Modulating Charge-Carrier Dynamics in Mn-Doped All-Inorganic Halide Perovskite Quantum Dots through the Doping-Induced Deep Trap States
(2020) In The Journal of Physical Chemistry Letters 11(9). p.3705-3711- Abstract
Transition-metal ion doping has been demonstrated to be effective for tuning the photoluminescence properties of perovskite quantum dots (QDs). However, it would inevitably introduce defects in the lattice. As the Mn concentration increases, the Mn dopant photoluminescence quantum yield (PLQY) first increases and then decreases. Herein the influence of the dopant and the defect states on the photophysics in Mn-doped CsPbCl3 QDs was studied by time-resolved spectroscopies, whereas the energy levels of the possible defect states were analyzed by density functional theory calculations. We reveal the formation of deep interstitials defects (Cli) by Mn2+ doping. The depopulation of initial QD exciton states is a competition between... (More)
Transition-metal ion doping has been demonstrated to be effective for tuning the photoluminescence properties of perovskite quantum dots (QDs). However, it would inevitably introduce defects in the lattice. As the Mn concentration increases, the Mn dopant photoluminescence quantum yield (PLQY) first increases and then decreases. Herein the influence of the dopant and the defect states on the photophysics in Mn-doped CsPbCl3 QDs was studied by time-resolved spectroscopies, whereas the energy levels of the possible defect states were analyzed by density functional theory calculations. We reveal the formation of deep interstitials defects (Cli) by Mn2+ doping. The depopulation of initial QD exciton states is a competition between exciton-dopant energy transfer and defect trapping on an early time scale (<100 ps), which determines the final PLQY of the QDs. The present work establishes a robust material optimization guideline for all of the emerging applications where a high PLQY is essential.
(Less)
- author
- organization
- publishing date
- 2020-05-07
- type
- Contribution to journal
- publication status
- published
- subject
- in
- The Journal of Physical Chemistry Letters
- volume
- 11
- issue
- 9
- pages
- 7 pages
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:85084379895
- pmid:32329350
- ISSN
- 1948-7185
- DOI
- 10.1021/acs.jpclett.0c01050
- language
- English
- LU publication?
- yes
- id
- cdbc6a5d-afd4-4a26-90b6-8abc51686471
- date added to LUP
- 2020-06-10 10:16:07
- date last changed
- 2024-09-18 23:51:24
@article{cdbc6a5d-afd4-4a26-90b6-8abc51686471, abstract = {{<p>Transition-metal ion doping has been demonstrated to be effective for tuning the photoluminescence properties of perovskite quantum dots (QDs). However, it would inevitably introduce defects in the lattice. As the Mn concentration increases, the Mn dopant photoluminescence quantum yield (PLQY) first increases and then decreases. Herein the influence of the dopant and the defect states on the photophysics in Mn-doped CsPbCl3 QDs was studied by time-resolved spectroscopies, whereas the energy levels of the possible defect states were analyzed by density functional theory calculations. We reveal the formation of deep interstitials defects (Cli) by Mn2+ doping. The depopulation of initial QD exciton states is a competition between exciton-dopant energy transfer and defect trapping on an early time scale (<100 ps), which determines the final PLQY of the QDs. The present work establishes a robust material optimization guideline for all of the emerging applications where a high PLQY is essential.</p>}}, author = {{Meng, Jie and Lan, Zhenyun and Abdellah, Mohamed and Yang, Bin and Mossin, Susanne and Liang, Mingli and Naumova, Maria and Shi, Qi and Gutierrez Alvarez, Sol Laura and Liu, Yang and Lin, Weihua and Castelli, Ivano E. and Canton, Sophie E. and Pullerits, Tönu and Zheng, Kaibo}}, issn = {{1948-7185}}, language = {{eng}}, month = {{05}}, number = {{9}}, pages = {{3705--3711}}, publisher = {{The American Chemical Society (ACS)}}, series = {{The Journal of Physical Chemistry Letters}}, title = {{Modulating Charge-Carrier Dynamics in Mn-Doped All-Inorganic Halide Perovskite Quantum Dots through the Doping-Induced Deep Trap States}}, url = {{http://dx.doi.org/10.1021/acs.jpclett.0c01050}}, doi = {{10.1021/acs.jpclett.0c01050}}, volume = {{11}}, year = {{2020}}, }