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Zhenqing Yang,Juan Li,Yun Liu,Wansong Zhang 한국물리학회 2017 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.70 No.8
Based on an experimentally synthesized p-type dye QT-1, we screened and designed a series of quinoid-based “push-pull” dyes SPL401 - SPL407 by modifying the -conjugated linker for ptype dye-sensitized solar cells (p-type DSSC). Further, we systematically calculated their electronic and optical properties by using the density functional theory (DFT) and the time-dependent DFT (TDDFT). The results indicate that compared to QT-1, SPL406 and SPL407, which have not only smaller energy gaps, higher oscillator strength f increased by 70% and 80%, and 141 nm and 110 nm redshifts, respectively, but also a broader absorption spectrum covering the entire visible range to the near-IR region of 1200 nm, may be the most promising candidates among SPL401 - SPL407 for p-type organic sensitizers.
Growth and Scintillation Characterizations of SrMoO4 Single Crystals
Hua Jiang,Gul Rooh,H.J. Kim,H. Park,J. H. So,김성환,S.K.Kim,Y.D.Kim,Wansong Zhang 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.10
Transparent crack-free samples of SrMoO<sub>4</sub> single crystals are grown by using the Czochralski method. X-ray diffraction results confirmed a single phase of the grown crystals. Photoluminescence and X-ray-induced emission spectra showed a broad emission band in the wavelength range from 380 to 750 nm. The decay time curve contained two decay-time components of 0.7 ± 0.5 ns (20%) and 943 ± 50 ns (80%) at room temperature. Temperature dependences of the scintillation light yield and the decay time of the SrMoO<sub>4</sub> crystal are also presented. Changes in the light yield and the decay time are observed at temperatures between 10 and 250 K. The light yield of SrMoO<sub>4</sub> at 70 K is found to be three times higher than that at 250 K. The decay time of SrMoO<sub>4</sub> get slower as the temperature decreases.