iScience
·
2023
·
IF 5.8
Haocheng Tang,Yichi Zhong,Jingzhou Li,Luyang Hou,Xizhe Liang,Jiahao Zhang,Hongyu Yang,Hongxing Dong,Long Zhang
Benefiting from the high modulation bandwidth (BW), low energy consumption and excellent optical performance, lead halide perovskite has attracted wide attention in visible light communication (VLC). However, the ion migration which results in mobile point defects in perovskite structures is recognized as a crucial key factor inducing the performance degradation. Here, the influence of ion migration in perovskite devices on the performance of VLC was systematically studied. The ion migration process is realized by mixing CsPbBr 3 and CsPbI 3 quantum dots, during which, the performance of the VLC system is reduced, but it can return to its initial state after stabilization. The on-off keying (OOK) modulation scheme of the perovskite light-emitting diode (LED) device was carried out, achieving a data rate of 90 Mbps.
研究领域:
材料科学
·
通信工程
·
光学工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2023
·
IF 9
Ximing Sun,Zhanyu Wang,Xuejing Du,Dawei Zhao,Feng Cui,Lujia Cong,Yandong Ren
Optical communication has become a research hotspot in modern non-contact communication systems, and high-performance photodetectors, as a key component, are crucial for achieving high-fidelity signal transmission. Photoconductive devices (PCDs) are expected to find applications in the field of optical communication due to their advantages in high gain. However, it is difficult to achieve an effective balance between high responsiveness and fast response times in PCDs, leading to significant challenges in their commercial applications in the field of optical communication. In this paper, by employing both the mask method and channel width tuning method, a high-performance PCD is developed based on the Ag-MAPbI 3 -Ag structure, demonstrating a high responsivity of 45.5 A W −1 , a high detectivity of 7 × 10 12 Jones, and a fast response time of 0.35 ms. Finally, this device is integrated into an optical communication system using embedded technology, effectively achieves byte transmission, and demonstrates the practical application of single-crystal MAPbI 3 PCD as a signal receiver in the system. This research provides a noteworthy approach to facilitating the seamless integration and commercialization of optical communication systems utilizing perovskite single-crystal devices, while also paving the way for optical interconnects based on perovskite.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
Advanced Optical Materials
·
2023
·
IF 9
Haoyue Zhang,Yuru Tang,Chen Chen,Meiqin Xiao,Jonghee Yang,Wei Zhang,Chaochao Qin,Ting Xiang,Long Xu,Ping Chen
Metal halide perovskites are promising light source materials for visible light communication (VLC) due to their excellent photoelectric properties and small resistance-capacitance time constant. However, previous reports mainly used perovskites as the passive light sources, which not only makes it susceptible to posterior excitation light sources, but also complex in the integration process. Herein, the quasi-2D PEA 2 Cs n-1 Pb n Br 3n+1 perovskite light–emitting diodes (PeLEDs) as an active light source in VLC link is demonstrated. It is found that the charging/discharging process of PeLEDs is an important factor governing the -3 dB bandwidth (f -3 dB ) of the VLC. To improve this, 3-sulfopropyl methacrylate potassium salt (SMPS) molecules are introduced into perovskite to simultaneously passivate deep and shallow energy level defects at grain boundaries. Additionally, the multiple quantum wells structures of PEA 2 Cs n-1 Pb n Br 3n+1 are modified to be flat. At the optimal SMPS concentration, the maximum external quantum efficiency of PeLEDs reaches 21.5%. Meanwhile, the VLC achieves 3.2 MHz f -3 dB with data transmission of 18.6 Mbps, which is the highest f -3 dB in PeLEDs with the same active area. Hence, it provides a versatile method to improve the performance of VLC links based on active light sources and advances toward the goal of high-speed, energy-efficient and secure free communication.
研究领域:
材料科学
·
光电子学
·
通信工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2020
·Vol. 5
·期 8
·2000260
·
IF 5.969
Zhiyong Liu,Xingyue Liu,Bo Sun,Xianhua Tan,Haibo Ye,Jianxin Zhou,Zirong Tang,Tielin Shi,Guanglan Liao
Photodetectors are essential parts of wireless optical communication system for obtaining high fidelity signal transmission, which mainly relies on expensive and energy-consuming Si, GaN, and InGaAs based photodiodes. The emerging organic–inorganic metal halide perovskite materials, with the merits of low-cost, strong optical absorption, superior charge transport, and so on, are widely investigated in photodetection applications. Herein, a Cu ion induced p-type doping strategy for perovskite film is proposed to facilitate hole transport, passivate trap states, avoid charge accumulation, and suppress recombination of photogenerated carriers, contributing to an enhanced photoelectric performance for self-powered hole-conductor-free devices. The optimal device shows a highest responsivity of 0.37 A W −1 , detectivity of 1.06 × 10 12 Jones, linear dynamic range of over 101 dB, and an ultimate photoresponse rate approaching 5 µs. Moreover, an optical communication system integrated with the perovskite photodetector as light signal receiver for transmitting digital signals is demonstrated, in which characters can be transmitted accurately, and audio signal is recovered with high fidelity. The results suggest that with proper chemical modification, perovskite materials are promising alternative to inorganic semiconductors for efficient photodetection in advanced integrated optical communication system.
研究领域:
材料科学
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光学工程
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2022
·Vol. 10
·期 17
·2200836
·
IF 10.05
Hexin Chen,Tuan Lin,Fan Huang,Shuxing Li,Xueyuan Tang,Rong-Jun Xie
Green light is generally used as the transmitter of underwater wireless optical communication (UWOC) system, but the currently available light-emitting diode (LED)-based green light has a poor luminous flux density (i.e., low brightness) and a low wall-plug efficiency (WPE), known as the “green gap”. In this work, it is proposed to produce the laser-driven green light by using blue laser diodes to pump the narrow-band green-emitting β-Sialon phosphor-in-glass (PiG) film. The dominant wavelength of the laser-driven green light can be tuned in the range of ≈520–540 nm, required for UWOC, by controlling the phosphor content at ≈60–80% and the film thickness at ≈150–185 µm. By introducing highly reflective TiO 2 into the PiG film, the laser-driven green light exhibits a maximum luminous flux density of 1260 lm mm −2 under blue laser excitation with a power density of 15.49 W mm −2 . For UWOC application, the green light is demonstrated to have a modulation bandwidth of 1.76 MHz, a high WPE of 8.7%, and a long transmission distance of ≈61.6 m. This work suggests that the laser-driven high-brightness green light will be a promising light source for UWOC.
研究领域:
光学
·
通信工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2018
·Vol. 29
·期 45
·455708
·
IF 3.404
Dingke Xue,Cheng Ruan,Yu Zhang,Haobin Chen,Xiongbin Chen,Changfeng Wu,Chuantao Zheng,Hongda Chen,William W Yu
The bandwidth of white light emitting diodes (WLEDs) is an important factor that affects most of the system performances in visible light communication (VLC). It is mainly limited by the down-conversion phosphors. We propose in this paper to employ nanomaterial phosphors with short fluorescence lifetime and high quantum yield in VLC. The white-emitting device of bandwidth-based lifetime was fabricated by using several kinds of nanophosphors with different fluorescence lifetimes. Moreover, we proposed two theoretical models to analyze the factors that affect bandwidth. Compared with the commercial YAG-based WLEDs, the bandwidth of nanophosphor-based WLEDs can be improved over three times and close to the blue excitation sources. Our study indicates that nanophosphors can become promising fluorescent materials in VLC, and provides a new direction for developing wide-bandwidth VLC systems.
研究领域:
光学
·
通信工程
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanomaterials
·
2023
·Vol. 13
·期 2
·355
·
IF 5.3
Longshi Rao,Bin Sun,Yang Liu,Guisheng Zhong,Mingfu Wen,Jiayang Zhang,Ting Fu,Shuangxi Wang,Fengtao Wang,Xiaodong Niu
Inorganic lead halide perovskite is one of the most excellent fluorescent materials, and it plays an essential role in high-definition display and visible light communication (VLC). Its photochromic properties and stability determine the final performance of light-emitting devices. However, efficiently synthesizing perovskite with high quality and stability remains a significant challenge. Here, we develop a facile and environmentally friendly method for preparing high-stability and strong-emission CsPbBr3/Cs4PbBr6composites using ultrasonication and liquid paraffin. Tuning the contents of liquid paraffin, bright-emission CsPbBr3/Cs4PbBr6composite powders with a maximum PLQY of 74% were achieved. Thanks to the protection of the Cs4PbBr6matrix and liquid paraffin, the photostability, thermostability, and polar solvent stability of CsPbBr3/Cs4PbBr6-LP are significantly improved compared to CsPbBr3quantum dots and CsPbBr3/Cs4PbBr6composites that were prepared without liquid paraffin. Moreover, the fabricated CsPbBr3/Cs4PbBr6-LP-based WLEDs show excellent luminescent performance with a power efficiency of 129.5 lm/W and a wide color gamut, with 121% of the NTSC and 94% of the Rec. 2020, demonstrating a promising candidate for displays. In addition, the CsPbBr3/Cs4PbBr6-LP-based WLEDs were also demonstrated in a VLC system. The results suggested the great potential of these high-performance WLEDs as an excitation light source to achieve VLC.Keywords:ultrasonication;liquid paraffin;CsPbBr3/Cs4PbBr6;white-light-emitting diodes;visible light communication
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2019
·Vol. 11
·期 8
·3489-3494
·
IF 6.97
Zhen Tian,Pengfei Tian,Xiaojie Zhou,Gufan Zhou,Shiliang Mei,Wanlu Zhang,Xutao Zhang,Di Li,Ding Zhou,Ruiqian Guo,Songnan Qu,Andrey L. Rogach
Herein, we report UV-pumped white light emissive carbon dot (CD)-based phosphors to prevent blue light hazard in phosphor-converted WLEDs. Then, UV-pumped WLEDs with a color rendering index exceeding 85 and VLC with a modulation bandwidth of 75 MHz and a data transmission rate of 224 Mbps have been realized.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
DOI
高影响因子
Nano-Micro Letters
·
2025
·Vol. 17
·期 1
·1-15
·
IF 36.3
Dong Kailian,Jiang Tao,Chen Guoyi,Cui Hongsen,Wang Shuxin,Zhou Shun,Wang Chen,Yang Yi,Yao Fang,Tao Chen,Ke Weijun,Fang Guojia
The light management strategy is introduced into two-dimensional Dion-Jacobson (2D DJ) perovskite and subsequently elucidated both experimentally and theoretically.
The synthesis of surface-patterned BDAPbBr 4 microplates with high crystalline quality demonstrates the first reported instance of growing such 2D DJ-type perovskite microplates.
The optimized device exhibits excellent photodetection performance under UV region. Moreover, this work represents the successful demonstration of BDAPbBr 4 perovskite for UV weak-light communication, imaging, and polarized light detection.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Shiliang Mei,Xiaoyan Liu,Wanlu Zhang,Ran Liu,Lirong Zheng,Ruiqian Guo,Pengfei Tian
This work proposes a high-bandwidth white-light system consisting of a blue gallium nitride (GaN) micro-LED (μLED) exciting yellow-emitting CsPbBr1.8I1.2 perovskite quantum dots (YQDs) for high-speed real-time visible light communication (VLC). The packaged 80 μm × 80 μm blue-emitting μLED has a modulation bandwidth of ∼160 MHz and a peak emission wavelength of ∼445 nm. The achievable bandwidth of the white-light system is up to 85 MHz in the absence of filters and equalization technology. Meanwhile, the bandwidth of the YQDs as a color converter is as high as 73 MHz with the blue GaN μLED as the pump source. A maximum data rate of 300 Mbps can be achieved by taking advantage of the high bandwidth of the white-light system using the non-return-to-zero on–off keying (NRZ-OOK) modulation scheme. The resultant bit-error rate is 2.0 × 10–3, well beneath the forward error correction criterion of 3.8 × 10–3 required for error-free data transmission. In addition, the YQDs which we proposed as a color converter possess high stability for VLC. After half a year, the achievable bandwidths of the white-light system and the YQDs are still up to 83 and 70 MHz, respectively. This study provides the direction of developing high-bandwidth white-light system for both high-efficiency solid-state lighting and high-speed VLC.
研究领域:
光学
·
通信工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 34
·11697-11704
·
IF 6.4
Yun-Peng Zhao,Zhi-Hong Zhang,Shan-Shan Yan,Bao-Shi Qiao,Zhen-Dong Lian,Zhi-Peng Wei,Francis Chi-Chung Ling,Hong-Yu Chen,Shi-Chen Su,Kar Wei Ng,Shuang-Peng Wang
Recently, halide perovskite materials have shown great potential in photodetection due to their large light absorption coefficient and long carrier diffusion length. In contrast to the reported sandwich-structured devices and single-junction perovskite photodetectors, we demonstrate here a MAPbBr3/MAPbCl3 bulk heterostructure by splicing a MAPbBr3 single crystal and a MAPbCl3 single crystal. Interestingly, the photo-carriers generated from MAPbBr3 and MAPbCl3 can only be extracted when the device is forward and reverse biased, respectively. The capability to read out the photocurrents from the single crystals with different band gaps separately enables dual-band optical detection. In particular, the heterostructure photodetector exhibits a fast on–off switching time on the order of microseconds and peak responsivities of 17 mA W−1 at 450 nm and 7 mA W−1 at 355 nm, respectively. Dual-band photodetection is proved to be useful for dual-wavelength light communications. Our work provides a facile route to construct bulk heterostructures and the wavelength/bias-sensitive rectifier could provide guidance for optical communication modules in the future.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Zhaoming Wang,Zixian Wei,Yuting Cai,Lei Wang,Mutong Li,Ping Liu,Rongjun Xie,Lai Wang,Guodan Wei,H. Y. Fu
Cesium lead halide perovskite nanocrystals have recently become emerging materials for color conversion in visible light communication (VLC) and solid-state lighting (SSL), due to their fast response and desirable optical properties. Herein, perovskite nanocrystal-polymethyl methacrylate (PNC-PMMA) films with red and yellow emission are prepared. The PNC-PMMA films, with optical properties such as a short lifetime and air stability, are used to make broadband color converters based on a high-bandwidth 75 μm blue micro-LED (μLED) for VLC. The yellow-emitting CsPb(Br/I)3 PNC-PMMA has a high bandwidth of 347 MHz, while the red-emitting CsPbI3 PNC-PMMA exhibits a higher modulation bandwidth of 822 MHz, which is ∼65 times larger than that of conventional phosphors. After fixing the two PNC-PMMA films in front of the μLED, a qualified warm white light is generated with a correlated color temperature of 5670 K, a color rendering index of 75.7, and a de L’Eclairage (CIE) coordinate at (0.33, 0.35). Although the color conversion of the blue light sacrifices some received power and slightly reduces the overall bandwidth from 1.130 to 1.005 GHz, a maximum real-time data rate of 1.7 Gbps is still achievable using the non-return-to-zero on–off keying modulation scheme, which is ∼6 times higher than that of the previous record. This study provides a practical approach to develop a considerably high-bandwidth white-light system for both high-speed VLC and high-quality SSL.
研究领域:
材料科学
·
光电
·
通信工程
·
光子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）