碳对电极CsPbBr_3钙钛矿太阳能电池的制备及其光光、热稳定性研究
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摘要
采用两步溶液法制备了无机钙钛矿Cs Pb Br3薄膜,通过增加Pb Br2薄膜在Cs Br甲醇溶液中的反应时间来增加钙钛矿薄膜的厚度并改善薄膜的结晶性,从而提高了无机钙钛矿太阳能电池的光电转换效率。当反应时间从30 min提升至90 min时,电池的效率从1.43%上升至2.84%,这得益于光电流密度得到有效提高。所制备的钙钛矿太阳能电池表现出良好的热稳定性和光稳定性。在最大功率点条件下,全光谱太阳光(AM 1.5,100 m W/cm2)持续照射1 h后,其工作性能保持稳定。在100?C条件下持续加热476 h,电池的效率仍保持在初始效率之上。
Inorganic CsPbBr_3 perovskite films were prepared by two-step solution deposition process. The thickness and crystallinity of CsPbBr_3 perovskite film improved along with the increased immersing time of Pb Br2 film in Cs Br methyl alcohol solution, which helped to boost the efficiency of inorganic perovskite solar cells. The efficiency of inorganic solar cell has improved from 1.43% to2.84% along with the reaction time improved from 30 min to 90 min, which is attributed to the improved photocurrent. The solar cell possesses superior thermostability and photostability. And the output of the device is stable for 1 h while it is exposed to constant full-sun illumination(AM 1.5, 100 m W/cm2) at its maximum power point. The efficiency keeps upon the original efficiency after being constant heating for 476 h at 100?C.
Inorganic CsPbBr_3 perovskite films were prepared by two-step solution deposition process. The thickness and crystallinity of CsPbBr_3 perovskite film improved along with the increased immersing time of Pb Br2 film in Cs Br methyl alcohol solution, which helped to boost the efficiency of inorganic perovskite solar cells. The efficiency of inorganic solar cell has improved from 1.43% to2.84% along with the reaction time improved from 30 min to 90 min, which is attributed to the improved photocurrent. The solar cell possesses superior thermostability and photostability. And the output of the device is stable for 1 h while it is exposed to constant full-sun illumination(AM 1.5, 100 m W/cm2) at its maximum power point. The efficiency keeps upon the original efficiency after being constant heating for 476 h at 100?C.
引文
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[5]CORREA-BAENA J P,SALIBA M,BUONASSISI T,et al.Promises and challenges of perovskite solar cells[J].Science,2017,358(6364):739-744.
[6]GREEN M A,HO-BAILLIE A,SNAITH H J.The emergence of perovskite solar cells[J].Nat Photon,2014,8(7):506-514.
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[11]YUAN Y B,CHAE J,SHAO Y C,et al.Photovoltaic switching mechanism in lateral structure hybrid perovskite solar cells[J].Adv Energy Mater,2015,5(15):1500615.
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[14]MEI A,LI X,LIU L,et al.A hole-conductor-free,fully printable mesoscopic perovskite solar cell with high stability[J].Science,2014,345(6194):295-298.
[15]SALIBA M,MATSUI T,DOMANSKI K,et al.Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance[J].Science,354(6309):206-209.
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[19]DUAN J L,ZHAO Y Y,HE B L,et al.High-purity inorganic perovskite films for solar cells with 9.72%efficiency[J].Angew Chem Int Ed,2018,57(14):3787-3791.
[20]LIU D Y,GANGISHETTY M K,KELLY T L.Effect of CH3NH3Pb I3thickness on device efficiency in planar heterojunction perovskite solar cells[J].J Mater Chem A,2014,2(46):19873-19881.
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[22]GRANCINI G,ROLDAN-CARMONA C,ZIMMERMANN I,et al.One-Year stable perovskite solar cells by2D/3D interface engineering[J].Nat Commun,2017,8:15684.