Thermally Activated Exciton Dissociation and Recombination Control the Carrier Dynamics in Organometal Halide Perovskite
Savenije, Tom J. ; Ponseca, Carlito LU ; Kunneman, Lucas ; Qenawy, Mohamed LU ; Zheng, Kaibo LU ; Tian, Yuxi LU ; Zhu, Qiushi LU ; Canton, Sophie LU ; Scheblykin, Ivan LU
and Pullerits, Tönu
LU
, et al.
(2014)
In The Journal of Physical Chemistry Letters
5(13).
p.2189-2194
- 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 gamma = 13 x 10(-10) cm(3) s(-1) becomes... (More)
- 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 gamma = 13 x 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 (Sigma mu = 16 cm(2)/(V s) at 165 K). Despite the fact that Sigma mu increases, gamma 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. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/4595714
- author
- Savenije, Tom J.
; Ponseca, Carlito
LU
; Kunneman, Lucas
; Qenawy, Mohamed
LU
; Zheng, Kaibo
LU
; Tian, Yuxi
LU
; Zhu, Qiushi
LU
; Canton, Sophie
LU
; Scheblykin, Ivan
LU
and Pullerits, Tönu
LU
, et al. (More)
- Savenije, Tom J.
; Ponseca, Carlito
LU
; Kunneman, Lucas
; Qenawy, Mohamed
LU
; Zheng, Kaibo
LU
; Tian, Yuxi
LU
; Zhu, Qiushi
LU
; Canton, Sophie
LU
; Scheblykin, Ivan
LU
; Pullerits, Tönu
LU
; Yartsev, Arkady
LU
and Sundström, Villy
LU
(Less)
- organization
- publishing date
- 2014
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Letters
- volume
- 5
- issue
- 13
- pages
- 2189 - 2194
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000338693200004
- scopus:84903835047
- ISSN
- 1948-7185
- DOI
- 10.1021/jz500858a
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Max-laboratory (011012005), Chemical Physics (S) (011001060)
- id
- 9553a73a-580b-4e0a-a1d3-585abfad8aa0 (old id 4595714)
- date added to LUP
- 2016-04-01 13:51:14
- date last changed
- 2023-11-12 22:40:21
@article{9553a73a-580b-4e0a-a1d3-585abfad8aa0,
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 gamma = 13 x 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 (Sigma mu = 16 cm(2)/(V s) at 165 K). Despite the fact that Sigma mu increases, gamma 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.}},
author = {{Savenije, Tom J. and Ponseca, Carlito and Kunneman, Lucas and Qenawy, Mohamed and Zheng, Kaibo and Tian, Yuxi and Zhu, Qiushi and Canton, Sophie and Scheblykin, Ivan and Pullerits, Tönu and Yartsev, Arkady and Sundström, Villy}},
issn = {{1948-7185}},
language = {{eng}},
number = {{13}},
pages = {{2189--2194}},
publisher = {{The American Chemical Society (ACS)}},
series = {{The Journal of Physical Chemistry Letters}},
title = {{Thermally Activated Exciton Dissociation and Recombination Control the Carrier Dynamics in Organometal Halide Perovskite}},
url = {{http://dx.doi.org/10.1021/jz500858a}},
doi = {{10.1021/jz500858a}},
volume = {{5}},
year = {{2014}},
}