افزایش پایداری سلول‌های خورشیدی با استفاده از لایه‌های جاذب پروسکایتی CH3NH3PbI3 آلاییده با برم

نوع مقاله : مقاله پژوهشی

نویسندگان

دانشگاه صنعتی شاهرود

چکیده

ترکیب CH3NH3PbI3 یکی از معروف­ترین و پرکاربردترین ترکیبات پروسکایتی هالیدی بر پایه سرب است که در سلول­های خورشیدی پرووسکایتی استفاده می­شود. یکی از راه­های مقابله با مسأله ناپایداری این ساختار پروسکایتی در شرایط معمولی، آلایش برم در این ترکیب است. در این کار، ضمن بررسی ویژگی­های ساختاری و نوری لایه­های جاذب CH3NH3PbI3 آلاییده با برم (با نسبت­های مولی برم به ید 1:0، 3:1، 2:1، 1:1، 1:2، 0:1) که به روش دومرحله ای چرخشی- چرخشی تهیه شدند، پارامترهای فوتوولتایی سلول­های ساخته ­شده برپایه این لایه­های جاذب نیز اندازه­گیری و تحلیل شدند. تغییرات مقادیر پارامترهای فوتوولتایی در مدت 162 روز از ساخت سلول­ها به­ طور مرتب اندازه­گیری شدند. نتایج بررسی­ها نشان داد که با وجود اینکه سلول شامل ترکیب پروسکایتی بدون آلایش برم دارای بیشترین بازده اندازه­گیری شده در روز ساخت (65/11%) است، ولی به ­مرور ­زمان دچار افت شدید بازده (86%) می­گردد. مقایسه نتایج به­دست­آمده نشان داد که کمترین میزان افت بازده (1%) مربوط به سلول دارای لایه جاذب آلاییده با نسبت مولی برم به ید 1:1 با بازده تبدیل انرژی 9% است.     

کلیدواژه‌ها

عنوان مقاله [English]

Increasing of solar cell stability using Br-doped CH3NH3PbI3 perovskite absorber layers

نویسندگان [English]

  • Maryam Alidaei
  • morteza Izadifard
  • mohammad Ebrahim Ghazi
چکیده [English]

The CH3NH3PbI3 is one of the most widely used and famous lead halide perovskite absorber layer for using in perovskite solar cells. One of the ways to deal with the instability problem of this perovskite structure in environmental condition is bromide doping in this composition. In this work, the structural and optical properties of the bromide doped CH3NH3PbI3 absorber layers were studied as well as J-V characteristics of solar cell devices based on this absorber layer were also measured and analyzed. Photovoltaic parameters of the fabricated solar cell were measured continuously for 162 days. The results of this study showed that even though the bromide-free perovskite devices has the highest PCE (11.65%), but suffer from a significant drop in PCE (86%) during the measured time period . Comparison of the results showed that the lowest rate of efficiency loss (1%) was obtained for the solar cell with a 1: 1 molar iodine-bromide ratio with an energy conversion efficiency of 9%.

کلیدواژه‌ها [English]

  • Perovskite absorber layer
  • Two-step spin coating technique
  • CH3NH3PbI3-xBrx absorber layers
  • Perovskite solar cell stability
  • Hybrid organic-inorganic halide perovskite
  • Power conversion efficiency (PCE)

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مجله بلورشناسی و کانی شناسی ایران
دوره 27، شماره 1 - شماره پیاپی 73
فروردین 1398
صفحه 231-244

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  • تاریخ دریافت: 28 فروردین 1397
  • تاریخ بازنگری: 07 تیر 1397
  • تاریخ پذیرش: 14 مرداد 1397

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