Advanced Optical Materials最新文献_第4页

Revealing the Effect of Triplet–Triplet Annihilation Up-Conversion and Improving the Operational Lifetime by Exciton Management in Anthracene- and Pyrene-Based Blue Fluorescent OLEDs 揭示基于蒽基和比利牛斯基的蓝色荧光oled中三重-三重湮灭上转换和激子管理提高使用寿命的影响

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-10 DOI: 10.1002/adom.202403102

Jianhui Pan, Wei Liu, Lei Ying, Yue Yu, Xianfeng Qiao, Dezhi Yang, Yuguang Ma, Dongge Ma

{"title":"Revealing the Effect of Triplet–Triplet Annihilation Up-Conversion and Improving the Operational Lifetime by Exciton Management in Anthracene- and Pyrene-Based Blue Fluorescent OLEDs","authors":"Jianhui Pan, Wei Liu, Lei Ying, Yue Yu, Xianfeng Qiao, Dezhi Yang, Yuguang Ma, Dongge Ma","doi":"10.1002/adom.202403102","DOIUrl":"https://doi.org/10.1002/adom.202403102","url":null,"abstract":"Anthracene- and pyrene-based organic fluorescent molecules with hybridized local and charge-transfer (HLCT) process can achieve highly efficient exciton utilization through harvesting high-lying triplet (Tn, n ≥ 2) excitons via reverse intersystem crossing (hRISC) compared to conventional organic fluorescent molecules, but there exists a serious exciton loss caused by internal conversion (IC) from Tn to T1.Nowadays, the stability difference between anthracene- and pyrene-based HLCT materials in OLEDs is rarely understood. In this article, the aging properties of anthracene derivated PAC and pyrene derivated CPPCN in the fabricated blue fluorescent OLEDs are systematically studied through exciton dynamics theory, and transient electroluminance and impedance spectroscopy measurements. It's experimentally found that the triplet exciton loss caused by IC is responsible for the device degradation. Through doping fluorescent emitter and introducing triplet-triplet annihilation upconversion layers in emissive layer, the IC process is efficiently suppressed and the operational lifetime is enhanced by ≈5.2 and 16 times under the luminance of 1000 cd m−2 in PAC and CPPCN-based OLEDs, respectively. This work fully demonstrates the differences in the effects of anthracene and pyrene-based HLCT molecules on device stability, providing a basis for further improving the operational lifetime of blue fluorescent OLEDs based on HLCT molecules.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 11","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Reservoir Computing with All-Optical Non-Fading Memory in a Self-Pulsing Microresonator Network 在自脉冲微谐振器网络中利用全光无衰减存储器进行存储计算

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-10 DOI: 10.1002/adom.202403133

Alessio Lugnan, Stefano Biasi, Alessandro Foradori, Peter Bienstman, Lorenzo Pavesi

{"title":"Reservoir Computing with All-Optical Non-Fading Memory in a Self-Pulsing Microresonator Network","authors":"Alessio Lugnan, Stefano Biasi, Alessandro Foradori, Peter Bienstman, Lorenzo Pavesi","doi":"10.1002/adom.202403133","DOIUrl":"https://doi.org/10.1002/adom.202403133","url":null,"abstract":"Photonic neuromorphic computing may offer promising applications for a broad range of photonic sensors, including optical fiber sensors, to enhance their functionality while avoiding loss of information, energy consumption, and latency due to optical-electrical conversion. However, time-dependent sensor signals usually exhibit much slower timescales than photonic processors, which also generally lack energy-efficient long-term memory. To address this, a first implementation of physical reservoir computing with non-fading memory for multi-timescale signal processing is experimentally demonstrated. This is based on a fully passive network of 64 coupled silicon microring resonators. This compact photonic reservoir is capable of hosting energy-efficient nonlinear dynamics and multistability. It can process and retain input signal information for an extended duration, at least tens of microseconds. This reservoir computing system can learn to infer the timing of a single input pulse and the spike rate of an input spike train, even after a relatively long period following the end of the input excitation. This operation is demonstrated at two different timescales, with approximately a factor of 5 difference. This work presents a novel approach to extending the memory of photonic reservoir computing and its timescale of application.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 11","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202403133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143830959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Large Non-Resonant Infrared Optical Second Harmonic Generation in Bulk Crystals of Van der Waals Semiconductor, SnP2Se6 范德华半导体块状晶体中红外大非谐振二次谐波的产生，SnP2Se6

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-07 DOI: 10.1002/adom.202402649

Jadupati Nag, Saugata Sarker, Safdar Imam, Abishek Iyer, Michael J. Waters, Albert Suceava, James M. Rondinelli, Mercouri G. Kanatzidis, Venkatraman Gopalan

{"title":"Large Non-Resonant Infrared Optical Second Harmonic Generation in Bulk Crystals of Van der Waals Semiconductor, SnP2Se6","authors":"Jadupati Nag, Saugata Sarker, Safdar Imam, Abishek Iyer, Michael J. Waters, Albert Suceava, James M. Rondinelli, Mercouri G. Kanatzidis, Venkatraman Gopalan","doi":"10.1002/adom.202402649","DOIUrl":"https://doi.org/10.1002/adom.202402649","url":null,"abstract":"2D van der Waals (vdW) materials have emerged as a highly promising candidates for nonlinear optical (NLO) applications. This study presents the synthesis, comprehensive linear optical, and optical second harmonic generation (SHG) characterization of a novel 2D vdW semiconductor SnP2Se6 in its bulk single crystal form. It exhibits an indirect bandgap of ≈1.47 eV and an exceptional non-resonant SHG coefficient of d33 ∼ −222 ± 30 pm V−1 at a fundamental wavelength of 2 µm, which is ≈7 times larger than that of the commercial AgGaSe2 with a comparable bandgap. Density functional theory (DFT) calculations of the linear and nonlinear optical properties exhibit reasonable agreement with the experimental measurements, revealing the chemical origin of the enhanced properties. Moreover, SnP2Se6 can exhibit both type-I and type-II phase matching over a wide spectral range, fulfilling one of the key criteria for an ideal NLO crystal. These exceptional properties position SnP2Se6 as a highly promising candidate for NLO applications.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 9","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202402649","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Machine Learning Enabled LED Lighting Using Scattering Optics 机器学习使LED照明使用散射光学

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-06 DOI: 10.1002/adom.202402788

Gangyi Li, Yuan Liu, Hao Liang, Xihua Wang

{"title":"Machine Learning Enabled LED Lighting Using Scattering Optics","authors":"Gangyi Li, Yuan Liu, Hao Liang, Xihua Wang","doi":"10.1002/adom.202402788","DOIUrl":"https://doi.org/10.1002/adom.202402788","url":null,"abstract":"Illumination receives a great deal of attention as white light-emitting diodes become energy-efficient light sources in households and commercial buildings, on streets and highways, and at stadiums and construction sites. In general, lenses and mirrors are used to control the spatial distribution of white LED (WLED) light. Here, it is proposed to use an optical diffuser, the key device in scattering optics, to achieve a pre-defined WLED brightness distribution by nanocrystals and machine learning. Optical diffusers are typically used to create soft light (similar brightness from any angle of view), however, here the concentration of nanocrystals in a nanocomposite film (optical diffuser) to tune its optical property at different regions is altered. Machine learning is employed to achieve the inverse design of the optical diffuser pattern controlling the WLED brightness distribution, and this design task is beyond human capacities which are carried out using the brute force approach. In the end, several pre-defined WLED brightness distributions are demonstrated for showing the success of this efforts.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 9","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adom.202402788","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688654","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Exploring the Mystery of “Negative Thermal Quenching” in Cs3Cu2I5 Single-Crystal 探索Cs3Cu2I5单晶“负热猝灭”之谜

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-05 DOI: 10.1002/adom.202403194

Yusheng Ma, Haohang Song, Qian Yao, Xin Guan, Yanqi Zhang, Mingkang Yang, Xuesong Li, Xutang Tao

{"title":"Exploring the Mystery of “Negative Thermal Quenching” in Cs3Cu2I5 Single-Crystal","authors":"Yusheng Ma, Haohang Song, Qian Yao, Xin Guan, Yanqi Zhang, Mingkang Yang, Xuesong Li, Xutang Tao","doi":"10.1002/adom.202403194","DOIUrl":"https://doi.org/10.1002/adom.202403194","url":null,"abstract":"As a high-interest emerging effect, negative thermal quenching (NTQ) may bring revolutionary advances in luminescence. However, the reason for NTQ is still unclear, making it challenging to target design materials with such unique properties. Interestingly, it is found that the Cs3Cu2I5 single-crystals grown using the Bridgman and antisolvent methods exhibit the conventional thermal quenching, while the single-crystal grown by the aqueous solution method yet has the NTQ. This suggests that a specific structural change in the single crystals can be induced to produce NTQ, harboring the secrets of NTQs. It is found that the Cs3Cu2I5 single-crystal from the aqueous solution method has a more compact crystal structure, smaller Huang–Rhys factor, and a more considerable exciton binding energy than other methods. In this case, the structural distortion of Cs3Cu2I5 single-crystal after photoexcitation is limited at low temperatures, and consequently, the self-trapped exciton (STE) energy levels are incompletely formed. As the temperature increases, the STE energy levels gradually become fully formed, and their ability to trap electrons improves, resulting in the marvelous phenomenon of NTQ. This work provides a plausible mechanism for the mysterious NTQ and will guide the future design of NTQ materials.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 12","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861442","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dual-Wavelength Photosensitizer Based on Phthalocyanine Nanodots for Multifunctional Composites with Enhanced Photodynamic Antibacterial, Photothermal Performance, and UV Protection 基于酞菁纳米点的双波长光敏剂用于增强光动力抗菌、光热性能和紫外线防护的多功能复合材料

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-04 DOI: 10.1002/adom.202403212

Meng Ju, Changwu Zheng, Aiqin Hou, Kongliang Xie, Xiaoyue Han, Aiqin Gao

{"title":"Dual-Wavelength Photosensitizer Based on Phthalocyanine Nanodots for Multifunctional Composites with Enhanced Photodynamic Antibacterial, Photothermal Performance, and UV Protection","authors":"Meng Ju, Changwu Zheng, Aiqin Hou, Kongliang Xie, Xiaoyue Han, Aiqin Gao","doi":"10.1002/adom.202403212","DOIUrl":"https://doi.org/10.1002/adom.202403212","url":null,"abstract":"Designing efficient near-infrared photosensitive molecules and excellent photosensitive materials is a major challenge in the fields of photodynamic antibacterial and photothermal energy conversion. The Förster resonance energy transfer shows much promise for enhancing the photodynamic antibacterial property and photothermal performance. Herein, a novel water-soluble dual-band enhanced naphthylimide functionalized phthalocyanine photosensitizer is designed and synthesized. The designed dual-band enhanced photosensitizer, 2,9(10),16(17),23(24)-Tetrakis[N-Benzyl-N,N'-dimethyl-1-propanaminium-4-(N-hydroxyethyl)-1,8-naphthylimino] phthalocyanine Zinc(II) (NAPc-N), can self-assemble by the π–π stacking interactions to form nanodots with a size of ≈40–50 nm. Nanodot composites prepared using waterborne polyurethane (WPU), exhibit dual-wavelength photodynamic antibacterial at 440 and 680 nm irradiations, efficiently photothermal conversion, and excellent UV protection (UPF) performances. The produced singlet oxygen amount by NAPc-N shows tremendous enhancement in dual-wavelength irradiations. After 30 min under the blue and infrared lights, the antibacterial rate of NAPc-N against Staphylococcus aureus and Escherichia coli reaches 99.99%. The temperature of the NAPc-N composite can be heated up to 60 °C and the UPF value can be up to 128.23. These dual-wavelength enhanced photosensitizer nanodots hold significant potential for advanced photodynamic materials and biomaterials applications.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 12","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143861499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Iontronically Tunable Broadband Graded Index Films (Advanced Optical Materials 7/2025) 电子可调谐宽带渐变折射率薄膜（先进光学材料7/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-04 DOI: 10.1002/adom.202570064

Paolo Franceschini, Andrea Tognazzi, Virginia Maria Demartis, Luca Carletti, Evgenii Menshikov, Ivano Alessandri, Alfonso Carmelo Cino, Fabrizio Torricelli, Costantino De Angelis, Maria Antonietta Vincenti

引用次数: 0

Converting Perovskite Nanocrystals to PbS Quantum Dots Toward Short-Wave Infrared Photodetectors (Advanced Optical Materials 7/2025) 将钙钛矿纳米晶体转化为PbS量子点用于短波红外光电探测器（Advanced Optical Materials 7/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-04 DOI: 10.1002/adom.202570065

Wenjie Zhang, Fan Fang, Huaying Zhong, Lili Huang, Haodong Tang, Xi Chen, Junjie Hao, Lei Zhang, Leifeng Cao, Jun Tang, Keyu Zheng, Peter Müller-Buschbaum, Wei Chen

引用次数: 0

On-Chip Metasurface-Mediated MoTe2 Photodetector with Electrically Tunable Polarization-Sensitivity 具有电可调偏振灵敏度的片上超表面介导MoTe2光电探测器

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-04 DOI: 10.1002/adom.202402668

Ruizhi Li, Xinlei Zhang, Fan Zhong, Yuanfang Yu, Peidong Yan, Dangyuan Lei, Junpeng Lu, Zhenhua Ni

{"title":"On-Chip Metasurface-Mediated MoTe2 Photodetector with Electrically Tunable Polarization-Sensitivity","authors":"Ruizhi Li, Xinlei Zhang, Fan Zhong, Yuanfang Yu, Peidong Yan, Dangyuan Lei, Junpeng Lu, Zhenhua Ni","doi":"10.1002/adom.202402668","DOIUrl":"https://doi.org/10.1002/adom.202402668","url":null,"abstract":"Photodetectors with tunable polarization sensitivity play a significant role in decoding signals in optical communications, extracting polarization-encrypted information, and the environmental monitoring of polarization variations. Metasurfaces are widely used in polarized photodetectors, while the responses for different polarization incidences follow a determinable and consistent correspondence. In this paper, an electrically tunable polarization photodetector composed of MoTe2 and gold metasurface is proposed for on-chip polarization-sensitive near-infrared (900–1200 nm) detection. Through contact engineering and electro-tuning, highly-tunable Schottky barriers are achieved. This enables the modulation of photoelectric conversion via the excitation of surface plasmon polaritons, which in turn allows for continuous adjustment on the degree of linear polarization of a settled metasurface ranging from 0.2 to an ultimate value of 1.0. The results outline a paradigm to achieve a polarization-dependent electrically tunable response, which is promising for on-chip information processing in integrated optics.","PeriodicalId":116,"journal":{"name":"Advanced Optical Materials","volume":"13 9","pages":""},"PeriodicalIF":8.0,"publicationDate":"2025-03-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143688786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Discovery of Novel Iridium(III) Complex-Based Photofunctional Materials Using Excited-State Descriptors (Advanced Optical Materials 7/2025) 利用激发态描述子发现新型铱（III）配合物光功能材料（Advanced Optical Materials 7/2025）

IF 8 2区材料科学

Advanced Optical Materials Pub Date : 2025-03-04 DOI: 10.1002/adom.202570063

Chu Wang, Lin Liu, Wei Sun, Juanjuan Wang, Qing-Kai Li, Kai Feng, Bin Liao, Wei-Hai Fang, Xuebo Chen

引用次数: 0