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In recent years, studies on network theory have attracted a growing attention, especially, it has become a hot issue to combine the theoretical approach of network with the practical problems. In this paper, we present a new weighted model for public transport network based on network efficiency. Distinguishing from traditional network analysis method, this model considers comprehensively the impact...
In this study, Cu2ZnSnS4 (CZTS) has been fabricated via a low toxicity solvothermal process. Using Cu2O, ZnO, SnO, carbon disulfide and 1-butylamine as starting materials, single-phase CZTS nanoparticles are obtained through a solvothermal reaction at 200 °C for 24 h, and the Cu:Zn:Sn ratio in the as-synthesized CZTS was close to the expected stoichiometric ratio 2:1:1. We also investigated the structure...
Organic-inorganic hybrid methyl ammonium lead halide perovskites have large absorption coefficient and high carrier mobility, which lead to their applications in photovoltaic devices. Recently, solar cells based on perovskite absorber have achieved the record solar-to-electrical power conversion efficiency as high as 15%.1-4 Furthermore, these perovskite solar cells can be fabricated through cost-efficient...
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