Light-Science & Applications最新文献

Compositional engineering of phase-stable and highly efficient deep-red emitting phosphor for advanced plant lighting systems

Light-Science & Applications Pub Date : 2024-12-11 DOI: 10.1038/s41377-024-01679-9

Jianwei Qiao, Dehong Li, Qiufeng Shi, Haijie Guo, Ping Huang, Lei Wang

{"title":"Compositional engineering of phase-stable and highly efficient deep-red emitting phosphor for advanced plant lighting systems","authors":"Jianwei Qiao, Dehong Li, Qiufeng Shi, Haijie Guo, Ping Huang, Lei Wang","doi":"10.1038/s41377-024-01679-9","DOIUrl":"https://doi.org/10.1038/s41377-024-01679-9","url":null,"abstract":"Inorganic luminescent materials hold great promise for optoelectronic device applications, yet the limited efficiency and poor thermal stability of oxide-based deep-red emitting phosphors hinder the advancement of plant lighting technologies. Herein, a simple compositional engineering strategy is proposed to stabilize the phase, boost external quantum efficiency (EQE) and enhance thermal stability. The chemical modification of the PO4 tetrahedron in NaMgPO4:Eu by incorporating SiO4 lowers the formation energy, leading to the generation of pure olivine phase and increasing the EQE from 27% to 52%, setting a record for oxide deep-red phosphors. In parallel, the introduced deep defect level improves thermal stability at 150 °C from 62.5% to 85.4%. Besides, the excitation and emission peaks shifted to 440 nm and 675 nm, respectively, aligning precisely with the specific spectral absorption requirements of plant phytochromes. Moreover, the luminescent intensity showed nearly no decay after being exposed to 80% relative humidity and 80 oC for 6 h, and the pc-LED utilizing Na1.06MgP0.94Si0.06O4:Eu achieves a high output power of 780 mW at 300 mA. Our research demonstrates a facile method for optimizing the performance of inorganic luminescent materials and provides alternative solutions for low-cost plant lighting.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142804797","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unlocking high-performance near-infrared photodetection: polaron-assisted organic integer charge transfer hybrids

Light-Science & Applications Pub Date : 2024-12-09 DOI: 10.1038/s41377-024-01695-9

Muhammad Ahsan Iqbal, Xueqian Fang, Yasir Abbas, Xiaoliang Weng, Tingchao He, Yu-Jia Zeng

{"title":"Unlocking high-performance near-infrared photodetection: polaron-assisted organic integer charge transfer hybrids","authors":"Muhammad Ahsan Iqbal, Xueqian Fang, Yasir Abbas, Xiaoliang Weng, Tingchao He, Yu-Jia Zeng","doi":"10.1038/s41377-024-01695-9","DOIUrl":"https://doi.org/10.1038/s41377-024-01695-9","url":null,"abstract":"Room temperature femtowatt sensitivity remains a sought-after attribute, even among commercial inorganic infrared (IR) photodetectors (PDs). While organic IR PDs are poised to emerge as a pivotal sensor technology in the forthcoming Fourth-Generation Industrial Era, their performance lags behind that of their inorganic counterparts. This discrepancy primarily stems from poor external quantum efficiencies (EQE), driven by inadequate exciton dissociation (high exciton binding energy) within organic IR materials, exacerbated by pronounced non-radiative recombination at narrow bandgaps. Here, we unveil a high-performance organic Near-IR (NIR) PD via integer charge transfer between Poly[2,5-bis(3-tetradecylthiophen-2-yl)thieno[3,2-b]thiophene] (C-14PBTTT) donor (D) and Tetrafluorotetracyanoquinodimethane (TCNQF4) acceptor (A) molecules, showcasing strong low-energy subgap absorptions up to 2.5 µm. We observe that specifically, polaron excitation in these radical and neutral D-A blended molecules enables bound charges to exceed the Coulombic attraction to their counterions, leading to an elevated EQE (polaron absorption region) compared to Frenkel excitons. As a result, our devices achieve a high EQE of ∼107%, femtowatt sensitivity (NEP) of ~0.12 fW Hz-1/2 along a response time of ~81 ms, at room temperature for a wavelength of 1.0 µm. Our innovative utilization of polarons highlights their potential as alternatives to Frenkel excitons in high-performance organic IR PDs.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"82 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142793312","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A bright future for micro-LED displays

Light-Science & Applications Pub Date : 2024-12-06 DOI: 10.1038/s41377-024-01683-z

Vineeth K. Bandari, Oliver G. Schmidt

引用次数: 0

Advancing wavefront sensing: meta Shack-Hartmann sensor enhances phase imaging

Light-Science & Applications Pub Date : 2024-12-02 DOI: 10.1038/s41377-024-01646-4

Xiaoyuan Liu, Zihan Geng, Mu Ku Chen

引用次数: 0

Simultaneous achieving negative photoconductivity response and volatile resistive switching in Cs2CoCl4 single crystals towards artificial optoelectronic synapse

Light-Science & Applications Pub Date : 2024-12-02 DOI: 10.1038/s41377-024-01642-8

Huifang Jiang, Huifang Ji, Zhuangzhuang Ma, Dongwen Yang, Jingli Ma, Mengyao Zhang, Xu Li, Meng Wang, Ying Li, Xu Chen, Di Wu, Xinjian Li, Chongxin Shan, Zhifeng Shi

{"title":"Simultaneous achieving negative photoconductivity response and volatile resistive switching in Cs2CoCl4 single crystals towards artificial optoelectronic synapse","authors":"Huifang Jiang, Huifang Ji, Zhuangzhuang Ma, Dongwen Yang, Jingli Ma, Mengyao Zhang, Xu Li, Meng Wang, Ying Li, Xu Chen, Di Wu, Xinjian Li, Chongxin Shan, Zhifeng Shi","doi":"10.1038/s41377-024-01642-8","DOIUrl":"https://doi.org/10.1038/s41377-024-01642-8","url":null,"abstract":"The development of negative photoconductivity (NPC)-related devices is of great significance for numerous applications, such as optoelectronic detection, neuromorphic computing, and optoelectronic synapses. Here, an unusual but interesting NPC phenomenon in the novel cesium cobalt chlorine (Cs2CoCl4) single crystal-based optoelectronic devices is reported, which simultaneously possess volatile resistive switching (RS) memory behavior. Joint experiment−theory characterizations reveal that the NPC behavior is derived from the intrinsic vacancy defects of Cs2CoCl4, which could trap photogenerated charge carriers and produce an internal electric field opposite to the applied electric field. Such NPC effect enables an abnormal photodetection performance with a decrease in electrical conductivity to illumination. Also, a large specific detectivity of 2.7 × 1012 Jones and broadband NPC detection wavelength from 265 to 780 nm were achieved. In addition to the NPC response, the resulting devices demonstrate a volatile RS performance with a record-low electric field of 5 × 104 V m−1. By integrating the characteristics of electric-pulse enhancement from RS and light-pulse depression from NPC, an artificial optoelectronic synapse was successfully demonstrated, and based on the simulation of artificial neural network algorithm, the recognition application of handwritten digital images was realized. These pioneer findings are anticipated to contribute significantly to the practical advancement of metal halides in the fields of in-memory technologies and artificial intelligence.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142758449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A multiband NIR upconversion core-shell design for enhanced light harvesting of silicon solar cells 用于增强硅太阳能电池采光的多波段近红外上转换核壳设计

Light-Science & Applications Pub Date : 2024-11-25 DOI: 10.1038/s41377-024-01661-5

Yue Wang, Wen Xu, Haichun Liu, Yuhan Jing, Donglei Zhou, Yanan Ji, Jerker Widengren, Xue Bai, Hongwei Song

{"title":"A multiband NIR upconversion core-shell design for enhanced light harvesting of silicon solar cells","authors":"Yue Wang, Wen Xu, Haichun Liu, Yuhan Jing, Donglei Zhou, Yanan Ji, Jerker Widengren, Xue Bai, Hongwei Song","doi":"10.1038/s41377-024-01661-5","DOIUrl":"https://doi.org/10.1038/s41377-024-01661-5","url":null,"abstract":"Exploring lanthanide light upconversion (UC) has emerged as a promising strategy to enhance the near-infrared (NIR) responsive region of silicon solar cells (SSCs). However, its practical application under normal sunlight conditions has been hindered by the narrow NIR excitation bandwidth and the low UC efficiency of conventional materials. Here, we report the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion nanoparticles (Ln/Yb-UCNPs, Ln3+ = Ho3+, Er3+, Tm3+). In our design, Ln3+ ions are incorporated into distinct layers of Ln/Yb-UCNPs to function as near-infrared (NIR) absorbers across different spectral ranges. This design achieves broad multiband absorption withtin the 1100 to 2200 nm range, with an aggregated bandwidth of ~500 nm. We have identified a synthetic electron pumping (SEP) effect involving Yb3+ ions, facilitated by the synergistic interplay of energy transfer and cross-relaxation between Yb3+ and other ions Ln3+ (Ho3+, Er3+, Tm3+). This SEP effect enhances the UC efficiency of the nanomaterials by effectively transferring electrons from the low-excited states of Ln3+ to the excited state of Yb3+, resulting in intense Yb3+ luminescence at ~980 nm within the optimal response region for SSCs, thus markedly improving their overall performance. The SSCs integrated with Ln/Yb-UCNPs with multiband excitation demonstrate the largest reported NIR response range up to 2200 nm, while enabling the highest improvement in absolute photovoltaic efficiency reported, with an increase of 0.87% (resulting in a total efficiency of 19.37%) under standard AM 1.5 G irradiation. Our work tackles the bottlenecks in UCNP-coupled SSCs and introduces a viable approach to extend the NIR response of SSCs.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"7 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142696880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-shot single-beam coherent Raman scattering thermometry based on optically induced air lasing 基于光诱导空气激光的单光束相干拉曼散射测温技术

Light-Science & Applications Pub Date : 2024-11-25 DOI: 10.1038/s41377-024-01598-9

Xu Lu, Yewei Chen, Francesco Mazza, Siyi He, Zihan Li, Shunlin Huang, Quanjun Wang, Ning Zhang, Bo Shen, Yuzhu Wu, Jinping Yao, Ya Cheng

引用次数: 0

Topological protection of optical skyrmions through complex media 穿过复杂介质的光学天幕的拓扑保护

Light-Science & Applications Pub Date : 2024-11-22 DOI: 10.1038/s41377-024-01659-z

An Aloysius Wang, Zimo Zhao, Yifei Ma, Yuxi Cai, Runchen Zhang, Xiaoyi Shang, Yunqi Zhang, Ji Qin, Zhi-Kai Pong, Tádé Marozsák, Binguo Chen, Honghui He, Lin Luo, Martin J. Booth, Steve J. Elston, Stephen M. Morris, Chao He

{"title":"Topological protection of optical skyrmions through complex media","authors":"An Aloysius Wang, Zimo Zhao, Yifei Ma, Yuxi Cai, Runchen Zhang, Xiaoyi Shang, Yunqi Zhang, Ji Qin, Zhi-Kai Pong, Tádé Marozsák, Binguo Chen, Honghui He, Lin Luo, Martin J. Booth, Steve J. Elston, Stephen M. Morris, Chao He","doi":"10.1038/s41377-024-01659-z","DOIUrl":"https://doi.org/10.1038/s41377-024-01659-z","url":null,"abstract":"Optical Skyrmions have many important properties that make them ideal units for high-density data applications, including the ability to carry digital information through a discrete topological number and the independence of spatially varying polarization to other dimensions. More importantly, the topological nature of the optical Skyrmion heuristically suggests a strong degree of robustness to perturbations, which is crucial for reliably carrying information in noisy environments. However, the study of the topological robustness of optical Skyrmions is still in its infancy. Here, we quantify this robustness precisely by proving that the topological nature of the Skyrmion arises from its structure on the boundary and, by duality, is resilient to spatially varying perturbations provided they respect the relevant boundary conditions of the unperturbed Skyrmion. We then present experimental evidence validating this robustness in the context of paraxial Skyrmion beams against complex polarization aberrations. Our work provides a framework for handling various perturbations of Skyrmion fields and offers guarantees of robustness in a general sense. This, in turn, has implications for applications of the Skyrmion where their topological nature is exploited explicitly, and, in particular, provides an underpinning for the use of optical Skyrmions in communications and computing.","PeriodicalId":18069,"journal":{"name":"Light-Science & Applications","volume":"180 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-11-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142684323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The brightest multi-colour phonon lasers 最亮的多色声子激光器

Light-Science & Applications Pub Date : 2024-11-13 DOI: 10.1038/s41377-024-01648-2

Mishkat Bhattacharya

引用次数: 0

Innovative CQD detector for broadband multispectral imaging 用于宽带多光谱成像的创新型 CQD 探测器

Light-Science & Applications Pub Date : 2024-11-12 DOI: 10.1038/s41377-024-01621-z

Shengli Sun, Yaran Li, Fansheng Chen

引用次数: 0