Mitigation of carrier trapping effects on carrier lifetime measurements with continuous-wave laser illumination for Pb-based metal halide perovskite materials

Lobo N, Matt G, Osvet A, Shrestha S, Kanak A, Fochuk P, Brabec C, Kato M (2024)

Publication Language: English

Publication Type: Journal article

Publication year: 2024

Journal

Book Volume: 135

Article Number: 074905

Journal Issue: 7

DOI: 10.1063/5.0181654

Abstract

We investigated the impact of carrier trapping on the carrier lifetime of metal halide perovskite materials, which are key to solar cell production. We examined NH3CH3PbI3 (MAPbI3), NH3CH3PbBr3 (MAPbBr3), and CsPbBr3 using continuous-wave (CW) laser illumination during microwave photoconductivity decay (μ-PCD) measurements. Traditional pulsed light excitation falls short of mirroring solar cell operating conditions, owing to carrier trapping. Implementing CW laser illumination provides a more accurate estimation of the carrier lifetimes under operational conditions. With an increased photon flux from the CW laser, the μ-PCD decay curves changed, indicating reduced recombination via traps. The experiments revealed extended carrier lifetimes under continuous light for the MAPbI3 polycrystal. This suggests that CW lasers can mitigate trapping effects on carrier lifetime measurements. For the other samples, carrier trapping had a negligible effect on the measured carrier lifetimes. We believe that these findings will aid in the design of perovskite-based devices.

Authors with CRIS profile

Involved external institutions

Nagoya Institute of Technology / 名古屋工業大学 Nagoya Kōgyō Daigaku Japan (JP) Yuriy Fedkovych Chernivtsi National University Ukraine (UA)

How to cite

APA:

Lobo, N., Matt, G., Osvet, A., Shrestha, S., Kanak, A., Fochuk, P.,... Kato, M. (2024). Mitigation of carrier trapping effects on carrier lifetime measurements with continuous-wave laser illumination for Pb-based metal halide perovskite materials. Journal of Applied Physics, 135(7). https://doi.org/10.1063/5.0181654

MLA:

Lobo, Ntumba, et al. "Mitigation of carrier trapping effects on carrier lifetime measurements with continuous-wave laser illumination for Pb-based metal halide perovskite materials." Journal of Applied Physics 135.7 (2024).

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