研究目的
To demonstrate highly efficient Cu-rich chalcopyrite solar cells from DMF molecular solution by high pressure selenization, overcoming the issue of Cu2-xSe impurity.
研究成果
Highly efficient CISSe and CIGSSe solar cells from Cu-rich absorbers were achieved, demonstrating the potential of high pressure selenization in improving chalcopyrite solar cell efficiency. The Cu-rich absorbers showed stoichiometric composition, smooth surface, high conductivity, and Cu2-xSe free grain boundaries, leading to record efficiencies for solution-processed devices.
研究不足
The study is limited to the fabrication and characterization of Cu-rich chalcopyrite solar cells from DMF solutions under specific selenization conditions. The hazard of high Ar pressure selenization is noted, requiring proper handling.
1：Experimental Design and Method Selection:
The study involved selenizing dimethylformamide (DMF) molecular precursor solution processed precursor films under high Ar pressure to fabricate Cu-rich chalcopyrite solar cells.
2：Sample Selection and Data Sources:
Precursor solutions with varying [Cu]/[In] ratios were prepared and selenized under two different Ar pressures (
3：10 MP and 16 MP). List of Experimental Equipment and Materials:
Equipment included a tube furnace for selenization, SEM, TEM, c-AFM, PL, and GDOES for characterization. Materials included CuCl, InCl3·4H2O, thiourea, and DMF.
4：Experimental Procedures and Operational Workflow:
Precursor films were spin-coated on Mo-coated substrates, annealed, and selenized at 580°C for 20 min under controlled Ar pressure. Post-selenization, films were treated with (NH4)2S solution, followed by CdS buffer layer deposition and device finishing.
5：Data Analysis Methods:
Characterizations included XRD, Raman, SEM, TEM, c-AFM, PL, and GDOES to analyze film properties and device performance.
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