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Title: Mixed cation FA x PEA 1- x PbI 3 with enhanced phase and ambient stability toward high-performance perovskite solar cells

In this study, different from the commonly explored strategy of incorporating a smaller cation, MA + and Cs + into FAPbI 3 lattice to improve efficiency and stability, it is revealed that the introduction of phenylethylammonium iodide (PEAI) into FAPbI 3 perovksite to form mixed cation FA xPEA 1–xPbI 3 can effectively enhance both phase and ambient stability of FAPbI 3 as well as the resulting performance of the derived devices. From our experimental and theoretical calculation results, it is proposed that the larger PEA cation is capable of assembling on both the lattice surface and grain boundaries to form quais-3D perovskite structures. The surrounding of PEA + ions at the crystal grain boundaries not only can serve as molecular locks to tighten FAPbI 3 domains but also passivate the surface defects to improve both phase and moisture stablity. Consequently, a high-performance (PCE:17.7%) and ambient stable FAPbI 3 solar cell could be developed
Authors:
 [1] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [2] ;  [3] ;  [2]
  1. Univ. of Washington, Seattle, WA (United States); Tsinghua Univ., Beijing (China)
  2. Univ. of Washington, Seattle, WA (United States)
  3. Tsinghua Univ., Beijing (China)
Publication Date:
Report Number(s):
DOE-UW-Jen-29
Journal ID: ISSN 1614-6832
Grant/Contract Number:
EE0006710
Type:
Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 7; Journal Issue: 1; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Research Org:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Contributing Orgs:
This work was supported by the Office of Naval Research (N00014- 14-1-0246), the Asian Office of Aerospace R&D (FA2386-15-1-4106), the Department of Energy SunShot (DE-EE0006710 ) and the National Natural Science Foundation of China under Grant No. 51273104 and 91433205. A.K.-Y.J. thanks the Boeing-Johnson Foundation for financial support. Computations were conducted through the use of advanced computational, storage, and networking infrastructure provided by the Hyak supercomputer system at the University of Washington, funded by the Student Technology Fee. N.L. thanks China Scholarship Council (201506210171) for financial support. Theoretical research is supported by the National Science Foundation (CHE-1464497 and CHE-1565520 to X.L.).
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 36 MATERIALS SCIENCE
OSTI Identifier:
1343600