This title appears in the Scientific Report :
2016
Please use the identifier:
http://hdl.handle.net/2128/12557 in citations.
Please use the identifier: http://dx.doi.org/10.1103/PhysRevApplied.6.044017 in citations.
Beyond Bulk Lifetimes: Insights into Lead Halide Perovskite Films from Time-Resolved Photoluminescence
Beyond Bulk Lifetimes: Insights into Lead Halide Perovskite Films from Time-Resolved Photoluminescence
Careful interpretation of time-resolved photoluminescence (TRPL) measurements can substantially improve our understanding of the complex nature of charge-carrier processes in metal-halide perovskites, including, for instance, charge separation, trapping, and surface and bulk recombination. In this w...
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Personal Name(s): | Staub, Florian (Corresponding author) |
---|---|
Hempel, Hannes / Hebig, Jan-Christoph / Mock, Jan / Paetzold, Ulrich W. / Rau, Uwe / Unold, Thomas / Kirchartz, Thomas | |
Contributing Institute: |
Photovoltaik; IEK-5 |
Published in: | Physical review applied, 6 (2016) 4, S. 044017 |
Imprint: |
College Park, Md. [u.a.]
American Physical Society
2016
|
DOI: |
10.1103/PhysRevApplied.6.044017 |
Document Type: |
Journal Article |
Research Program: |
Helmholtz Interdisciplinary Doctoral Training in Energy and Climate Research (HITEC) Solar cells of the next generation |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1103/PhysRevApplied.6.044017 in citations.
Careful interpretation of time-resolved photoluminescence (TRPL) measurements can substantially improve our understanding of the complex nature of charge-carrier processes in metal-halide perovskites, including, for instance, charge separation, trapping, and surface and bulk recombination. In this work, we demonstrate that TRPL measurements combined with powerful analytical models and additional supporting experiments can reveal insights into the charge-carrier dynamics that go beyond the determination of minority-charge-carrier lifetimes. While taking into account doping and photon recycling in the absorber layer, we investigate surface and bulk recombination (trap-assisted, radiative, and Auger) by means of the shape of photoluminescence transients. The observed long effective lifetime indicates high material purity and good passivation of perovskite surfaces with exceptionally low surface recombination velocities on the order of about 10 cm/s. Finally, we show how to predict the potential open-circuit voltage for a device with ideal contacts based on the transient and steady-state photoluminescence data from a perovskite absorber film and including the effect of photon recycling. |