Unexpectedly Strong Auger Recombination in Halide Perovskites
- Univ. of California, Santa Barbara, CA (United States). Dept. of Physics
- Univ. of California, Santa Barbara, CA (United States). Materials Dept.
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Materials Science and Engineering
The emergence of halide perovskites for photovoltaic applications has triggered great interest in these materials for solid-state light emission. Higher order electron–hole recombination processes can critically affect the efficiency of such devices. In the present work, the Auger recombination coefficients are computed in the prototypical halide perovskite, CH3NH3PbI3 (MAPbI3), using first-principles calculations. It is demonstrated that Auger recombination is responsible for the exceptionally high third-order recombination coefficient observed in experiment. The large Auger coefficient is attributed to a coincidental resonance between the bandgap and interband transitions to a complex of higher-lying conduction bands. It is also found that the distortions of PbI6 octahedra contribute significantly to the high Auger coefficient, offering potential avenues for materials design.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division
- Grant/Contract Number:
- AC02-05CH11231; SC0010689
- OSTI ID:
- 1543467
- Alternate ID(s):
- OSTI ID: 1472176
- Journal Information:
- Advanced Energy Materials, Journal Name: Advanced Energy Materials Journal Issue: 30 Vol. 8; ISSN 1614-6832
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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