Effect of synthesis methods on photoluminescent properties for CsPbBr3 nanocrystals : Hot injection method and conversion method
(2020) In Journal of Luminescence 220.- Abstract
Multiple facile synthetic strategies for all inorganic perovskite CsPbBr3 nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr3 NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr3 NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated... (More)
Multiple facile synthetic strategies for all inorganic perovskite CsPbBr3 nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr3 NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr3 NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated from the quenchers from the deep trap states. On the other hand, we also observed different radiative recombination rates between two samples which should be due to various trapping/detrapping times prior to the radiative recombination of the charge carriers in two samples. These results provide better guidance for the development and improvement of synthesis methodology for perovskite NCs.
(Less)
- author
- Zhang, Fengying LU ; Chen, Junsheng LU ; Zhou, Ying ; He, Rongxing and Zheng, Kaibo LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Perovskite nanoparticles, Radiative recombination, Synthetic strategy, Trap states
- in
- Journal of Luminescence
- volume
- 220
- article number
- 117023
- publisher
- Elsevier
- external identifiers
-
- scopus:85077374159
- ISSN
- 0022-2313
- DOI
- 10.1016/j.jlumin.2019.117023
- language
- English
- LU publication?
- yes
- id
- f00a18c0-34fb-4d54-b8ea-106d67d5b815
- date added to LUP
- 2020-01-22 16:29:25
- date last changed
- 2023-11-19 22:21:52
@article{f00a18c0-34fb-4d54-b8ea-106d67d5b815, abstract = {{<p>Multiple facile synthetic strategies for all inorganic perovskite CsPbBr<sub>3</sub> nanocrystals (NCs) have been established and developed, profiting from their excellent performance and great potential applied in the field of photonic and optoelectronic. Here, CsPbBr<sub>3</sub> NCs were synthesized by both hot injection method (method 1) and conversion method (method 2), and the discrepancy of their photophysical properties is elucidated via the complementary studies between time-resolved photoluminescence (TRPL) and transient-absorption (TA) spectroscopy. We found that CsPbBr<sub>3</sub> NCs prepared by conversion method exhibited lower PL quantum yield (QY), which was ascribed to the larger partition of the NCs being passivated from the quenchers from the deep trap states. On the other hand, we also observed different radiative recombination rates between two samples which should be due to various trapping/detrapping times prior to the radiative recombination of the charge carriers in two samples. These results provide better guidance for the development and improvement of synthesis methodology for perovskite NCs.</p>}}, author = {{Zhang, Fengying and Chen, Junsheng and Zhou, Ying and He, Rongxing and Zheng, Kaibo}}, issn = {{0022-2313}}, keywords = {{Perovskite nanoparticles; Radiative recombination; Synthetic strategy; Trap states}}, language = {{eng}}, publisher = {{Elsevier}}, series = {{Journal of Luminescence}}, title = {{Effect of synthesis methods on photoluminescent properties for CsPbBr<sub>3</sub> nanocrystals : Hot injection method and conversion method}}, url = {{http://dx.doi.org/10.1016/j.jlumin.2019.117023}}, doi = {{10.1016/j.jlumin.2019.117023}}, volume = {{220}}, year = {{2020}}, }