Super‐Absorber, Super‐Bright, Nearly‐Non‐Blinking CsPbI<sub>3</sub> Perovskite Nanocrystal
Abstract Gigantic magnitude of molar extinction coefficient ( ɛ ) (≈2 × 10 8 m −1 cm −1 ) and PLQY (0.98) through Zn‐alloying and surface‐passivating ligand variation, make the CsPbI 3 based perovskite nanocrystal (PNC) the most super‐absorbing and most super‐bright among quantum dot‐PNC family. Radiative rate got enhanced 9 times and non‐radiative rate decreased 13 times. Moreover, very high (detrapping rate/trapping rate) of electron and 90% peak of ON fraction make this PNC a nearly‐non‐blinking one. Ultrafast and comparatively shorter hot exciton/electron cooling time (536 fs) and hot exciton/electron trapping time (516 fs) can explain why this PNC exhibits hitherto unobserved excellent optical properties.
Authors
- Manobina Karmakar (ORCID: https://orcid.org/0000-0002-9665-3203)
- Chayan K. De (ORCID: https://orcid.org/0000-0003-4370-9004)
- Ayon Jyoti Karmakar (ORCID: https://orcid.org/0000-0002-8409-503X)
- S. Ghosh (ORCID: https://orcid.org/0000-0003-1029-165X)
- Saptarshi Mandal (ORCID: https://orcid.org/0000-0003-2837-9895)
- Rahul Debnath (ORCID: https://orcid.org/0000-0002-1338-204X)
- Prasun K. Mandal (ORCID: https://orcid.org/0000-0002-5543-5090)
- Mainak Ghosal
- Soumen Mukherjee (ORCID: https://orcid.org/0000-0002-6428-7878)
- Sourav Dey (ORCID: https://orcid.org/0000-0002-5537-1699)
- Prasanta Datta
Institutions
- Indian Institute of Science Education and Research Kolkata (IN)
- Indian Institute of Technology Kharagpur (IN)
Publication Details
- Journal
- Advanced Optical Materials
- Published
- 2024-10-24
- DOI
- https://doi.org/10.1002/adom.202402608
- Citations
- 8
- Primary Topic
- Perovskite Materials and Applications
- Type
- article
- Field-Weighted Citation Impact
- 1.67
Funders
- Indian Institute of Science Education and Research Kolkata