Perovskite solar cells based on screen-printed thin films

Changshun Chen, Jianxin Chen, Huchen Han, Lingfeng Chao, Jianfei Hu, Tingting Niu, He Dong, Songwang Yang, Yingdong Xia, Yonghua Chen () and Wei Huang ()
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Changshun Chen: Nanjing Tech University (NanjingTech)
Jianxin Chen: Nanjing Tech University (NanjingTech)
Huchen Han: Nanjing Tech University (NanjingTech)
Lingfeng Chao: Nanjing Tech University (NanjingTech)
Jianfei Hu: Nanjing Tech University (NanjingTech)
Tingting Niu: Nanjing Tech University (NanjingTech)
He Dong: Northwestern Polytechnical University
Songwang Yang: Chinese Academy of Sciences
Yingdong Xia: Nanjing Tech University (NanjingTech)
Yonghua Chen: Nanjing Tech University (NanjingTech)
Wei Huang: Nanjing Tech University (NanjingTech)

Nature, 2022, vol. 612, issue 7939, 266-271

Abstract: Abstract One potential advantage of perovskite solar cells (PSCs) is the ability to solution process the precursors and deposit films from solution1,2. At present, spin coating, blade coating, spray coating, inkjet printing and slot-die printing have been investigated to deposit hybrid perovskite thin films3–6. Here we expand the range of deposition methods to include screen-printing, enabled by a stable and viscosity-adjustable (40–44,000 cP) perovskite ink made from a methylammonium acetate ionic liquid solvent. We demonstrate control over perovskite thin-film thickness (from about 120 nm to about 1,200 nm), area (from 0.5 × 0.5 cm2 to 5 × 5 cm2) and patterning on different substrates. Printing rates in excess of 20 cm s−1 and close to 100% ink use were achieved. Using this deposition method in ambient air and regardless of humidity, we obtained the best efficiencies of 20.52% (0.05 cm2) and 18.12% (1 cm2) compared with 20.13% and 12.52%, respectively, for the spin-coated thin films in normal devices with thermally evaporated metal electrodes. Most notably, fully screen-printing devices with a single machine in ambient air have been successfully explored. The corresponding photovoltaic cells exhibit high efficiencies of 14.98%, 13.53% and 11.80% on 0.05-cm2, 1.00-cm2 and 16.37-cm2 (small-module) areas, respectively, along with 96.75% of the initial efficiency retained over 300 h of operation at maximum power point.

Date: 2022
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DOI: 10.1038/s41586-022-05346-0

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