Lead Iodide Redistribution Enables In Situ Passivation for Blading Inverted Perovskite Solar Cells with 24.5% Efficiency

Wang, Xin; Fang, Jun; Li, Sibo; Xie, Guanshui; Lin, Dongxu; Li, Huan; Wang, Daozeng; Huang, Nuanshan; Peng, Haichen; Qiu, Longbin

2024-06-01

10.1002/smll.202404058

SMALL   影响因子和分区

1613-6810

1613-6829

["Blade-coating stands out as an alternative for fabricating scalable perovskite solar cells. However, it demands special control of the precursor composition regarding nucleation and crystallization and currently exhibits lower performance than the spin-coating process. It is mainly the resulting film morphology and excess lead iodide (PbI2) distribution that influences the optoelectronic properties. Here, the effectiveness of introducing N-Methyl-2-pyrrolidone (NMP) to regulate the structure of the perovskite layer and the redistribution of PbI2 is found. The introduction of NMP leads to the accumulation of excess PbI2, mainly on the top surface, reducing residual PbI2 at the perovskite buried interface. This not only facilitates the passivation of perovskite grain boundaries but also eliminates the potential degradation of the PbI2 triggered by light illumination in the perovskite buried interface. The optimized NMP-modified inverted perovskite solar cell achieves a champion efficiency of 24.5%, among the highest reported blade-coated perovskite solar cells. Furthermore, 13.68 cm2 blading perovskite solar modules are fabricated and demonstrate an efficiency of up to 20.4%. These findings underscore that with proper modulation of precursor composition, blade-coating can be a feasible and superior alternative for manufacturing high-quality perovskite films, paving the way for their large-scale applications in photovoltaic technology.","Modulating the redistribution of excess lead iodide in perovskite films by introducing N-Methyl-2-pyrrolidone in the precursor solution, excess lead iodide migrates toward the perovskite film surface during formation, significantly reducing its presence at the buried interface. The blade-coated inverted perovskite solar cells exhibits an efficiency of up to 24.5% and the developed large-area modules achieved 20.3% efficiency. image"]

blade coating in situ passivation inverted perovskite solar cell lead iodide redistribution solvent engineering

SCI ; EI

英语

第一 ; 通讯

Guangdong Basic and Applied Basic Research Foundation["2022A1515010085","2023B1515120008","2021ZT09C064","2021QN02L138"] ; Shenzhen Science and Technology Program["JCYJ20220530115013029","ZDSYS20220527171403009","G03034K001"] ; null[22109067]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001246095700001

WILEY-V C H VERLAG GMBH

Web of Science

Southern Univ Sci & Technol, SUSTech Energy Inst Carbon Neutral, Dept Mech & Energy Engn, Shenzhen Key Lab Intelligent Robot & Flexible Mfg, Shenzhen 518055, Peoples R China

Wang, Xin,Fang, Jun,Li, Sibo,et al. Lead Iodide Redistribution Enables In Situ Passivation for Blading Inverted Perovskite Solar Cells with 24.5% Efficiency[J]. SMALL,2024.

Wang, Xin.,Fang, Jun.,Li, Sibo.,Xie, Guanshui.,Lin, Dongxu.,...&Qiu, Longbin.(2024).Lead Iodide Redistribution Enables In Situ Passivation for Blading Inverted Perovskite Solar Cells with 24.5% Efficiency.SMALL.

Wang, Xin,et al."Lead Iodide Redistribution Enables In Situ Passivation for Blading Inverted Perovskite Solar Cells with 24.5% Efficiency".SMALL (2024).