GaInP/GaAs/Ge triple-junction concentrator solar cells with significant efficiency enhancement were demonstrated with antireflective ZnO nanoneedles. The novel nanostructure was attained with a Zn(NO3)2-based solution containing vitamin C. Under one sun AM 1.5G solar spectrum, conversion efficiency of the triple-junction device was improved by 23.7% via broadband improvement in short-circuit cu...

The typical photodetectors can only detect one specific optical spectral band, such as InGaAs and graphene-PbS quantum dots for near-infrared (NIR) light detection, CdS and Si for visible light detection, and ZnO and III-nitrides for UV light detection. So far, none of the developed photodetector can achieve the multicolor detection with arbitrary spectral selectivity, high sensitivity, high sp...

Structure, electric, and resonance properties of (La,Ba)MnO3/ZnO nanostructure grown on SrTiO3 (001) substrate have been investigated. It is found that at room temperature and relatively low voltages (|V |< 0.2 V), the structure shows good rectification behavior with rectification factor near 210. Resistive switching properties are detected after application of higher voltages. Temperature evol...

In this study, we constructed a novel solid state supramolecular system-the molecular cage ZnOTCPP, based on an inorganic/organic hybrid nanostructure, through the assembly of 5,10,15,20-tetra(3-carboxyphenyl)porphyrin (TCPP) onto the surfaces of ZnO nanorod (NR) arrays. The ZnOTCPP molecular cage exhibited highly selective recognition of 5,10,15,20-tetraphenylporphyrin (TPP) by optical and pho...

In solar energy harvesting using cells and photocatalysts, the photoexcitation of electrons holes in semiconductors is first major step conversion. The lifetime carriers, a key factor determining conversion photocatalysis efficiency, shortened mainly by recombination photoexcited carriers. We prepared tested series ZnO/TiO2-based heterostructures search designs which can extend carrier lifetime...

In situ and ex situ time-evolution of photoluminescence data during growth of ZnO/MgO core/shell quantum dots (Qdots) were used to study the stability of the green–white (CIE: 0.32, 0.41) luminescence from ZnO defects. The ZnO/MgO Qdots, synthesized by a sol–gel process, exhibited a quantum yield of 13% compared with less than 5% for ZnO Qdots. The growth of ZnO Qdots was arrested and the defec...

This work mainly focuses on the development of a novel type chemically activated electrodes from cotton yarn by carbonization and chemical activation. Chemical activation is employed in order to obtain high specific capacitance, energy power density. The zinc oxide was prepared sol – gel method pH should be range 9 11. ZnO/CCY electrode it stirred with magnetic stirrer. performance evaluated us...