Preparation of mixed-ion and inorganic perovskite films using water and isopropanol as solvents for solar cell applications†,Sustainable Energy & Fuels

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Preparation of mixed-ion and inorganic perovskite films using water and isopropanol as solvents for solar cell applications†
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2017-12-14 00:00:00 , DOI: 10.1039/c7se00538e
Kári Sveinbjörnsson _{1,

2,

3,

4,

5} , Nan Kyi Kyi Thein _{1,

2,

3,

4,

5} , Zahra Saki _{1,

2,

3,

4,

5} , Sebastian Svanström _{1,

4,

5,

6,

7} , Wenxing Yang _{1,

2,

3,

4,

5} , Ute B. Cappel _{1,

4,

5,

6,

7} , Håkan Rensmo _{1,

4,

5,

6,

7} , Gerrit Boschloo _{1,

2,

3,

4,

5} , Kerttu Aitola _{1,

2,

3,

4,

5} , Erik M. J. Johansson _{1,

2,

3,

4,

5}

Affiliation

Presently, the most efficient lead halide perovskite solar cells are manufactured by using high-boiling point organic solvents to dissolve the perovskite precursor materials prior to the perovskite formation. Previously, efforts have been made to exchange the said solvents for water with some success. Herein, we build on that work to develop a procedure for synthesising perovskite absorbers using only water and isopropanol as solvents. Our technique can be utilised for fabricating many different perovskite compositions, organic and inorganic. The technique is based on the high solubility of metal nitrates, such as lead(II) nitrate and caesium(I) nitrate, in water and, respectively, their poor solubilities in isopropanol. The inclusion of CsNO₃ to Pb(NO₃)₂ films does not result in a phase separation of the perovskite material as one would expect when using lead(II) halide precursor films. Using the perovskite composition Cs_0.1FA_0.9Pb(I_0.83Br_0.17)₃ we were able to reach an average solar cell power conversion efficiency of 13.0%. Furthermore, the technique can be applied to many different perovskite compositions making it appealing for large-scale manufacturing of perovskite solar cells.

中文翻译：

以水和异丙醇为溶剂，制备混合离子和无机钙钛矿薄膜，用于太阳能电池应用†

当前，最有效的卤化铅钙钛矿太阳能电池是通过使用高沸点有机溶剂在钙钛矿形成之前溶解钙钛矿前体材料来制造的。以前，已经做出努力将所述溶剂换成水，并取得了一些成功。在此，我们以这项工作为基础，开发了仅用水和异丙醇为溶剂合成钙钛矿吸收剂的程序。我们的技术可用于制造许多不同的钙钛矿成分，包括有机和无机的。该技术基于金属硝酸盐（例如硝酸铅（II）和硝酸铯（I））在水中的高溶解度以及它们在异丙醇中的较差的溶解度。CsNO ₃包含在Pb（NO₃）_2个膜不会导致钙钛矿材料发生相分离，这与使用卤化铅（ II）前体膜时所期望的相分离。使用钙钛矿组合物Cs_0.1 FA_0.9 Pb（I_0.83 Br_0.17）_3，我们能够达到13.0％的平均太阳能电池功率转换效率。此外，该技术可以应用于许多不同的钙钛矿组合物，使其对于钙钛矿太阳能电池的大规模制造具有吸引力。

更新日期：2017-12-14

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