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Effective Carbon Composite Electrode for Lowa??Cost Perovskite Solar Cell with Inorganic CuIn <sub/>0.75</sub> Ga <sub/>0.25</sub> S <sub/>2</sub> HTM
摘要： The perovskite solar cells are well-known as being low cost, solution-based and efficient solar cells, however, the high price of the conventional hole-collector electrode (Spiro-OMeTAD/Gold), the high price and complexity of depositing gold in large scale are major barriers against commercializing them. An effective carbon composite electrode is introduced for a low-cost perovskite solar cell with CuIn0.75Ga0.25S2 hole transport material in this research to solve this problem. The carbon electrode is deposited by the doctor blade method using a paste composed of flakes of graphite, carbon black and a kind of hydrophobic polymer (polystyrene or poly-methyl methacrylate). It is investigated how the weight ratio of carbon black to graphite and type of binder affect sheet resistance and resistivity of carbon composite layer. The effects of carbon electrode composition on the charge transport resistance at the CuIn0.75Ga0.25S2/perovskite interface are investigated using impedance spectroscopy in different light intensities of white light and light with different wavelengths of 530 nm, 660 nm, and 740 nm. The best efficiency of 15.9% is obtained for the champion cell (fabricated outside the glovebox) which is close to the best efficiency of the reference cell with conventional Spiro-OMeTAD/Gold hole-collector that is 16.3%.
关键词： Copper indium gallium sulfide,Hole transport material,Carbon electrode,Perovskite solar cell,Charge transfer resistance
更新于2025-09-16 10:30:52
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Microbial Approach to Low-Cost Production of Photovoltaic Nanomaterials
摘要： Photovoltaic (PV)-generated electricity can participate in renewable grid parity after meeting conditions of low-cost PV materials and economic manufacturing of solar cells. Here, we report low-cost, scalable microbial synthesis of Cu(In,Ga)Se2 (CIGSe) and Cu(In,Ga)S2 (CIGS), which are among the promising candidates to serve as light absorbing layers in solar panels. Microbial synthesis uses reducible chalcophiles and empirically stoichiometric metal components to produce CIGSe and CIGS with band gaps and intra- and intercrystallite compositional homogeneity similar to that produced with traditional techniques. Importantly, microbially produced photovoltaic materials described herein use inexpensive precursor materials at moderate temperatures (65 °C). The microbially facilitated processes do not utilize high temperature, vacuum, or toxic organic solvents. The potential to upscale microbial synthesis without loss of material quality is demonstrated here, indicating a high potential for industrial applications of this technology for production of nanomaterials for PV applications. We estimate that a 50 000 gallon fermentor could generate about 100 kg/month of CIGSe nanoparticles, which could be processed into 0.2 MW of PV cells.
关键词： inexpensive precursor materials,copper indium gallium selenide,Thermoanaerobacter,copper indium gallium sulfide,stoichiometric homogeneity
更新于2025-09-11 14:15:04