研究目的
Investigating the effect of solution-processed CuSCN and AgSCN as doping sources on the performance of CdTe solar cells.
研究成果
Solution-processed CuSCN and AgSCN can effectively serve as doping sources in CdTe solar cells, achieving power conversion efficiencies of 17.1% and 16.2%, respectively. CuSCN offers dual functionality as a hole transport layer and doping source, while AgSCN provides a slower diffusion rate, potentially improving device stability.
研究不足
The study highlights the potential of CuSCN and AgSCN as doping sources but notes the higher resistivity of AgSCN may limit its effectiveness compared to CuSCN. The long-term stability of AgSCN-doped devices was suggested but not extensively tested.
1：Experimental Design and Method Selection:
The study employed solution-processed CuSCN and AgSCN as doping sources in CdTe solar cells to investigate their effects on device performance.
2：Sample Selection and Data Sources:
Commercial TEC15 (Fluorine doped SnO2 coated soda lime glass) was used as the substrate for CdTe solar cells.
3：List of Experimental Equipment and Materials:
CuSCN (99% Sigma-Aldrich), AgSCN (99% Sigma-Aldrich), diethyl sulfide (DES, 98%, Sigma Aldrich), magnetron sputtering system, Stylus profiler (Dektak II), solar simulator (Newport, Oriel Class AAA 94063A), source meter (Keithley 2420), calibrated Si-reference cell and meter (Newport, 91150V), solar cell spectral response measurement system (QE-T, Enli Technology, Co. Ltd).
4：Experimental Procedures and Operational Workflow:
CdTe solar cells were fabricated by CSS deposition. CuSCN and AgSCN solutions were prepared, spin-coated on CdTe surfaces, and the thickness was controlled. The back contact was screen printed graphite. Device performance was measured under AM
5：5G irradiation. Data Analysis Methods:
Device performance parameters (Voc, Jsc, FF, PCE) were analyzed, and EQE spectra were characterized.
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CuSCN
99%
Sigma-Aldrich
Used as a Cu doping source and hole transport layer in CdTe solar cells.
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AgSCN
99%
Sigma-Aldrich
Used as an Ag doping source in CdTe solar cells.
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Diethyl sulfide
98%
Sigma Aldrich
Solvent for dissolving CuSCN and AgSCN.
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Stylus profiler
Dektak II
Measuring the thickness of CuSCN and AgSCN layers.
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Solar simulator
Oriel Class AAA 94063A
Newport
Simulating sunlight for solar cell testing.
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Source meter
Keithley 2420
Measuring electrical characteristics of solar cells.
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Calibrated Si-reference cell and meter
91150V
Newport
Calibrating the solar simulator.
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Solar cell spectral response measurement system
QE-T
Enli Technology, Co. Ltd
Characterizing external quantum efficiency (EQE) of solar cells.
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