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Heterogeneous Integration of Three-primary-color Photoluminescent Nanoparticle Arrays with Defined Interface
摘要： Minimized photoluminescent devices require both high-density fluorescent arrays and minimal cross-talk between neighboring pixels on the limited area. However, the challenges to achieve the overall integration of nanomaterials-based devices hinder the development of microscale full-color displays, including micro/nanoarray density, orientation control, multimaterials interface morphology and uniform colors. Here, we report a heterogeneous integration approach to control the orientation, combination and density of fluorescent micro/nanoarrays on flexible substrates. Through controlling the defined interface and critical shrinkage width of liquid bridges, the width of three-primary-color micro/nanolines reaches 100 nm. The interval between two parallel luminous lines is down to 40 μm, and the optical cross-talk effect is remarkably reduced. This work provides a facile approach to prepare high performance micro-photoluminescent and imaging arrays for next-generation flexible display and lighting technology.
关键词： Arrays,Integration,Three-primary-color,Defined interface,Heterogeneous
更新于2025-09-04 15:30:14
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Dynamic Characteristics of Satellite Solar Arrays under the Deployment Shock in Orbit
摘要： Understanding the dynamic characteristics of solar arrays is important for satellite structural design and attitude control design. Considerable theoretical researches have been carried out towards this problem, but they have not been supported by actual orbit data from outer space yet. In this paper, the on-orbit vibration characteristic data of solar arrays under the deployment shock are measured by using vibration measurement apparatuses based on structural strain. With these valuable experimental data, more eigenfrequencies of the solar arrays in the microgravity environment are obtained, and the prediction that the vibration of solar arrays will have larger amplitude and longer decay time under vacuum conditions is veri?ed. Moreover, by comparing the eigenfrequency of main vibration under the space condition with that under the ground condition, the accurate value of the system damping ratio is gained, which has an important guideline signi?cant for the structural design of solar arrays.
关键词： solar arrays,deployment shock,on-orbit data,vibration measurement,dynamic characteristics
更新于2025-09-04 15:30:14
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WO3/BiVO4 Type-II Heterojunction Arrays Decorated with Oxygen-deficient ZnO Passivation Layer: a Highly Efficient and Stable Photoanode
摘要： In present work, we report a ternary WO3/BiVO4/ZnO photoanode with boosted PEC efficiency and stability towards highly efficient water splitting. The type-II WO3/BiVO4 heterojunction arrays are firstly prepared by hydrothermal growth of WO3 nanoplate arrays onto the substrates of ?uorine-doped tin oxide (FTO) coated glasses, followed by spin-coating of BiVO4 layers onto the WO3 nanoplate surfaces. After that, thin ZnO layers are further introduced onto the WO3/BiVO4 heterojunction arrays via atomic layer deposition (ALD), leading to the construction of ternary WO3/BiVO4/ZnO photoanodes. It is verified that the ZnO thin layer in WO3/BiVO4/ZnO photoanode contains abundant oxygen vacancies, which could be acted as an effective passivation layer to enhance the charge separation and surface water oxidation kinetics of photogenerated carriers. The as-prepared WO3/BiVO4/ZnO photoanode produces a photocurrent of 2.96 mA cm-2 under simulated sunlight with an incident photon-to-current conversion e?ciency (IPCE) of ～72.8 % at 380 nm at a potential of 1.23 V vs. RHE without cocatalysts, both of which are comparable to the state-of-art WO3/BiVO4 counterparts. Moreover, the photocurrent of WO3/BiVO4/ZnO photoanode shows only 9 % decay after 6 h, suggesting its high photoelectrochemical (PEC) stability.
关键词： type-II heterojunction,WO3/BiVO4,nanoplate arrays,photoelectrochemistry,passivation layer
更新于2025-09-04 15:30:14