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Your search keyword '"Ban, Xinxin"' showing total 42 results
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42 results on '"Ban, Xinxin"'

18. Prussian blue@Au nanoparticles/SiO2 cavity/ITO electrodes: application as a hydrogen peroxide sensor.

Author

Li, Na, Zhou, Hongying, Liu, Yinghong, Yu, Xianjiu, Cao, Lei, Xu, Youjie, Xi, Luxin, Zhao, Gui, and Ban, Xinxin

Subjects
HYDROGEN detectors, STANDARD hydrogen electrode, HYDROGEN peroxide, PRUSSIAN blue, GOLD nanoparticles, MICROELECTRODES
Abstract

We developed a Prussian blue@Au nanoparticles/SiO2-cavities/indium tin oxide (ITO) electrode for a novel non-enzymatic hydrogen peroxide detection. The ordered SiO2 cavities were fabricated on the ITO electrode using the close-packed ordered polystyrene spheres (PS) as templates. The PB@Au nanoparticles were prepared using a two-step process in which gold nanoparticles were deposited at the bottom of the SiO2 cavity by electrochemical methods, while Prussian blue was introduced into the AuNP surface by chemical deposition. The submicron-sized conductive region and the domain-limiting effect of the insulating SiO2 cavity give the electrode the characteristics of a microelectrode, enabling it to exhibit unique electrochemical properties during the electrochemical reduction of H2O2. The proposed PB@Au/SiO2 cavity/ITO electrode was further used for detecting H2O2 with a wide linearity range of 0.08–8 mM and a low detection limit of 0.3 μM. [ABSTRACT FROM AUTHOR]

Published
2024
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21. Developing versatile dendrimer host materials for solution-processed phosphorescence, TADF and multi-resonance narrow-band OLEDs.

Author

Zhang, Wenhao, Yu, Jianmin, Cao, Qingpeng, Qian, Youqiang, Wang, Jiayi, Yang, Caixia, Zhuang, Hongyu, Bian, Wenzhong, Xin, Yumeng, and Ban, Xinxin

Abstract

The host material is crucial for significantly enhancing the performance of solution-processed OLEDs. Herein, two diphenyl-sulfone based dendrimers with highly branched spherical geometry are developed as versatile solution-processible hosts for phosphorescence, thermally activated delayed fluorescence (TADF), and multi-resonance narrow-band emitters. The paddle-like twisted configuration endows the host with a small singlet and triplet splitting (ΔEST) of 0.20 eV and high triplet energy of up to 2.9 eV, which can be qualified for most of the color gamut of solution-processible emitters. In addition, both hosts also exhibit clear AIE properties in the molecular packaging state, promotes the utilization of excitons and efficient energy transfer to guest materials. By using 4Cz-SO as the host, phosphorescent OLEDs achieved the maximum external quantum efficiency (EQE) of 13.7% and 14.5% for blue and white devices, respectively. Moreover, such dendrimers can also be an efficient good host for TADF and multi-resonance narrow-band emitters, both of which achieved a better device efficiency and a small efficiency roll-off than the classical solution-processed host PVK. This work demonstrates the great potential of dendrimer system for developing efficient host materials for solution-processed optoelectronic applications. [ABSTRACT FROM AUTHOR]

Published
2023
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42. Novel C 3 N 4 -Assisted Bilateral Interface Engineering for Efficient and Stable Perovskite Solar Cells.

Author

Shi L, Yuan H, Zhang Y, Sun X, Duan L, Li Q, Huang Z, Ban X, and Zhang D

Abstract

g-C 3 N 4 -assisted interface engineering has been developed as an effective method to improve the efficiency and stability of perovskite solar cells (PSCs). However, most of the reported works used g-C 3 N 4 -induced single-interface modification, which is difficult to passivate the bilateral interfaces of the perovskite layer at the same time. In this paper, we fabricated two kinds of C 3 N 4 materials simultaneously (w-CN and y-CN) after the twice calcination of melamine and used them in the bilateral interface modification toward all-inorganic PSCs. The two kinds of C 3 N 4 play different roles in different interface engineering. On the front interface, w-CN could optimize band level arrangement and improve the perovskite film quality, which contributes to the efficiency of the device. On the back interface, y-CN could also improve the film quality of the perovskite layer, accelerating the extraction of charge carriers. The champion efficiency of the CsPbIBr 2 -based device treated by the bilateral interface is significantly enhanced from 7.8 to 10.1%. Moreover, the modified perovskite film exhibits negligible degradation after 40 min of exposure in the ambient environment with a relative humidity of 70%, while the pristine perovskite film has a rapid degradation within 20 min.

Published
2022
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