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303 results on '"Gao, Huiping"'

12. Liquid Nitrogen Temperature Multicolor Persistent Luminescence in a Single Host Material.

Author

Li, Jiacai, Zhang, Xiaomin, Yu, Ruoxi, Chen, Chao, Zhang, Chennan, Li, Mingxing, Pan, Gencai, Zhang, Huafang, Gao, Huiping, You, Wenwu, and Mao, Yanli

Subjects
PHOSPHORS, LOW temperatures, LUMINESCENCE, LIQUID nitrogen, OCTAHEDRA
Abstract

Persistent luminescence (PersL) phosphors have garnered significant attention for their extensive applications in various fields. It is regrettable that these PersL phosphors typically possess deep traps. At low temperatures (LT), energy stored in the trap cannot be released to the luminescent centers through thermal de‐trapping, thereby causing these PersL phosphors to lose their PersL characteristics in LT. Currently, there is little research on LT PersL phosphors, and multicolor LT PersL in a single host material has not been reported. In this work, multicolor LT PersL is achieved in a single host material by modifying the emission center. Remarkably, an ultra‐shallow trap with a depth of 0.23 eV is discovered in the Cs2NaLuCl6:5%Ln3+ phosphors, which is essential for achieving PersL at 77 K. First‐principles calculations indicate that the ultra‐shallow trap in Cs2NaLuCl6:5%Ln3+ is caused by the distortion of [NaCl6] octahedron in the phosphors. These findings provide new perspectives into X‐ray‐induced trap generation and offer valuable insights for designing multicolor PersL phosphors for LT applications. [ABSTRACT FROM AUTHOR]

Published
2024
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19. Ultraviolet–Visible-Near-Infrared Broadband Photodetector Enabled by Cs2AgBiBr6: Sn/Conjugated Polymer Heterojunction

Author

Lv, Zhipeng, Gao, Huiping, Hu, Yayong, Fan, Yunpeng, Pan, Gencai, Zhang, Huafang, You, Wenwu, Zhang, Zhenlong, and Mao, Yanli

Abstract

Broadband photodetectors covering ultraviolet (UV) to near-infrared (NIR) wavelengths play an essential role in communications, imaging, and biosensing. Developing a single photodetector with a broadband optical response operating at room temperature can significantly reduce the complexity and cost of receiver systems for multispectral applications. In this work, utilizing the porous structure characteristics of Cs2AgBiBr6:Sn thin films, a self-powered detector with broad spectral response (UV–vis-NIR) was achieved by constructing an effective Cs2AgBiBr6:Sn/PDPP3T heterojunction. This photodetector possesses a broad response spectrum from 350 to 950 nm with an average detection rate exceeding 1011Jones and maintains excellent photoelectric performance over two months. Sn2+doping effectively reduces the bandgap of Cs2AgBiBr6, enhancing its near-infrared absorption and optimizing energy level alignment with conjugated polymer (diketopyrrolopyrrole-terthiophene, PDPP3T). More importantly, the porous structure derived from Sn doping significantly improves carrier extraction and transport under a near-infrared light response at the heterojunction interface. Utilizing its broad spectral response characteristics in the UV–vis-NIR range, a novel information transfer and encryption system employing full optical modulation has been realized within a single perovskite photodetector. This work provides a new approach to fabricating lead-free double perovskite broadband photodetectors with potential applications in photonic devices.

Published
2024
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36. Thulium‐Doped Sodium‐Ytterbium Double Perovskite Single Crystals: A Novel and Efficient Upconverter for Achieving Highly Sensitive Narrowband Near‐Infrared Perovskite Photodetectors.

Author

Xue, Wenfeng, Pan, Gencai, Li, Chao, Zhu, Yaxian, Wang, Yaqiong, Kong, Bingyin, Gao, Huiping, Zhang, Huafang, You, Wenwu, and Mao, Yanli

Subjects
SINGLE crystals, PEROVSKITE, DOPING agents (Chemistry), PHOTODETECTORS, POWER density, PHOTON upconversion, LUMINESCENCE
Abstract

Developing fluorescent materials that can achieve efficient upconversion (UC) emission under low power density excitation has always been a great challenge, especially for Tm3+ ions. Here, Tm3+‐doped Cs2NaYbCl6 double perovskite single‐crystals (DPSCs) are prepared successfully. The DPSCs exhibit efficient UC emission under 980‐nm laser excitation, and the optimum UC efficiency reaches 9.48%. It is a recorded value. More importantly, its efficient UC emission can be achieved under low‐power density of 0.117 W cm−2 excitation. Moreover, the luminescence color of the DPSCs can be regulated from blue to red by increasing the doping concentration of Tm3+ ions. This is because the severe cross‐relaxation occurs between Tm3+ ions at high doping concentrations. The Cs2NaYb0.98Tm0.02Cl6 DPSCs with efficient UC emission are coupled to the CsPbI3 perovskite photodetector, achieving good visible and near‐infrared (NIR) detection without an external bias. It is worth emphasizing that the detectivity for 980 nm light can reach 1.26 × 1011 Jones, which is the highest value for self‐powered NIR photodetectors. Finally, given the dual functional characteristics of the device's response to broadband visible and narrowband NIR light, the dual encryption function is implemented during information transmission. This work will open new chances for applications in advanced integrated photonics devices. [ABSTRACT FROM AUTHOR]

Published
2024
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39. A Combination Method of Edge Detection and SVM Filtering for License Plate Extraction

Author

Gao, Huiping, Liu, Ningzhong, Zhao, Zhengkang, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, and Zhang, Yu-Jin, editor

Published
2015
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44. Table S4 from Chimeric Antigen Receptor-Glypican-3 T-Cell Therapy for Advanced Hepatocellular Carcinoma: Results of Phase I Trials

Author

Shi, Donghua, primary, Shi, Yaoping, primary, Kaseb, Ahmed O., primary, Qi, Xingxing, primary, Zhang, Yuan, primary, Chi, Jiachang, primary, Lu, Qing, primary, Gao, Huiping, primary, Jiang, Hua, primary, Wang, Huamao, primary, Yuan, Daijing, primary, Ma, Hong, primary, Wang, Hongyang, primary, Li, Zonghai, primary, and Zhai, Bo, primary

Published
2023
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46. Supplementary Methods from Chimeric Antigen Receptor-Glypican-3 T-Cell Therapy for Advanced Hepatocellular Carcinoma: Results of Phase I Trials

Author

Shi, Donghua, primary, Shi, Yaoping, primary, Kaseb, Ahmed O., primary, Qi, Xingxing, primary, Zhang, Yuan, primary, Chi, Jiachang, primary, Lu, Qing, primary, Gao, Huiping, primary, Jiang, Hua, primary, Wang, Huamao, primary, Yuan, Daijing, primary, Ma, Hong, primary, Wang, Hongyang, primary, Li, Zonghai, primary, and Zhai, Bo, primary

Published
2023
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47. Protocol of Study 1 from Chimeric Antigen Receptor-Glypican-3 T-Cell Therapy for Advanced Hepatocellular Carcinoma: Results of Phase I Trials

Author

Shi, Donghua, primary, Shi, Yaoping, primary, Kaseb, Ahmed O., primary, Qi, Xingxing, primary, Zhang, Yuan, primary, Chi, Jiachang, primary, Lu, Qing, primary, Gao, Huiping, primary, Jiang, Hua, primary, Wang, Huamao, primary, Yuan, Daijing, primary, Ma, Hong, primary, Wang, Hongyang, primary, Li, Zonghai, primary, and Zhai, Bo, primary

Published
2023
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50. Protocol of Study 2 from Chimeric Antigen Receptor-Glypican-3 T-Cell Therapy for Advanced Hepatocellular Carcinoma: Results of Phase I Trials

Author

Shi, Donghua, primary, Shi, Yaoping, primary, Kaseb, Ahmed O., primary, Qi, Xingxing, primary, Zhang, Yuan, primary, Chi, Jiachang, primary, Lu, Qing, primary, Gao, Huiping, primary, Jiang, Hua, primary, Wang, Huamao, primary, Yuan, Daijing, primary, Ma, Hong, primary, Wang, Hongyang, primary, Li, Zonghai, primary, and Zhai, Bo, primary

Published
2023
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