研究目的
Investigating the doping of cadmium telluride (CdTe) thin film solar cells using copper (II) chloride (CuCl2) solution for highly efficient photovoltaic devices.
研究成果
CuCl2 treatment improved the open-circuit voltage and fill factor of CdTe devices compared to Cu doped by evaporation, with an average device efficiency enhancement of ~10% relative. The solution-based CuCl2 treatment yields high-quality results, offering better control of Cu doping density and improved optical properties.
研究不足
The study does not quantify the exact amount of Cu2+ ions that adhere to CdTe, indicating a need for further investigation to estimate Cu concentration and doping profile in CdTe devices after CuCl2 treatment.
1：Experimental Design and Method Selection:
The study involved doping CdTe thin films with CuCl2 solution in deionized water, followed by annealing at various temperatures and durations. The devices were completed with thermally evaporated gold (Au) and measured under simulated AM1.5G spectrum.
2：5G spectrum.
Sample Selection and Data Sources:
2. Sample Selection and Data Sources: CdS/CdTe device stacks were prepared on TEC-15M glass substrate. The CdTe devices were activated with saturated cadmium chloride (CdCl2) solution in methanol.
3：List of Experimental Equipment and Materials:
Equipment included a convection oven for annealing, a thermal evaporator for Au deposition, and a Fianium laser for photoluminescence measurements. Materials included CuCl2 solution, deionized water, and CdTe thin films.
4：Experimental Procedures and Operational Workflow:
The CdTe devices were submerged in CuCl2 solution, annealed, rinsed, and dried before Au deposition. The devices were then laser scribed and measured under AM1.5G solar irradiance.
5：5G solar irradiance.
Data Analysis Methods:
5. Data Analysis Methods: Current-voltage (J-V) characteristics were measured, and photoluminescence (PL) and time-resolved photoluminescence (TRPL) measurements were performed to analyze the optical properties.
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