Facile fabrication of perovskite layers with large grains through a solvent exchange approach†,Inorganic Chemistry Frontiers

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Facile fabrication of perovskite layers with large grains through a solvent exchange approach†
Inorganic Chemistry Frontiers ( IF 6.1 ) Pub Date : 2017-12-04 00:00:00 , DOI: 10.1039/c7qi00685c
Ying-Ke Ren _{1,

2,

3,

4} , Xiao-Qiang Shi _{1,

2,

3,

4} , Xi-Hong Ding _{1,

2,

3,

4} , Jun Zhu _{5,

6,

7,

8,

9} , Tasawar Hayat _{10,

11,

12,

13,

14} , Ahmed Alsaedi _{10,

11,

12,

13,

14} , Zhao-Qian Li _{15,

16,

17,

18,

19} , Xiao-Xiao Xu _{15,

16,

17,

18,

19} , Shang-Feng Yang _{4,

20,

21} , Song-Yuan Dai _{1,

2,

3,

4,

10}

Affiliation

Beijing Key Laboratory of Novel Thin-Film Solar Cells
North China Electric Power University
Beijing
China
Key Lab of Special Display Technology
Ministry of Education
National Engineering Lab of Special Display Technology
State Key Lab of Advanced Display Technology
Academy of Opto-Electronic Technology
NAAM Research Group
Department of Mathematics
Faculty of Science
King Abdulaziz University
Jeddah 21589
Key Laboratory of Photovolatic and Energy Conservation Materials
Institute of Applied Technology
Hefei Institutes of Physical Science
Chinese Academy of Sciences
Hefei
University of Science and Technology of China
Hefei 230026

Large-grained perovskite layers with fewer defects are beneficial to minimize carrier recombination at grain boundaries, thus boosting cell performance. Here, we present a facile solvent exchange strategy (SES) to yield large-grained perovskite films with high reproducibility. Upon employing a stoichiometric PbI₂ : MAI : DMSO (3 : 2 : 2) precursor solution, we reduced the number of colloidal intermediates (PbI₄²⁻) which is correlated with the nucleation of seeds, resulting in a perovskite thin layer with large grain sizes up to 2 μm. The SES prepared CH₃NH₃PbI₃ devices show significantly reduced grain boundaries corresponding to the decrease of recombination centers, which dramatically boosted the efficiency up to 17.2%.

中文翻译：

通过溶剂交换方法可轻松制造具有大晶粒的钙钛矿层†

缺陷少的大晶粒钙钛矿层有利于最大程度地减少晶界处的载流子复合，从而提高电池性能。在这里，我们提出了一种简便的溶剂交换策略（SES），以生产具有高重现性的大颗粒钙钛矿薄膜。采用化学计量的PbI ₂ ：MAI：DMSO（3：2：2）前体溶液时，我们减少了与种子成核相关的胶体中间体（PbI ₄^2-）的数量，从而形成了钙钛矿薄层，具有较大的晶粒尺寸最大为2μm。SES制备CH ₃ NH ₃ PbI ₃ 器件显示出明显减少的晶界，这与重组中心的减少相对应，这极大地提高了效率，达到了17.2％。

更新日期：2017-12-04

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