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Cited by 558

The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.

Thermally Activated Exciton Dissociation and Recombination Control the Carrier Dynamics in Organometal Halide Perovskite

Open access
Savenije, Tom J., Ponseca, Carlito S., Kunneman, Lucas, Abdellah, Mohamed, Zheng, Kaibo, Tian, Yuxi, Zhu, Qiushi, Canton, Sophie E., Scheblykin, Ivan G., Pullerits, Tonu, Yartsev, Arkady, Sundström, Villy·2014·The Journal of Physical Chemistry Letters
DOI 10.1021/jz500858a
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Abstract

Solar cells based on organometal halide perovskites have seen rapidly increasing efficiencies, now exceeding 15%. Despite this progress, there is still limited knowledge on the fundamental photophysics. Here we use microwave photoconductance and photoluminescence measurements to investigate the temperature dependence of the carrier generation, mobility, and recombination in (CH3NH3)PbI3. At temperatures maintaining the tetragonal crystal phase of the perovskite, we find an exciton binding energy of about 32 meV, leading to a temperature-dependent yield of highly mobile (6.2 cm(2)/(V s) at 300 K) charge carriers. At higher laser intensities, second-order recombination with a rate constant of γ = 13 × 10(-10) cm(3) s(-1) becomes apparent. Reducing the temperature results in increasing charge carrier mobilities following a T(-1.6) dependence, which we attribute to a reduction in phonon scattering (Σμ = 16 cm(2)/(V s) at 165 K). Despite the fact that Σμ increases, γ diminishes with a factor six, implying that charge recombination in (CH3NH3)PbI3 is temperature activated. The results underline the importance of the perovskite crystal structure, the exciton binding energy, and the activation energy for recombination as key factors in optimizing new perovskite materials.

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Metadata

Authors
Savenije, T. J., Ponseca, C. S., Kunneman, L., Abdellah, M., Zheng, K., Tian, Y., Zhu, Q., Canton, S. E., Scheblykin, I. G., Pullerits, T., Yartsev, A., & Sundström, V.
Venue
The Journal of Physical Chemistry Letters
Publisher
American Chemical Society (ACS)
Published
2014-06-12
Volume
5
Issue
13
Pages
2189-2194
ISSN
1948-7185 (ISSN-L)
DOI
10.1021/jz500858a
OpenAlex
W2020043850
Cited by
558
References
27
FWCI
32.72
Type
journal article
Language
en
Open access
green

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