A Purified, Solvent‐Intercalated Precursor Complex for Wide‐Process‐Window Fabrication of Efficient Perovskite Solar Cells and Modules. (27th May 2019)

• Record Type: Journal Article
• Authors: Ozaki, Masashi; Shimazaki, Ai; Jung, Mina; Nakaike, Yumi; Maruyama, Naoki; Yakumaru, Shinya; Rafieh, Alwani Imanah; Sasamori, Takahiro; Tokitoh, Norihiro; Ekanayake, Piyasiri; Murata, Yasujiro; Murdey, Richard; Wakamiya, Atsushi
• Is Part Of: Angewandte Chemie. Volume 131:Number 28(2019)
• Page Start: 9489
• Page End: 9493
• Publication Date: 2019-05-27
• Subjects: Energieumwandlung -- Materialwissenschaften -- Perowskit-Solarzellen -- Solarmodule -- Spin-Coating; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201902235
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: A high‐purity methylammonium lead iodide complex with intercalated dimethylformamide (DMF) molecules, CH3 NH3 PbI3 ⋅DMF, is introduced as an effective precursor material for fabricating high‐quality solution‐processed perovskite layers. Spin‐coated films of the solvent‐intercalated complex dissolved in pure dimethyl sulfoxide (DMSO) yielded thick, dense perovskite layers after thermal annealing. The low volatility of the pure DMSO solvent extended the allowable time for low‐speed spin programs and considerably relaxed the precision needed for the antisolvent addition step. An optimized, reliable fabrication method was devised to take advantage of this extended process window and resulted in highly consistent performance of perovskite solar cell devices, with up to 19.8 % power‐conversion efficiency (PCE). The optimized method was also used to fabricate a 22.0 cm 2, eight‐cell module with 14.2 % PCE (active area) and 8.64 V output (1.08 V/cell). Abstract : Keine Eile : Hocheffiziente CH3 NH3 PbI3 ‐Perowskit‐Solarzellen (19.8 % PCE) und großflächige Acht‐Zellen‐Module (14.2 % PCE, 8.64 V) wurden aus einem gereinigten Perowskit‐Vorläufermaterial, CH3 NH3 PbI3 ⋅DMF, hergestellt (siehe Bild). Die geringe Flüchtigkeit von reinem DMSO (im Vergleich zu DMF/DMSO) ermöglichte ein längeres Spin‐Coating und eine weniger strenge Präzision der Antisolvenszugabe.