一步沉积法中溴基钙钛矿薄膜的优化及应用
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摘要
溴基钙钛矿太阳电池因其工艺简单、高开压的特性,可在叠层太阳电池、彩色的显示设备和光伏建筑一体化等多方面进行应用而引起人们关注。此文首先研究了一步沉积法中不同溶质前驱体溶液对钙钛矿薄膜形貌和结晶的影响。在优化前驱体溶质条件下,通过加入适量醋酸铵获得均一致密、较大晶粒尺寸、具有择优取向的高质量钙钛矿薄膜,且提高了材料的疏水特性。以Spiro-OMe TAD作为空穴传输层制备器件获得最高1.42 V开路电压、5.87%的电池效率,并在30 d后仍保持89%的效率。
Bromide perovskite solar cells have attracted much attention due to their simple deposition technique and high open-circuit voltage. They can be applied in many aspects,including tandem solar cells,color display devices and photovoltaic building integration. The influence of the precursor solution of different solutes on the morphology and crystallization of perovskite thin film by one-step deposition method was conducted. Under the optimized solute precursor conditions,high quality perovskite thin film with uniform density,larger grain size and preferred orientation were obtained by adding appropriate amount of ammonium acetate,and the hydrophobic characteristics of the materials were improved. The maximum 1. 42 V open-circuit voltage and 5. 87% efficiency are obtained by using Spiro-OMe TAD as a hole transporting layer in the device,and the efficiency is still 89% after 30 d.
Bromide perovskite solar cells have attracted much attention due to their simple deposition technique and high open-circuit voltage. They can be applied in many aspects,including tandem solar cells,color display devices and photovoltaic building integration. The influence of the precursor solution of different solutes on the morphology and crystallization of perovskite thin film by one-step deposition method was conducted. Under the optimized solute precursor conditions,high quality perovskite thin film with uniform density,larger grain size and preferred orientation were obtained by adding appropriate amount of ammonium acetate,and the hydrophobic characteristics of the materials were improved. The maximum 1. 42 V open-circuit voltage and 5. 87% efficiency are obtained by using Spiro-OMe TAD as a hole transporting layer in the device,and the efficiency is still 89% after 30 d.
引文
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[3]Heo J H,Song D H,Im S H.Planar CH3NH3Pb Br3Hybrid Solar Cells with 10.4%Power Conversion Efficiency,Fabricated by Controlled Crystallization in the Spin-Coating Process[J].Advanced Materials,2014,26(48):8179.
[4]Seungchan R,Jun H N,Nam J J,et al.Voltage output of efficient perovskite solar cellswith high open-circuit voltage and fill factor[J].Energy Environ.Sci.,2014,7,2614-2618
[5]Chen S,Hou Y,Chen H,et al.Exploring the Limiting Open-Circuit Voltage and the Voltage Loss Mechanism in Planar CH3NH3Pb Br3Perovskite Solar Cells[J].Advanced Energy Materials,2016,6,1600132.
[6]Yang Y,Yan Y,Yang M,et al.Low surface recombination velocity in solution-grown CH3NH3Pb Br3perovskite single crystal[J].Nature Communications,2015,6:7961.
[7]Yang Y,Yang M,Li Z,et al.Comparison of Recombination Dynamics in CH3NH3Pb Br3and CH3NH3Pb I3Perovskite Films:Influence ofExciton Binding Energy[J].Journal of Physical Chemistry Letters,2015:4688.
[8]Wong A B,Lai M,Eaton S W,et al.Growth and Anion Exchange Conversion of CH3NH3Pb X3Nanorod Arrays for Light-Emitting Diodes[J].Nano Letters,2015,15(8):5519.
[9]Zheng X,Chen B,Wu C,et al.Room temperature fabrication of CH3NH3Pb Br3,by anti-solvent assisted crystallization approach for perovskite solar cells with fast response and small J-V,hysteresis[J].Nano Energy,2015,17:269-278.
[10]Sheng R,Hobaillie A,Huang S,et al.Methylammonium Lead Bromide Perovskite-Based Solar Cells by Vapor-Assisted Deposition[J].Journal of Physical Chemistry C,2015,119(7):3545-3549.
[11]Xiao M,Huang F,Huang W,et al.A fast deposition-crystallization procedure for highly efficient lead iodide perovskite thin-film solar cells.[J].Angewandte Chemie,2014,53(37):9898.
[12]Jeon N J,Noh J H,Kim Y C,et al.Solvent engineering for high-performance inorganic-organic hybrid perovskite solar cells[J].Nature Materials,2014,13(9):897.
[13]Li S S,Chang C H,Wang Y C,et al.Intermixing-seeded growth for high-performance planar heterojunction perovskite solar cells assisted by precursor-capped nanoparticles[J].Energy&Environmental Science,2016,9(4):1282-1289.
[14]Docampo P,Hanusch F C,Stranks S D,et al.Solution Deposition-Conversion for Planar Heterojunction Mixed Halide Perovskite Solar Cells[J].Advanced Energy Materials,2015,4(14):1728.
[15]Wang F,Yu H,Xu H,et al.HPb I3:A New Precursor Compound for Highly Efficient Solution‐Processed Perovskite Solar Cells[J].Advanced Functional Materials,2015,25(7):1120-1126.
[16]Xia Y,Ran C,Chen Y,et al.Management of Perovskite Intermediates for Highly Efficient Inverted Planar Heterojunction Perovskite Solar Cells[J].Journal of Materials Chemistry A,2017,5(7):1326.
[17]Wang K,Liu C,Du P,et al.Bulk Heterojuntion Perovskite Hybrid Solar Cells with Large Fill-Factor[J].Energy&Environmental Science,2015,8(4):1245-1255.
[18]Liang P W,Liao C Y,Chueh C C,et al.Additive Enhanced Crystallization of Solution‐Processed Perovskite for Highly Efficient Planar‐Heterojunction Solar Cells[J].Advanced Materials,2014,26(22):3748-54.
[19]Wu C G,Chiang C H,Tseng Z L,et al.High efficiency stable inverted perovskite solar cells without current hysteresis[J].Energy&Environmental Science,2015,8(9):2725-2733.
[20]Eperon G E.Formamidinium lead trihalide:a broadly tunable perovskite for efficient planar heterojunction solar cells[J].Energy&Environmental Science,2014,7(3):982-988.
[21]Edri E,Kirmayer S,Kulbak M,et al.Chloride Inclusion and Hole Transport Material Doping to Improve Methyl Ammonium Lead Bromide Perovskite-Based High Open-Circuit Voltage Solar Cells[J].Journal of Physical Chemistry Letters,2014,5(3):429-433.