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High Defect Tolerance in Lead Halide Perovskite CsPbBr3
- Source :
- The journal of physical chemistry letters, vol 8, iss 2
- Publication Year :
- 2017
- Publisher :
- American Chemical Society (ACS), 2017.
-
Abstract
- The formation energies and charge-transition levels of intrinsic point defects in lead halide perovskite CsPbBr3 are studied from first-principles calculations. It is shown that the formation energy of dominant defect under Br-rich growth condition is much lower than that under moderate or Br-poor conditions. Thus avoiding the Br-rich condition can help to reduce the defect concentration. Interestingly, CsPbBr3 is found to be highly defect-tolerant in terms of its electronic structure. Most of the intrinsic defects induce shallow transition levels. Only a few defects with high formation energies can create deep transition levels. Therefore, CsPbBr3 can maintain its good electronic quality despite the presence of defects. Such defect tolerance feature can be attributed to the lacking of bonding-antibonding interaction between the conduction bands and valence bands.
- Subjects :
- Materials science
Valence (chemistry)
Inorganic chemistry
food and beverages
Halide
02 engineering and technology
Electronic structure
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Crystallographic defect
0104 chemical sciences
Chemical physics
Physical Sciences
Chemical Sciences
General Materials Science
Physical and Theoretical Chemistry
0210 nano-technology
Conduction band
Subjects
Details
- ISSN :
- 19487185
- Volume :
- 8
- Database :
- OpenAIRE
- Journal :
- The Journal of Physical Chemistry Letters
- Accession number :
- edsair.doi.dedup.....f7a3aea35f3c47f07b415c3ed907d3ec