Spontaneous formation of robust two-dimensional perovskite phases

Tan S., Shih M., Lu Y., Choi S., Dong Y., Lee J., ...More

Science (New York, N.Y.), vol.388, no.6747, pp.639-645, 2025 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 388 Issue: 6747
  • Publication Date: 2025
  • Doi Number: 10.1126/science.adr1334
  • Journal Name: Science (New York, N.Y.)
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Agricultural & Environmental Science Database, Animal Behavior Abstracts, Applied Science & Technology Source, Aquatic Science & Fisheries Abstracts (ASFA), Artic & Antarctic Regions, ATLA Religion Database, BIOSIS, CAB Abstracts, Chemical Abstracts Core, Communication Abstracts, Computer & Applied Sciences, EBSCO Education Source, Environment Index, Gender Studies Database, Geobase, Linguistic Bibliography, MEDLINE, Metadex, MLA - Modern Language Association Database, Pollution Abstracts, Psycinfo, Veterinary Science Database, zbMATH, DIALNET, Civil Engineering Abstracts, Nature Index
  • Page Numbers: pp.639-645
  • Marmara University Affiliated: Yes

Abstract

The two-dimensional on three-dimensional (2D/3D) perovskite bilayer heterostructure can improve the stability and performance of perovskite solar cells. We show that the 2D/3D perovskite stack in a device evolves dynamically during its end-of-life decomposition. Initially phase-pure 2D interlayers can evolve differently, resulting in different device stabilities. We show that a robust 2D interlayer can be formed using mixed solvents to regulate its crystallinity and phase purity. The resulting 2D/3D devices achieved 25.9% efficiency and had good durability, retaining 91% of their initial performance after 1074 hours at 85°C using maximum power point tracking.