OPTICAL MATERIALS
·
2025
·
IF 4.2
Haotian Gu,Tenglong Sun,Yining Feng,Muzhi Cai,Jintian Tang,Shiqing Xu
Tin-based perovskite light-emitting diodes (PeLEDs) have emerged as promising candidates for future optoelectronic applications due to their non-toxic properties. However, their electroluminescence (EL) performance still lags behind that of lead-based PeLEDs, primarily due to the poor crystal quality of tin-based perovskite films. In this work, inspired by advances in lead-based PeLEDs, we integrated Lewis base derivatives with phospho-oxygen functional groups of varying substituents into tin-based perovskites. This approach allowed us to analyze the interaction between these groups and the perovskite matrix. The introduction of additives at optimal concentrations reduced the grain size of CsSnBr 3 , improved its grain morphology, and enhanced the film quality, resulting in better photoelectric performance. Consequently, the developed red tin-based PeLEDs demonstrated a five-fold increase in maximum brightness (50 cd/m 2 ) and a ten-fold increase in operational lifetime (79.2 s), alongside stable color emission under varying voltages. This work offers a viable pathway for advancing the performance and stability of tin-based PeLEDs, paving the way for future innovations in this field.
研究领域:
材料科学
·
光学工程
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DOI
高影响因子
ACS Applied Optical Materials
·
2026
·
IF 3.4
Bo Wang,Jingrui Zhang,Liangyi Gu,Jiahong Li,Jian Wang,Limin Zhang,Yuxiao Wu,Xiaoshuang Li
Lead-free halide perovskites have drawn considerable interest, owing to their low-toxicity and favorable photophysical characteristics. However, achieving efficient near-infrared (NIR) emission often suffers from a trade-off between the red shift and quantum yield. Herein, we report a synergistic host-dopant strategy in zero-dimensional Cs2-xRbxInBr5·H2O perovskites. Controlled Rb+ alloying induces lattice contraction, which unexpectedly weakens electron–phonon coupling and suppresses nonradiative decay, leading to a high photoluminescence quantum yield (PLQY) of 53.2%. Subsequently Mn2+ doping further passivates defect states, boosting the PLQY to 67.5%. Density functional theory calculations and temperature-dependent spectroscopy elucidate the role of the lattice strain in regulating self-trapped exciton emission. A prototype NIR phosphor-converted light-emitting diode (pc-LED) fabricated from the optimized material demonstrates a promising performance in night-vision imaging and plant growth applications. This work provides a viable design strategy for efficient and stable NIR phosphors via a coupled lattice and defect engineering.
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DOI
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2026
·
IF 11.8
Zhao Wang,Tong Wang,Yawen Gong,Yinan Zhang
Light emitting diodes (LEDs) are widely used in road lighting due to their high luminous efficiency and long lifetime. However, during operation, LEDs are prone to luminous efficiency decay and lifetime reduction because of the Joule heating effect. This study develops a passive cooling device by integrating an h-BN@acrylic/TiO 2 radiative cooling coating onto a conventional heat sink, enabling radiative and non-radiative synergistic heat dissipation. The device exhibits high solar reflectance (97.3%), strong mid-infrared emissivity (96.2%), and excellent non-radiative heat transfer coefficient (18.2 W m −2 K −1 ). Results demonstrate that under outdoor solar irradiance of ∼926 W m −2 , the device reduces the temperature of a 30 W LED by 8.1 ± 0.3 °C compared to a commercial LED light. After more than 3,600 h of aging tests, the LED maintained 97.9% of its initial luminous flux, exhibiting a 2.17% improvement in luminous efficiency compared to a traditional light. If applied across China’s LED road lighting network, this device potentially saves approximately 773 million kWh of electricity annually, reducing CO 2 emissions by 420,000 tons. Combining experimental and computational approaches, this work demonstrates the synergistic benefits of multimodal thermal management for high-power optoelectronic devices and offers both theoretical insights and practical strategies for achieving above-ambient cooling.
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DOI
高影响因子
Laser & Photonics Reviews
·
2025
·
IF 10
Yimin Zhou,Chenyang Li,Fei Tang,Xinzhe Fang,Xuan Li,Xiangzhou Lao,Guowei Du,Shijie Xu
Large-size ultrathin phosphor-glass composites (PGCs), characterized by superior thermal dissipation properties, have demonstrated considerable potential for high-power illumination and adjustable color emission. Here, a facile and versatile strategy is presented to fabricate highly efficient ultrathin PGCs with dimensions reaching 1044 × 45 × 0.1 mm 3 , using an integrated tape-casting and low-temperature co-firing approach. Phosphor particles are embedded into the glass matrix via a pressureless sintering process. The impact of the glass matrix on the luminescent properties of both yellow and red phosphors is systematically evaluated. These findings indicate that ultrathin PGCs embedded with YAG:Ce particles exhibit an exceptionally high photoluminescence quantum yield (PLQY) of 98.6%, while those incorporating CaAlSiN 3 :Eu 2 ⁺ phosphors achieve a PLQY of ≈93.4%. Additionally, comprehensive analyses are conducted on spectral blue shifts, luminescence lifetime variations, and temperature-dependent photoluminescence characteristics over a broad temperature range. Light-emitting diode (LED) devices fabricated using these ultrathin PGCs show superior luminous performance, notably exhibiting a high electrical power threshold prior to luminescence saturation. Furthermore, it is successfully demonstrated tunable color emission in these ultrathin PGCs by varying the weight ratios of different phosphors. These remarkable ultrathin PGCs represent a significant advancement, providing promising and highly efficient solutions for next-generation high-power commercial LED illumination applications.
研究领域:
材料科学
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光电子学
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固态照明
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复合材料
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光子学
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产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2016
·
IF 2.693
Yiru Wang,Xiaohua Liu,Pengfei Niu,Lindan Jing,Weiren Zhao
Novel Eu 3+ activated Gd 2 Mo 4 O 15 phosphors were synthesized at the comparatively low temperature of 700 °C via solid-state reaction. X-ray powder diffraction results demonstrate that the phosphors crystallize in the triclinic crystal structure, the space group P I ¯ . The photoluminescence spectra and ultraviolet-visible (UV–vis) reflectance and transmittance spectra indicate that Eu 3+ doped Gd 2 Mo 4 O 15 phosphors show a broad and strong absorption band covering ultraviolet (UV) and near ultraviolet (NUV) regions and the crystals emit red light with peak maximum at about 618 nm under excitation of UV, NUV or blue light. The optimal doping concentration of Eu 3+ ions in Gd 2 Mo 4 O 15 phosphors is around 50 mol% and the main concentration quenching mechanism is determined to be the exchange interaction.
研究领域:
材料科学
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光学材料
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荧光粉化学
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LED技术
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固态照明
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DOI
高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Chengyang Liang,Lin Zhang,Delin Kong,Mengqi Zhang,Zhitao Xue,Jianjun Tian
The elimination of redundant surface organic ligands on perovskite quantum dots (PQDs) is a critical procedure for the construction of high-efficiency light-emitting diodes (LEDs). Nevertheless, such ligand removal readily induces undesirable phase transition owing to the intrinsically unstable surface configuration of PQDs, which severely hinders the large-scale manufacturing of high-performance LEDs. Herein, we develop tetrabutylammonium hexafluorophosphate (TBAPF 6 ) surface reconstruction of CsPbI 3 PQDs during di-isooctylphosphinic acid (DSPA) assisted synthesis and purification. The short chain DSPA has strong coordination with PQDs, while TBA + ions are compensated for Cs + surface vacancies, and PF 6 − ions combine onto Pb 2+ sites to stabilize the structure through filling I − vacancies. This strategy substantially suppressed phase transformation during synthesis and purification, thereby enhancing the moisture and oxygen stability of the PQDs to extend the processing window of device fabrication. LEDs fabricated using freshly stored PQD within 7 days showed negligible efficiency degradation, yielding a peak external quantum efficiency (EQE) over 25%. Notably, even after long-term storage for 30 days, the assembled LEDs still achieved a high EQE of more than 22%. Accordingly, this strategy provides a viable pathway for the scalable preparation of wide-processing-window LEDs.
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DOI
高影响因子
OPTICS LETTERS
·
2018
·Vol. 44
·期 1
·90-93
·
IF 3.589
Jiasheng Li,Yong Tang,Zongtao Li,Xinrui Ding,Longshi Rao,Binhai Yu
Although quantum dots (QDs) have a high quantum yield close to one in a solution, they exhibit low conversion efficiency in a solidification polymer matrix, which hampers the development of QD-based light-emitting diodes (LEDs) with high stability and optical performance. In this study, we proposed a methyl-terminated-polydimethylsiloxane-(PDMS)-based liquid-type packaging structure (LPS) to improve stability and optical performance of QD-based LEDs. Compared with the traditional ethylene-terminated-PDMS-based solid-type packaging structure, the LPS with an optimized kinematic viscosity of 10000 m2/s can provide higher stability and optical performances for QD-based LEDs, including total radiant power and luminous flux. Consequently, the proposed effective and simple strategy has great potential for illumination and display applications.
研究领域:
材料科学
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光电子学
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DOI
PubMed
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Qiliang Chen,Han Xu,Shuai Yang,Guoying Zhao,Langping Dong,Jingshan Hou,Yongzheng Fang
A series of color-tunable Na 2 Ca(PO 4 )F:Eu 2+ , Mn 2+ phosphors were prepared by solid state reaction. The structure, as well as the photoluminescent properties of the as-prepared phosphor were investigated. The energy transfer process between Eu 2+ -Mn 2+ was also discussed. The phosphor demonstrates luminescence in the range of 420 nm–750 nm under UV excitation. Specifically, the emission spectra comprise green light (420–550 nm) attributed to the 4f-5d transition of Eu 2+ ions, and orange red light (550–750 nm) resulting from the 6 A 1 → 4 A 1 ( 4 G), 4 E( 4 G) transitions of Mn 2+ ions. An effective dipole-dipole energy transfer has been confirmed to occur between the co-doped Eu 2+ and Mn 2+ ions. The luminescent color of the as-prepared phosphors can change from blue to yellow, and finally to orange red by adjusting the doping amount of the co-doped ions. The optimal sample's EQE reached 20.59% due to the high absorption efficiency. Finally, a 400 nm violet light chip excited white LED with a high color rendering index (CRI) of Ra = 98 was fabricated by using the as-prepared Na 2 Ca(PO 4 )F:0.02Eu 2+ ,0.04Mn 2+ phosphor in combination with the commercial blue Sr 5 (PO 4 ) 3 Cl:Eu 2+ phosphor and red CaAlSiN 3 :Eu 2+ phosphor. The results indicated that the developed phosphor holds notable potential for application in in the field of sunlike healthy lighting.
研究领域:
材料科学
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光电子学
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固态照明
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无机化学
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产品关联
DOI
高影响因子
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
·
2026
·Vol. 38
·期 5
·419-425
·
IF 0.7
Fan Su,Chenyu Wang,Xuan Shen
Developing high performance UV-LED excited photoinitiators is one of research focuses in the field of photopolymerization. Thioxanthone derivatives, which reveal outstanding absorptions in the UV-Vis spectra, have potential excited by UV light source. In this article, two novel thioxanthone-based photoinitiators, 9-oxo-9H-thioxanthen-2-yl 4-(dimethylamino)benzoate (TXOH-DB) and 1-chloro-9-oxo-9H-thioxanthen-4-yl 4-(dimethylamino)benzoate (TXCl-DB), were designed and synthesized, and their structure has been confirmed by FT-IR and 1H NMR. The UV-vis spectra showed that these two photoinitiators appeared redshift compare with TX, and the UV absorption ability of TXCl-DB was stronger than TX. Steady state photolysis experiments and photopolymerization experiments indicated that TXOH-DB and TXCl-DB were one-component photoinitiators and could successfully initiate 2-hydroxyethyl acrylate (HEA), 1,6-hexanediol diacrylate (HDDA) and Trimethylolpropane triacrylate (TMPTA) under UV-LED @395 nm (10 W) without the presence of co-initiatar. In addition, TXOH-DB and TXCl-DB have better migration stability and have the potential for use in UV curing systems, especially in food packaging and biomedical applications.
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DOI
高影响因子
Journal of Materials Chemistry C
·
2020
·Vol. 8
·期 12
·3996-4002
·
IF 7.059
Weibin Chen,Xuejie Zhang,Jianxian Zhou,Haoran Zhang,Jianle Zhuang,Zhiguo Xia,Yingliang Liu,Maxim S. Molokeev,Gening Xie,Bingfu Lei
As one of the key elements of indoor agriculture, horticultural light sources are developing rapidly towards requiring high energy density, high output power and high stability, which poses a challenge for traditional phosphor conversion devices. To address this, an all-inorganic blue-red dual-emitting light convertor consisting of Ba1.3Sr1.7MgSi2O8:Eu2+,Mn2+ (BSMS) phosphor-in-glass (PiG) plates was prepared to improve the duration lifetime of converted high-power light-emitting diodes (LEDs) and meet the light quality requirements of photosynthesis for indoor agriculture. The obtained samples show an external quantum efficiency of 45.3%, outstanding thermal stability and a specific emission spectrum that highly matches the absorption of chlorophyll and β-carotene. Moreover, a proof-of-concept BSMS-PiG horticultural lamp for application in an indoor plant factory was successfully fabricated based on a ∼370 nm emitting LED chip. The blue-red ratio of its spectrum could be regulated by controlling the thickness of BSMS-PiG and the concentrations of Mn2+ ions within BSMS-PiG. The BSMS-PiG horticultural LEDs were applied to the indoor cultivation of Romaine lettuce. The results indicated that the biomass of Romaine lettuce was 58.21% greater than that of control lettuce samples cultivated under commercial plant lamps. In particular, the content values of total chlorophyll, β-carotene and soluble protein were improved. The BSMS-PiG horticultural LED is a potential candidate to act as a high-power horticultural light source.
研究领域:
材料科学
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园艺照明
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光学材料
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固态照明
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室内农业
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光子学
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DOI
高影响因子
Small
·
2026
·Vol. 22
·期 35
·e73661
·
IF 11.8
Yue Lin,Yifei Liu,Xuemin Kong,Jiayuan Li,Yu Chen,Siting Cai,Yuchen Zhou,Tianqi Zhang,Ningjun Zhou,Wenan Guo,Zhenning Sun,Guolong Chen,Tingzhu Wu,Zhong Chen,Shuli Wang
Photolithographic patterning of perovskite nanocrystals (PeNCs) is pivotal for realizing color-conversion schemes in full-color Micro-LED displays; however, this process is currently hindered by severe material degradation and a pervasive reliance on toxic organic solvents. Herein, we propose a robust PeNC photoresist strategy designed for compatibility with eco-friendly green solvents, specifically enabling the use of benign ethanol as a developer for high-resolution patterning. By synthesizing PeNCs directly within isobornyl acrylate (IBOA) monomers and engineering an in situ SiO 2 encapsulation layer via hydrolysis, we achieve superior material stability. Remarkably, the resulting PeNC@SiO 2 /IBOA composites retain bright fluorescence after 3480 h of ethanol immersion, whereas uncoated controls quench completely within 96 h. Leveraging this stability, we successfully patterned color conversion pixels with dimensions of 20 µm × 10 µm via photolithography with green solvent ethanol as the developer, which retain 80.3% of their initial photoluminescence quantum yield (PLQY) post-lithography. The successful fabrication of highly uniform red, green, and blue (RGB) pixel arrays demonstrates the significant potential of this green, high-performance lithography strategy of PeNCs for next-generation Micro-LED displays.
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DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 14
·2302870
·
IF 8
Shujie Gai,Peixin Gao,Ke Chen,Chengzhu Tang,Yuanyuan Zhao,Jiaqi Wei,Ye Zhang,Maxim S. Molokeev,Mao Xia,Zhi Zhou
Since Bi 3+ -activated phosphor are widely reported in phosphors-converted light-emitting diodes (pc-LEDs), developing new-high efficiency phosphors is imperative. Herein, superior internal quantum efficiency (IQE = 93.7%) and external quantum efficiency (EQE = 70.5%) are achieved with blue-emitting gallate phosphor CaGdGaO 4 :Bi 3+ . Particularly, the photoluminescence excitation (PLE) spectrum ranges from 200 to 400 nm with two peaks at 337 and 368 nm, which match well with the 365 nm near ultraviolet (n-UV) chip. The blue emission is attributed to two luminescence centers caused by Bi 3+ occupying GdO 6 and CaO 6 sites. Furthermore, the thermal stability (@ 150 °C) enhanced from 73.2% to 80.1% when Ca 2+ doping. A white LED (WLED) with high color rendering index (Ra) of 93.8 is prepared by as-synthesized phosphors, indicating the potential application in WLED. The blue and red dual-emitting phosphors are achieved by co-doping Bi 3+ and Eu 3+ . Finally, the rice planting experiment presents that the blue-emitting can efficiently enhance the photosynthesis and seeding index of rice, which indicated these phosphors have significance in plant fill light.
研究领域:
材料科学
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光电子学
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固态照明
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荧光转换LED
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植物生理学
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园艺照明
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DOI
高影响因子
危险品化学品经营许可证（带存储）