بهینه سازی و مقایسه عملکرد سلول‌های خورشیدی لایه نازک CZTS و CZTSe

دهقانی, سجاد; امیری, سمانه

بهینه سازی و مقایسه عملکرد سلول‌های خورشیدی لایه نازک CZTS و CZTSe

نوع مقاله : مقاله پژوهشی

نویسندگان

¹ بخش مهندسی نانوالکترونیک، دانشکده فناوری های نوین، دانشگاه شیراز، شیراز، ایران

² دانشگاه شیراز

چکیده

در این مقاله سلول‌های خورشیدی لایه نازک CZTS و CZTSe با ساختار FTO / CdS/ CZTS (CZTSe) / Mo با در نظر گرفتن اثرات بازترکیب و نقص شبیه سازی شده اند . تاثیردما، گاف انرژی، ضخامت و چگالی ناخالصی لایه جاذب و همچنین ضخامت و چگالی ناخالصی لایه بافر بر عملکرد این سلول ها مورد بررسی قرارگرفتند و دو سلول با هم مقایسه شدند. نتایج نشان داد که سلول خورشیدی CZTS دارای ولتاژ مدار باز بزرگتر برابر 0.95 ولت و سلول خورشیدی CZTSe دارای چگالی جریان اتصال کوتاه بزرگتر به میزان 31 میلی آمپر بر سانتی متر مربع می باشند. برای سلول های خورشیدی CZTS و CZTSe در دمای اتاق و در حالت بهینه، به ترتیب بازده %44/17 و %28/14 حاصل شد، که نسبت به سلول های خورشیدی لایه نازک CZTS و CZTSe متداول بهبود چشمگیری حاصل گردیده است. ضمنا نشان داده شد که وابستگی بازده سلول CZTS به دما در مقایسه با سلول CZTSe کمتر است. در کلیه شبیه سازی ها، سلول تحت تابش استاندارد 1/5 AM قرار داشته است.

کلیدواژه‌ها

موضوعات

افزاره های اپتوالکترونیک و فتونیک

عنوان مقاله [English]

Optimization and Performance Comparison of CZTS and CZTSe Thin Film Solar Cells

نویسندگان [English]

Sajjad Dehghani ¹
Samaneh Amiri ²

¹ Department of Nanoelectronics engineering, Faculty of Advance Technologies, Shiraz University, Shiraz, Iran

² Shiraz university

چکیده [English]

In this paper, CZTS and CZTSe thin-film solar cells with FTO / CdS / CZTS (CZTSe)/ Mo structure are simulated, considering the impact of defects and recombination. The effects of temperature, bandgap energy, thickness and doping concentration of the absorber layers, as well as the effects of the thickness and doping concentration of the buffer layer on the cells performance were investigated and compared with each other. It is shown that the CZTS solar cell has a higher open circuit voltage (Voc = 0.95 V) while the CZTSe solar cell has a higher short circuit current density (Jsc = 31 mA / cm2). At 300 k, the maximum efficiencies of 17.44% and 14.28% were obtained for the optimum CZTS and CZTSe cells, respectively. The efficiency has been improved significantly compared to the previous works. It was also shown that the efficiency of CZTS cell is less temperature dependent. All simulations were done under AM1.5 illumination.

کلیدواژه‌ها [English]

Thin film Solar Cells
CZTS
CZTSe
Efficiency

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