title: Achieving Large-Area Planar Perovskite Solar Cells by Introducing an Interfacial Compatibilizer.
abstract: Despite the recent unprecedented increase in the power conversion efficiencies (PCEs) of small-area devices (≤0.1 cm2), the PCEs deteriorate drastically for PSCs of larger areas because of the incomplete film coverage caused by the dewetting of the hydrophilic perovskite precursor solutions on the hydrophobic organic charge-transport layers (CTLs). Here, an innovative method of fabricating scalable PSCs on all types of organic CTLs is reported. By introducing an amphiphilic conjugated polyelectrolyte as an interfacial compatibilizer, fabricating uniform perovskite films on large-area substrates (18.4 cm2) and PSCs with the total active area of 6 cm2(1 cm2× 6 unit cells) via a single-turn solution process is successfully demonstrated. All of the unit cells exhibit highly uniform PCEs of 16.1 ± 0.9% (best PCE of 17%), which is the highest value for printable PSCs with a total active area larger than 1 cm2.
authors.affiliation: Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Jinho
authors.initials: J
authors.lastname: Lee
authors.affiliation: Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.|Department of Chemistry and Centre for Plastic Electronics, Imperial College London, London, SW7 2AZ, UK.
authors.forename: Hongkyu
authors.initials: H
authors.lastname: Kang
authors.affiliation: Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Geunjin
authors.initials: G
authors.lastname: Kim
authors.affiliation: Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Hyungcheol
authors.initials: H
authors.lastname: Back
authors.affiliation: Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Junghwan
authors.initials: J
authors.lastname: Kim
authors.affiliation: Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Soonil
authors.initials: S
authors.lastname: Hong
authors.affiliation: Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Byoungwook
authors.initials: B
authors.lastname: Park
authors.affiliation: Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Eunhag
authors.initials: E
authors.lastname: Lee
authors.affiliation: Department of Nanobio Materials and Electronics, School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.|Research Institute for Solar and Sustainable Energies, Gwangju Institute of Science and Technology, Gwangju, 61005, Republic of Korea.
authors.forename: Kwanghee
authors.initials: K
authors.lastname: Lee
keywords: interfacial compatibilizers; large area; perovskite solar cells; planar; polyelectrolytes