Nanoscale Perovskite‐Sensitized Solar Cell Revisited: Dye‐Cell or Perovskite‐Cell?. Issue 10 (17th April 2020)

• Record Type: Journal Article
• Authors: Yoo, So‐Min; Lee, Seul‐Yi; Velilla Hernandez, Esteban; Kim, Myoung; Kim, Gitae; Shin, Taeho; Nazeeruddin, Mohammad Khaja; Mora‐Seró, Iván; Lee, Hyo Joong
• Is Part Of: ChemSusChem. Volume 13:Issue 10(2020)
• Page Start: 2571
• Page End: 2576
• Publication Date: 2020-04-17
• Subjects: impedance analysis -- nanostructures -- perovskites -- sensitizers -- solid-state dye-sensitized solar cells; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202000223
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: A general and straightforward way of preparing few‐nanometer‐sized well‐separated MAPbI x Br3− x (MA=methylammonium) perovskite photosensitizers on the surface of an approximately 1 μm thick mesoporous TiO2 photoanode was suggested through a two‐step sequential deposition of low‐concentrated lead halides (0.10–0.30 m PbI2 or PbBr2 ) and methylammonium iodide/bromide (MAI/MABr). When those nanoscale MAPbI x Br3− x perovskites were incorporated as a photosensitizer in typical solid‐state dye‐sensitized solar cells (ss‐DSSCs), it could be verified clearly by the capacitance analysis that nano‐particulate MAPbI3 perovskites play the same role as that of a typical dye sensitizer (MK‐2 molecule) although their size, composition, and structure are different. Abstract : No time to dye : In solid‐state dye‐sensitized solar cells (ss‐DSSCs), conventional molecular dyes are replaced by well‐defined nanoscale MAPbI x Br3− x (MA=methylammonium) perovskites, which are prepared through a simple two‐step deposition by spin‐coating low‐concentrated precursors (≤0.3 m ). These nanoscale perovskite‐sensitizers give a promising initial power conversion efficiency of 7.2 % with much room left for further improvements.