2020
DOI: 10.1002/adfm.202004312
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Charge‐Carrier Trapping and Radiative Recombination in Metal Halide Perovskite Semiconductors

Abstract: Trap-related charge-carrier recombination fundamentally limits the performance of perovskite solar cells and other optoelectronic devices. While improved fabrication and passivation techniques have reduced trap densities, the properties of trap states and their impact on the charge-carrier dynamics in metal-halide perovskites are still under debate. Here, a unified model is presented of the radiative and nonradiative recombination channels in a mixed formamidinium-cesium lead iodide perovskite, including charg… Show more

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Cited by 82 publications
(96 citation statements)
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References 66 publications
(62 reference statements)
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“…For both films, we observe two features: a rapid decay within the first 5 ns followed by an almost monoexponential slower decay. The fast decay at early times has been attributed to initial carrier trapping, 54 and hole transfer, 55 whereas the following slower decay, is caused by non-radiative recombination. 56 Note that with the low fluences used here, radiative bimolecular and non-radiative Auger recombination are negligible.…”
Section: Resultsmentioning
confidence: 99%
“…For both films, we observe two features: a rapid decay within the first 5 ns followed by an almost monoexponential slower decay. The fast decay at early times has been attributed to initial carrier trapping, 54 and hole transfer, 55 whereas the following slower decay, is caused by non-radiative recombination. 56 Note that with the low fluences used here, radiative bimolecular and non-radiative Auger recombination are negligible.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, the diffusion rate of the mobile ions has been shown to decrease when long chain alkylammonium cations are used in low‐dimensional perovskites, which could further contribute to constraining the ionic movement at the HTL/perovskite interface of the 2 mg PEAI deposited device. [ 34 ]…”
Section: Resultsmentioning
confidence: 99%
“…The value of μ in the prototypical polycrystalline MAPbI 3 was reported in the range from 0.2 to 100 cm 2 V −1 second −1 . The charge carrier properties of halide perovskites are largely dependent on their crystal size and structure 26,39‐42 . Xing et al uncovered that the solution processed polycrystalline MAPbI 3 had a long‐range, balanced electron‐hole diffusion length of at least 100 nm 43 .…”
Section: Structure and Properties Of Halide Perovskitesmentioning
confidence: 99%