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学者姓名：李福山
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Abstract ：
In the era of burgeoning information technology, ensuring the impregnable transmission of confidential information has emerged as a paramount global imperative. Traditional fluorescent encryption materials are limited in advanced encryption due to their visible properties under ultraviolet light, while improved stimulus-responsive encryption strategies are usually based on static information. Herein, we exploit a novel high-security encryption strategy using metal halides and perovskite quantum dots as invisible inks and developer, respectively. The decryption of the information is impervious to traditional decryption means, necessitating the possession of the appropriate quadruple key to accomplish the decryption process. This approach leverages the anion exchange mechanism between metal halides and perovskite quantum dots, thereby enabling a multilevel encryption system. Consequently, the strategy establishes a multitiered and multifaceted security framework, which has significant application potential in the protection of confidential information requiring a superior level of security and provides a novel encryption and decryption scheme in the field of information security.
Keyword ：
Anion exchange Anion exchange Dynamic encryption Dynamic encryption Informationsecurity Informationsecurity Multilevel encryption Multilevel encryption Perovskite quantum dot Perovskite quantum dot
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| GB/T 7714 | Lei, Longjie , Yang, Kaiyu , Liu, Yang et al. Anion Exchange-Induced Invisible Perovskite Encryption System with Time-Dependence for Confidential Information Security [J]. | ACS PHOTONICS , 2025 , 12 (5) : 2311-2317 . |
| MLA | Lei, Longjie et al. "Anion Exchange-Induced Invisible Perovskite Encryption System with Time-Dependence for Confidential Information Security" . | ACS PHOTONICS 12 . 5 (2025) : 2311-2317 . |
| APA | Lei, Longjie , Yang, Kaiyu , Liu, Yang , Zhang, Qingkai , Yu, Kuibao , Li, Fushan . Anion Exchange-Induced Invisible Perovskite Encryption System with Time-Dependence for Confidential Information Security . | ACS PHOTONICS , 2025 , 12 (5) , 2311-2317 . |
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Abstract ：
在我国统筹实施科教兴国战略、人才强国战略、创新驱动发展战略,以及一体推进教育发展、科技创新、人才培养政策的引领与驱动下,高校、企业与科研院所之间的协同育人机制已经从最初的倡议和试点阶段,逐渐迈向了落地实施和深入发展时期.科教融合与产教融合协同育人模式将得到进一步的深化,主要体现在培养主体的多元化、培养层次的提升、培养机制的优化以及培养方式的创新与升级等多个方面.以福州大学物理与信息工程学院为例,针对电子信息领域国家技术和人才战略需求,探索重点高校、头部企业和科研机构通过设立定制化专班、共建科研平台、面向头部企业定向就业、共同举办学术交流论坛、共建导师团队、共同评价培养质量等方式实施研究生培养,打造全要素融合研究生培养新范式,着力实现创新型高层次人才自主培养.
Keyword ：
产教融合 产教融合 校企联合专班 校企联合专班 研究生培养 研究生培养 科教融合 科教融合
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| GB/T 7714 | 杨晓丹 , 柯颖莹 , 郑志刚 et al. 全要素融合的研究生产学研协同培养机制构建研究 [J]. | 中国高校科技 , 2025 , (2) : 93-96 . |
| MLA | 杨晓丹 et al. "全要素融合的研究生产学研协同培养机制构建研究" . | 中国高校科技 2 (2025) : 93-96 . |
| APA | 杨晓丹 , 柯颖莹 , 郑志刚 , 魏金明 , 卢孝强 , 李福山 . 全要素融合的研究生产学研协同培养机制构建研究 . | 中国高校科技 , 2025 , (2) , 93-96 . |
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Quantum dot (QD) based light-emitting diode devices (QLEDs) attracted significant academic interest due to their outstanding color saturation and convenient solution-based manufacturing processes. Currently, the external quantum efficiency (EQE) of red, green, and blue QLEDs reached their own theoretical limits. However, there was still a common phenomenon of roll-off existed in QLEDs. In this work, QLEDs with an ultra low roll-off were realized via simple carrier injection regulation strategy in achieving carrier recombination balance and exhibited excellent repeatability. By modifying quantum dots and electron transport layer (ETL), the champion device with the peak EQE of 15.2 %, and a current efficiency (CE) of 63.4 cd/A was successfully fabricated, which were 1.9 and 2.0 times greater than those of the control devices, respectively. The devices delivered a peak brightness of 266,778 cd/m2, and the EQE remained at 15.0 % at a brightness of 50,000 cd/m2, staying above 14 % within the range of 3000 to 200,000 cd/m2. At a voltage of 10 V, the peak EQE of the optimized devices decreased by only 7.6 % when compared with their optimum value of EQEs, while the EQE of the control device declined by 26.6 %. Finally, analysis of 40 different batches of devices revealed an average EQE of 14.3 %, demonstrating that this strategy exhibited good repeatability. This approach provided a convenient means to regulate carrier injection and further elucidated the relationship between roll-off and carrier injection balance in QLEDs, proposing a strategy to enhance their performance and simultaneously mitigate roll-off.
Keyword ：
Low roll-off Low roll-off QLEDs QLEDs Quantum dots (QDs) Quantum dots (QDs) Repeatability Repeatability
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| GB/T 7714 | Chen, Ye , Yang, Zunxian , Wang, Jiaxiang et al. Dual optimization strategies to achieve low roll-off and stable quantum dot light-emitting diodes [J]. | OPTICAL MATERIALS , 2025 , 160 . |
| MLA | Chen, Ye et al. "Dual optimization strategies to achieve low roll-off and stable quantum dot light-emitting diodes" . | OPTICAL MATERIALS 160 (2025) . |
| APA | Chen, Ye , Yang, Zunxian , Wang, Jiaxiang , Zhang, Hui , Chen, Yue , Jiang, Xudong et al. Dual optimization strategies to achieve low roll-off and stable quantum dot light-emitting diodes . | OPTICAL MATERIALS , 2025 , 160 . |
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Anticounterfeiting technologies meet challenges in the Internet of Things era due to the rapidly growing volume of objects, their frequent connection with humans, and the accelerated advance of counterfeiting/cracking techniques. Here, we, inspired by biological fingerprints, present a simple anticounterfeiting system based on perovskite quantum dot (PQD) fingerprint physical unclonable function (FPUF) by cooperatively utilizing the spontaneous-phase separation of polymers and selective in situ synthesis PQDs as an entropy source. The FPUFs offer red, green, and blue full-color fingerprint identifiers and random three-dimensional (3D) morphology, which extends binary to multivalued encoding by tuning the perovskite and polymer components, enabling a high encoding capacity (about 108570000, far surpassing that of biometric fingerprints). The strategy is compatible with mainstream production techniques that are widely used in traditional low-cost printed anticounterfeiting labels including spray printing, stamping, writing, and laser printing, avoiding complicated fabrication. Macrographical patterns and micro/nanofingerprint patterns with multiscale-tailorable inter-ridge sizes can be fused into a single FPUF label, satisfying different levels of anticounterfeiting requirements. Furthermore, a smart fused scheme of enhanced deep learning and fingerprint characteristic comparison is leveraged, by which high-efficiency, high-accuracy authentication of our FPUFs is achieved even for the increasingly huge FPUF databases and imperfectly captured images from users.
Keyword ：
anticounterfeiting labels anticounterfeiting labels biomimeticfingerprint biomimeticfingerprint perovskite quantumdot perovskite quantumdot physical unclonablefunction physical unclonablefunction smart authentication system smart authentication system
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| GB/T 7714 | You, Kejia , Lin, Jiasong , Wang, Zhen et al. Biomimetic Fingerprint-like Unclonable Optical Anticounterfeiting System with Selectively In Situ-Synthesized Perovskite Quantum Dots Embedded in Spontaneous-Phase-Separated Polymers [J]. | ACS APPLIED MATERIALS & INTERFACES , 2025 , 17 (3) : 5254-5267 . |
| MLA | You, Kejia et al. "Biomimetic Fingerprint-like Unclonable Optical Anticounterfeiting System with Selectively In Situ-Synthesized Perovskite Quantum Dots Embedded in Spontaneous-Phase-Separated Polymers" . | ACS APPLIED MATERIALS & INTERFACES 17 . 3 (2025) : 5254-5267 . |
| APA | You, Kejia , Lin, Jiasong , Wang, Zhen , Jiang, Yi , Sun, Jiayu , Lin, Qinghong et al. Biomimetic Fingerprint-like Unclonable Optical Anticounterfeiting System with Selectively In Situ-Synthesized Perovskite Quantum Dots Embedded in Spontaneous-Phase-Separated Polymers . | ACS APPLIED MATERIALS & INTERFACES , 2025 , 17 (3) , 5254-5267 . |
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Direct photolithography is a feasible patterning technique that facilitates the creation of ultrafine full-color quantum dot (QD) arrays. However, the lithographic pixel size is primarily limited by the wavelength of ultraviolet (UV) light passing through the photomask. Here, we report an ingenious patterning strategy for circumventing pixel resolution limitations via a maskless photolithography, which can readily produce uniform submicrometer patterns (0.5 mu m using a 365 nm UV light). Monolayer photo-cross-linkers are nanoimprinted onto the QD layer to bridge the surface ligands between adjacent QDs under UV irradiation, thereby generating stable QD patterns after developing. More importantly, the molecularly thick photo-cross-linker weakens the electron injection ability and reduces the interface exciton quenching to improve the fluorescence lifetime. We have successfully fabricated high-performance QD light-emitting diodes (QLEDs) with a resolution of 25,400 pixels per inch. This study expands the toolbox for overcoming the diffraction limit of photolithography to achieve ultrahigh resolution QLEDs.
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| GB/T 7714 | Qie, Yuan , Hu, Hailong , Yu, Kuibao et al. Breaking the Ultraviolet Lithography Limit to Achieve Submicron Quantum Dot Light-Emitting Array Devices [J]. | ACS MATERIALS LETTERS , 2025 , 7 (4) : 1269-1274 . |
| MLA | Qie, Yuan et al. "Breaking the Ultraviolet Lithography Limit to Achieve Submicron Quantum Dot Light-Emitting Array Devices" . | ACS MATERIALS LETTERS 7 . 4 (2025) : 1269-1274 . |
| APA | Qie, Yuan , Hu, Hailong , Yu, Kuibao , Wu, Rui , Zhong, Chao , Li, Renjie et al. Breaking the Ultraviolet Lithography Limit to Achieve Submicron Quantum Dot Light-Emitting Array Devices . | ACS MATERIALS LETTERS , 2025 , 7 (4) , 1269-1274 . |
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Positive aging in quantum dot light-emitting diodes (QLEDs) is a common phenomenon, and its unpredictability is a serious problem for large size or high-resolution devices. In this work, the compact assembly of quantum dots (QDs) was realized by using Langmuir-Blodgett (LB) technology, and we propose a novel interactive mechanism for the positive aging of QLEDs based on the self-assembled QD film. We suggest that there is a quasi-monolayer phase between strictly solid phase and collapse during the LB process. The QD assembly states vary the external quantum efficiency (EQE) climbing process and the electroluminescent (EL) peak distribution during operation, as well as the aging rearrangement of QDs in the device. The tight alignment of QDs has low entropy and contributes to enhancing device stability. Our study contributes to the understanding of the origin of positive aging of QLEDs and holds potential for the practical application of QLEDs in displays.
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| GB/T 7714 | Zheng, Yueting , Luo, Chengyu , Hu, Hailong et al. Positive Aging in Quantum Dot Light-Emitting Diodes with Controllable Quantum Dot Assembly [J]. | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (12) : 2987-2995 . |
| MLA | Zheng, Yueting et al. "Positive Aging in Quantum Dot Light-Emitting Diodes with Controllable Quantum Dot Assembly" . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS 16 . 12 (2025) : 2987-2995 . |
| APA | Zheng, Yueting , Luo, Chengyu , Hu, Hailong , Guo, Tailiang , Li, Fushan . Positive Aging in Quantum Dot Light-Emitting Diodes with Controllable Quantum Dot Assembly . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (12) , 2987-2995 . |
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Colloidal quantum dot (CQD) near-infrared (NIR) upconversion devices (UCDs) can directly convert low-energy NIR light into higher energy visible light without the need for additional integrated circuits, which is advantageous for NIR sensing and imaging. However, the state-of-the-art CQD NIR upconverters still face challenges, including high turn-on voltage (V on), low photon-to-photon (p-p) upconversion efficiency, and low current on/off ratio, primarily due to inherent limitations in the device structure and operating mechanisms. In this work, we developed a CQD NIR UCD based on a hole-only injection mechanism. Our device effectively suppresses electron injection from the cathode without hindering hole injection from the anode. As a result, the dark current of the device is reduced to a low level, which is favorable for the balance of photogenerated carriers and injected charges. Furthermore, we employed a liquid-phase ligand-exchange process to treat the PbS CQD photosensitive layer (PSL), which enhances the uniformity and charge transport capability of PSL, further optimizing the utilization of photogenerated carriers. We achieved a record high current on/off ratio exceeding 3.5 x 105 for the CQD NIR UCD. Additionally, the device exhibits a high p-p upconversion efficiency of 12.8% and a low V on of 1.8 V.
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| GB/T 7714 | Pan, Youjiang , Wu, Chunyan , Hu, Hailong et al. High-Performance Quantum Dot Near-Infrared Upconversion Devices Based on the Hole-Only Injection Mechanidsm [J]. | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (2) : 618-626 . |
| MLA | Pan, Youjiang et al. "High-Performance Quantum Dot Near-Infrared Upconversion Devices Based on the Hole-Only Injection Mechanidsm" . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS 16 . 2 (2025) : 618-626 . |
| APA | Pan, Youjiang , Wu, Chunyan , Hu, Hailong , Guo, Tailiang , Yang, Guojian , Qian, Lei et al. High-Performance Quantum Dot Near-Infrared Upconversion Devices Based on the Hole-Only Injection Mechanidsm . | JOURNAL OF PHYSICAL CHEMISTRY LETTERS , 2025 , 16 (2) , 618-626 . |
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Perovskite quantum dots (PQDs) have emerged as promising candidates for next-generation high-quality lighting and high-definition displays due to their outstanding luminescence properties, characterized by a narrow emission spectrum and tunable color. However, during the purification process involving polar solvents, ligand detachment from the quantum dot surface often induces crystal defects, thereby compromising their long-term stability. Herein, the effects of various post-processing strategies on PQD performance are systematically explored, including the use of oleic acid (OA), didodecyldimethylammonium bromide (DDAB), and their combinations, alongside OA-assisted synthesis. Furthermore, a synergistic post-processing strategy based on DDAB-NaMeS (sodium methanesulfonate) is proposed to elucidate the mechanism of ligand reconstruction on the quantum dot surface during purification. The resulting PQDs demonstrated excellent stability over a storage period exceeding one month, and the corresponding Quantum Dots Light-Emitting Diodes (QLEDs) achieved a peak external quantum efficiency (EQE) of 9.82%, representing a 1.91-fold improvement over standard devices. These QLEDs exhibited exceptional optoelectronic performance, underscoring their potential for application in other sulfonic acid ligands and perovskite-based materials.
Keyword ：
ligand exchange ligand exchange light-emitting diodes light-emitting diodes perovskite quantum dots perovskite quantum dots post-treatment post-treatment surface reconstruction surface reconstruction
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| GB/T 7714 | Wang, Jiaxiang , Yang, Zunxian , Chen, Ye et al. Sulfonic Acid Ligands Promote Surface Reconstruction of Perovskite Quantum Dots for High-Performance Light-Emitting Diodes [J]. | ADVANCED OPTICAL MATERIALS , 2025 , 13 (8) . |
| MLA | Wang, Jiaxiang et al. "Sulfonic Acid Ligands Promote Surface Reconstruction of Perovskite Quantum Dots for High-Performance Light-Emitting Diodes" . | ADVANCED OPTICAL MATERIALS 13 . 8 (2025) . |
| APA | Wang, Jiaxiang , Yang, Zunxian , Chen, Ye , Zhang, Hui , Chen, Yue , Bai, Yuting et al. Sulfonic Acid Ligands Promote Surface Reconstruction of Perovskite Quantum Dots for High-Performance Light-Emitting Diodes . | ADVANCED OPTICAL MATERIALS , 2025 , 13 (8) . |
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State-of-the-art reservoir computing (RC) systems rely on preprocessed images as the input layer's signal source, lacking the capacity to directly identify physical targets. In this study, we develop a near-infrared sensor RC system tailored for direct physical target detection. This system integrates a lead sulfide quantum dots (PbS QDs)-based near-infrared sensor array, zinc oxide (ZnO)-based memristors, and peripheral circuits. The PbS QDs sensor array serves as the signal source of the input layer of the RC system, capturing image information through near-infrared light and converting it into a temporal signal that is input into a reservoir composed of ZnO memristors. Memristors exhibit robust resistance switching stability and synaptic characteristics, enabling superior reservoir state separation within RC systems. The results demonstrate that the recognition accuracy for 5 × 4 digital images exceeds 88 %. This system provides a promising way for the future development of intelligent infrared cameras and shows its potential in complex target recognition. © 2025 Elsevier B.V.
Keyword ：
Image coding Image coding Proximity sensors Proximity sensors
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| GB/T 7714 | Wu, Rui , Pan, Youjiang , Hu, Hailong et al. A near infrared sensing reservoir computing system for entity target recognition [J]. | Chemical Engineering Journal , 2025 , 514 . |
| MLA | Wu, Rui et al. "A near infrared sensing reservoir computing system for entity target recognition" . | Chemical Engineering Journal 514 (2025) . |
| APA | Wu, Rui , Pan, Youjiang , Hu, Hailong , Guo, Tailiang , Li, Fushan . A near infrared sensing reservoir computing system for entity target recognition . | Chemical Engineering Journal , 2025 , 514 . |
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显示器作为信息传递的载体,对于人们的生活、工作至关重要.随着信息时代的发展,人们对显示质量提出了更高要求,显示单元逐渐趋向于微小化,以满足信息交互的需要.在"元宇宙"和虚拟/增强现实(VR/AR)等新型概念与技术的推动下,微显示技术蓬勃发展.量子点作为微小的发光单元,具有独特的性能优势,包括高色纯度、高量子产率以及可调的发光峰等,其性能几乎不受发光单元尺寸的影响,是实现高性能微显示的有效途径.本文介绍了近年来量子点微显示技术的发展现状,包括图案化技术、全彩化技术以及图案化器件的性能研究和驱动策略,并讨论了其应用前景以及目前面临的主要挑战.本综述对量子点微显示技术研究具有一定的参考价值.
Keyword ：
全彩化技术 全彩化技术 图案化技术 图案化技术 微显示 微显示 量子点 量子点
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| GB/T 7714 | 钟超 , 胡海龙 , 郭太良 et al. 量子点微显示技术的发展与挑战(特邀) [J]. | 中国激光 , 2025 , 52 (5) : 193-212 . |
| MLA | 钟超 et al. "量子点微显示技术的发展与挑战(特邀)" . | 中国激光 52 . 5 (2025) : 193-212 . |
| APA | 钟超 , 胡海龙 , 郭太良 , 李福山 . 量子点微显示技术的发展与挑战(特邀) . | 中国激光 , 2025 , 52 (5) , 193-212 . |
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