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Efficient and stable poly(3-hexylthiophene) (P3HT):indene-C60 bisadduct (ICBA) based bulk-heterojunction (BHJ) organic solar cells (OSCs) with solution processed MoO3 (s-MoO3) as hole transport layer were fabricated. We used a facile and cost-effective preparation method to obtain a MoO3 aqueous solution by thermal decomposition of (NH4)6Mo7O24·4H2O. The s-MoO3 ultra-thin film was treated in three different ways to compare the effects of the annealing mode: no annealing, 100 °C thermal annealing and ultraviolet (UV) annealing. The transmittance, surface morphology and film quality of the s-MoO3 film can be enhanced by UV annealing treatment, which is favorable to the performance of devices. The OSCs with UV annealing treated s-MoO3 as the hole transport layer exhibit a good power conversion efficiency (PCE) of 5.4% and better stability.

s To achieve a new type of one-way transmission, we design a semi-infinite one-dimensional photonic crystal (PC) coated with a magneto-optical (MO) material film. In the surface of this structure there are merging states of MO defect state and optical Tamm state (OTS). We deduce the dispersion equation of the merging states basing on the Bloch theorem of periodic structures and transfer matrix method. There are two nonreciprocal dispersion curves of the merging states for k x and − k x , respectively. The positions of the merging states can be adjusted through changing the thickness of the MO film. With the use of the attenuated total reflection (ATR) prism coupling, we consider a one-way transmission based on a finite one-dimensional PC structure. The simulations by using a finite element method demonstrate the one-way transmission results.

A high-resolution extreme ultraviolet (EUV) spectrometer has been developed to diagnose the magnetically confined plasmas. A holographic spherical varied line spacing concave grating which provides a flat focal plane is used as the diffraction element working with the grazing incidence angle of 3 degrees. The nominal groove density is 1200 lines x mm(-1). A deeply cooled back-illuminated CCD camera is used as the spectra detector and a mechanical shutter is used to control the time of exposure. It covers the wavelength range of 5-50 nm with the CCD cameral moving along the spectra focal plane to cover different wavelength range interested. Spectrometer design is presented and it was tested by a Penning discharge light source. By the wavelength calibration, the actual parameters of the optical system were calculated and the wavelength accuracy is 0.003 nm. Results show that the spectral resolution is about 0.015 nm at 20 nm with the width of entrance slit opened at 30 microm, which agrees with the design goal.