs highly promising for advanced display applications. Low-voltage operation and full-color emission are the primary challenges in achieving high-performance PeLETs. In this work, a PeLET structure that operates at 5 V is designed using a magnetron-sputtered Ta<sub>2</sub>O<sub>5</sub> high-k dielectric layer. The influence of the hole transport layer's energy level structure and mobility on the performance of the light-emitting transistor is investigated. By tuning the perovskite bandgap, the PeLETs with emission in the red, green, and blue spectral regions have been achieved. The optimized red-, green-, and blue-emitting PeLETs exhibit charge carrier mobilities of 0.41 cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup>, 1.00 cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup>, and 0.51 cm<sup>2</sup>V<sup>−1</sup>s<sup>−1</sup>, with corresponding threshold voltages of 0.27 V, 0.64 V, and 0.46 V, respectively. This work advances the development of PeLETs by demonstrating a multilayer device architecture that enhances charge carrier dynamics and expands emission tunability. These findings provide a promising path toward low-voltage PeLETs for next-generation display technologies.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"142 ","pages":"Article 107241"},"PeriodicalIF":2.7,"publicationDate":"2025-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143724226","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

TADF and hyperfluorescence: Pushing the frontiers of organic optoelectronics TADF和高荧光：推动有机光电子学的前沿

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-19 DOI: 10.1016/j.orgel.2025.107240

Chihaya Adachi, Lian Duan

引用次数: 0

Red thermally activated delayed fluorescence materials for high-performance organic light-emitting diode 高性能有机发光二极管用红色热激活延迟荧光材料

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-11 DOI: 10.1016/j.orgel.2025.107238

Jiaxuan Wang , Chao Jiang , Chi Cao , Xuming Zhuang , Baoyan Liang , Yue Wang , Hai Bi

{"title":"Red thermally activated delayed fluorescence materials for high-performance organic light-emitting diode","authors":"Jiaxuan Wang , Chao Jiang , Chi Cao , Xuming Zhuang , Baoyan Liang , Yue Wang , Hai Bi","doi":"10.1016/j.orgel.2025.107238","DOIUrl":"10.1016/j.orgel.2025.107238","url":null,"abstract":"<div><div>Developing red thermally activated delayed fluorescence (TADF) materials is challenging but crucial for realizing full-color displays and solid-state lighting systems. In this work, we propose a novel design strategy that connects two emitting units to a phenyl ring to create efficient red luminescent materials. Two D-A-π-A-D type TADF molecules with mild-twist structures, <em>m</em>-DTPAQCN and <em>p</em>-DTPAQCN, were designed and synthesized. These molecules incorporate an electron-withdrawing acceptor of quinoxaline-6,7-dicarbonitrile group and an electron-donating donor of triphenylamine group. Both <em>m</em>-DTPAQCN and <em>p</em>-DTPAQCN exhibit red emissions in toluene solutions at 607 nm and 614 nm, respectively, and in doped films at 618 nm and 627 nm. The doped films, prepared with varying doping concentrations, demonstrate excellent photoluminescence quantum yields (PLQYs) ranging from 60.10 % to 84.70 %. The corresponding organic light-emitting diodes (OLEDs) employing <em>m</em>-DTPAQCN and <em>p</em>-DTPAQCN as emitters present efficient red electroluminescence with a maximum external quantum efficiency of 17.37 % and 20.05 %, respectively. This work provides a new and effective strategy for designing efficient red TADF molecules, offering significant potential for application in OLEDs.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"141 ","pages":"Article 107238"},"PeriodicalIF":2.7,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619121","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

Performance improvement of ZnO nanorod arrays / ZnO quantum dots / P3HT hybrid photodetector by Au nanoparticles 金纳米颗粒对ZnO纳米棒阵列/ ZnO量子点/ P3HT混合光电探测器性能的改善

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-11 DOI: 10.1016/j.orgel.2025.107239

Taotao Rao , Qian Qiao , Jun Zhou , Jian Zheng , Xuan Yu , Xiaoming Yu , Cunxi Zhang , Rui Wang

引用次数: 0

Study on the influence of hole transport materials on the response speed of organic photodetectors by time-of-flight technique 利用飞行时间技术研究空穴传输材料对有机光电探测器响应速度的影响

IF 2.7 4区工程技术

Organic Electronics Pub Date : 2025-03-08 DOI: 10.1016/j.orgel.2025.107237

Jinghao Fu, Dezhi Yang, Ji Li, Guo He, Dechao Guo, Rentao Dong, Dongge Ma

{"title":"Study on the influence of hole transport materials on the response speed of organic photodetectors by time-of-flight technique","authors":"Jinghao Fu, Dezhi Yang, Ji Li, Guo He, Dechao Guo, Rentao Dong, Dongge Ma","doi":"10.1016/j.orgel.2025.107237","DOIUrl":"10.1016/j.orgel.2025.107237","url":null,"abstract":"<div><div>Organic photodetectors (OPDs) offer some advantages, including flexibility, cost-effectiveness, wavelength tunability, and lightweight, making them compelling alternatives to inorganic photodetectors across numerous applications. However, the low charge carrier mobility of organic semiconductors greatly limits the response speed of OPDs, which remains a significant challenge to further enhance the response speed of these devices to meet the demands of communication and other fields. Previous studies have mainly focused on the efforts to enhance the response speed, but the relationship between response speed and charge carrier transport characteristics has been rarely explored. In this study, we employ the time-of-flight technique to investigate the mobility characteristics of different hole transport layer materials, MCBP and TCTA, and their impact on response speed of the resulting OPDs. The OPD utilizing TCTA as the hole transport layer has achieved a -3dB bandwidth of up to 85 MHz. Compared with MCBP with higher mobility, the stronger transport dispersion of TCTA makes it a more suitable choice for fast-response OPDs, suggesting that the response speed is not solely determined by the mobility of charge carrier transport layer materials.</div></div>","PeriodicalId":399,"journal":{"name":"Organic Electronics","volume":"141 ","pages":"Article 107237"},"PeriodicalIF":2.7,"publicationDate":"2025-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619122","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