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Suppressing ion migration in metal halide perovskite via interstitial doping with a trace amount of multivalent cations

Journal Article · · Nature Materials
 [1];  [2];  [3];  [4];  [5];  [6];  [7];  [7];  [7];  [8];  [7];  [9];  [10];  [7];  [6];  [3];  [3];  [11];  [3];  [3] more »;  [7];  [7];  [7];  [8];  [8];  [7];  [3];  [5];  [6];  [6];  [7] « less
  1. Univ. of California, Los Angeles, CA (United States); UCLA
  2. Marmara Univ., Istanbul (Turkey)
  3. Dalian Univ. of Technology (China)
  4. Washington State Univ., Pullman, WA (United States)
  5. Univ. of California, Irvine, CA (United States)
  6. Sungkyunkwan Univ., Suwon (Korea, Republic of)
  7. Univ. of California, Los Angeles, CA (United States)
  8. Westlake Univ., Hangzhou (China)
  9. Univ. of California, Los Angeles, CA (United States); Sungkyunkwan Univ., Suwon (Korea, Republic of)
  10. Washington Univ., St. Louis, MO (United States)
  11. Univ. of California, Los Angeles, CA (United States); Hanyang Univ., Seoul (Korea, Republic of)
+ Show Author Affiliations
Cations with suitable sizes to occupy an interstitial site of perovskite crystals have been widely used to inhibit ion migration and promote the performance and stability of perovskite optoelectronics. However, such interstitial doping inevitably leads to lattice microstrain that impairs the long-range ordering and stability of the crystals, causing a sacrificial trade-off. Here, we unravel the evident influence of the valence states of the interstitial cations on their efficacy to suppress the ion migration. Incorporation of a trivalent neodymium cation (Nd3+) effectively mitigates the ion migration in the perovskite lattice with a reduced dosage (0.08%) compared to a widely used monovalent cation dopant (Na+, 0.45%). As a result, the photovoltaic performances and operational stability of the prototypical perovskite solar cells are enhanced with a trace amount of Nd3+ doping while minimizing the sacrificial trade-off.
Research Organization:
Univ. of California, Los Angeles, CA (United States)
Sponsoring Organization:
National Center for High Performance Computing of Turkey; National Natural Science Foundation of China; National Research Foundation of Korea; Scientific and Technological Research Council of Turkey; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
Grant/Contract Number:
EE0008751
OSTI ID:
1900597
Journal Information:
Nature Materials, Journal Name: Nature Materials Journal Issue: 12 Vol. 21; ISSN 1476-1122
Publisher:
Springer NatureCopyright Statement
Country of Publication:
United States
Language:
English

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