A novel interface layer for inverted perovskite solar cells fabricated in ambient air under high humidity conditions

CHOI F. P., Alishah H. M., Bozar S., Doyranli C., KOYUNCU S., SAN N., ...More

SOLAR ENERGY, vol.209, pp.400-407, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 209
  • Publication Date: 2020
  • Doi Number: 10.1016/j.solener.2020.08.013
  • Journal Name: SOLAR ENERGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Agricultural & Environmental Science Database, Applied Science & Technology Source, Communication Abstracts, Compendex, Computer & Applied Sciences, Environment Index, Geobase, INSPEC, Metadex, Civil Engineering Abstracts
  • Page Numbers: pp.400-407
  • Keywords: Benzotriazol based small molecule, Hole transport layer, Electron blocking layer, Planar perovskite solar cells, Inverted structure, Perovskite grain size
  • Çanakkale Onsekiz Mart University Affiliated: Yes

Abstract

A novel benzotriazol based small molecule (2-hexyl-4,7-bis(5'-hexyl-2,2'-bithien-5-yl)-2H-1,2,3-benzotriazole) "BTBT" was synthesized by Suzuki coupling reaction and was successfully employed in planar inverted perovskite solar cells with ITO/BTBT/PEDOT:PSS/CH3NH3PbI3-xCl(x)/PCBM/Al configuration. Fabrication processes, including the spin coating of the perovskite layer, were performed in ambient air, under high humidity conditions (>60%). BTBT/PEDOT:PSS bilayer notably improved the power conversion efficiencies (PCE) from 9.65% to 11.6%, which corresponds to an increase of 20%.