BROWSE

Related Researcher

Author's Photo

Seok, Sang Il
Laboratory for Energy Harvesting Materials and Systems (LEHMS)
Research Interests
  • Solar energy conversion, perovskite solar cells, inorganic-organic hybrid materials and processing, solution chemistry

ITEM VIEW & DOWNLOAD

Impact of strain relaxation on performance of alpha-formamidinium lead iodide perovskite solar cells

Cited 0 times inthomson ciCited 0 times inthomson ci
Title
Impact of strain relaxation on performance of alpha-formamidinium lead iodide perovskite solar cells
Author
Kim, GwisuMin, HanulLee, Kyoung SuLee, Do YoonYoon, So MeSeok, Sang Il
Issue Date
2020-10
Publisher
AMER ASSOC ADVANCEMENT SCIENCE
Citation
SCIENCE, v.370, no.6512, pp.108 - +
Abstract
High-efficiency lead halide perovskite solar cells (PSCs) have been fabricated with alpha-phase formamidinium lead iodide (FAPbI(3)) stabilized with multiple cations. The alloyed cations greatly affect the bandgap, carrier dynamics, and stability, as well as lattice strain that creates unwanted carrier trap sites. We substituted cesium (Cs) and methylenediammonium (MDA) cations in FA sites of FAPbI(3) and found that 0.03 mol fraction of both MDA and Cs cations lowered lattice strain, which increased carrier lifetime and reduced Urbach energy and defect concentration. The best-performing PSC exhibited power conversion efficiency >25% under 100 milliwatt per square centimeter AM 1.5G illumination (24.4% certified efficiency). Unencapsulated devices maintained >80% of their initial efficiency after 1300 hours in the dark at 85 degrees C.
URI
https://scholarworks.unist.ac.kr/handle/201301/48872
URL
https://science.sciencemag.org/content/370/6512/108
DOI
10.1126/science.abc4417
ISSN
0036-8075
Appears in Collections:
ECHE_Journal Papers
Files in This Item:
There are no files associated with this item.

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qrcode

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU