Shuangshuang Liu

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Early life-cycle events play critical roles in determining the population and community dynamics of plants. The ecology of seeds and their germination patterns can determine range limits, adaptation to environmental variation, species diversity, and community responses to climate change. Understanding the adaptive consequences and environmental filtering of(More)
A single walled carbon nanotube (SWCNT) possesses excellent hole conductivity. This work communicates an investigation of perovskite solar cells using a mesoscopic TiO2/Al2O3 structure as a framework in combination with a certain amount of SWCNT-doped graphite/carbon black counter electrode material. The CH3NH3PbI3-based device achieves a power conversion(More)
Porphyrins have been demonstrated as one of the most efficient sensitizers in dye-sensitized solar cells (DSSC). Herein, we investigated a series of porphyrin sensitizers functionalized with various π-spacers, such as phenyl for LD14, thiophene for LW4, thiophene-phenyl for LW5, and 2,1,3-benzothiadiazole (BTD)-phenyl for LW24. Photo-physical investigation(More)
This work introduces cyclopenta[1,2-b:5,4-b']dithiophene (CPDT) as a spacer between the porphyrin chromophore and cyanoacetic acid to obtain a porphyrin dye (coded as LW9). The resultant novel porphyrin dye exhibits extended absorption spectra and a split B band at 520 nm. Therefore, a full spectrum light harvesting characterization of sensitized TiO2(More)
The substitution mechanism of two N₂ ligands in (CNC)Fe-2N₂ replaced by CO was studied theoretically at the B3LYP/LACVP* level. Both SN1 and SN₂ mechanisms were considered. The calculated results for the gas phase suggested that: 1) in SN1 mechanism, N₂ elimination, which involves S₀-T₁ PESs crossing, is the rate control step for both substitution stages.(More)
In planar n-i-p heterojunction perovskite solar cells, the electron transport layer (ETL) plays important roles in charge extraction and determine the morphology of the perovskite film. Here, we report a solution-processed carbon quantum dots (CQDs)/TiO2 composite that has negligible absorption in the visible spectral range, a very attractive feature for(More)
Hybrid lead-halide perovskite solar cells (PSCs) are promising alternatives to silicon-based cells due to their high photovoltaic performance and low cost. We report herein fully printable perovskite solar cells with a mesoporous TiO2/Al2O3/C architecture in combination with mixed-halide MAPbI(3-x)Br(x) perovskites. A maximum conversion efficiency of 13.49%(More)
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