Modulating emission properties in a host–guest colloidal quantum well superlattice
Self-assembly of colloidal nanocrystals into ordered superlattices is a powerful approach to enable novel collective properties which are not available in individual colloids. However, to date, it remains a major challenge to develop a practical route to modulate such collective properties for poten...
| Main Authors: | , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2022
|
| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/154993 |
| _version_ | 1826113588840890368 |
|---|---|
| author | Yu, Junhong Sharma, Manoj Wang, Yimeng Delikanli, Savas Baruj, Hamed Dehghanpour Sharma, Ashma Demir, Hilmi Volkan Dang, Cuong |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Yu, Junhong Sharma, Manoj Wang, Yimeng Delikanli, Savas Baruj, Hamed Dehghanpour Sharma, Ashma Demir, Hilmi Volkan Dang, Cuong |
| author_sort | Yu, Junhong |
| collection | NTU |
| description | Self-assembly of colloidal nanocrystals into ordered superlattices is a powerful approach to enable novel collective properties which are not available in individual colloids. However, to date, it remains a major challenge to develop a practical route to modulate such collective properties for potential photonic applications. Herein, it is shown that the collective emission properties in colloidal quantum well (CQW) superlattices, including emission color and anisotropy, can be effectively modulated in a binary host–guest architecture. The experimental and theoretical results reveal that excitons of the host (i.e., the undoped CQWs) generated by photoexcitation can be controllably harvested by the guest (i.e., the Cu-doped CQWs) for light emission, owing to an exciton hopping assisted exciton trapping process. Such a nano-building block with tunable collective optical properties may enlighten novel colloidal material-based photonic applications, including optical anti-counterfeiting, next-generation liquid crystal displays, and multifunctional biological markers. |
| first_indexed | 2024-10-01T03:25:41Z |
| format | Journal Article |
| id | ntu-10356/154993 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:25:41Z |
| publishDate | 2022 |
| record_format | dspace |
| spelling | ntu-10356/1549932023-02-28T19:35:29Z Modulating emission properties in a host–guest colloidal quantum well superlattice Yu, Junhong Sharma, Manoj Wang, Yimeng Delikanli, Savas Baruj, Hamed Dehghanpour Sharma, Ashma Demir, Hilmi Volkan Dang, Cuong School of Electrical and Electronic Engineering School of Physical and Mathematical Sciences LUMINOUS! Centre of Excellence for Semiconductor Lighting & Displays The Photonics Institute CNRS International NTU THALES Research Alliances Science::Physics Engineering::Electrical and electronic engineering Colloidal Quantum Wells Colloidal Superlattices Self-assembly of colloidal nanocrystals into ordered superlattices is a powerful approach to enable novel collective properties which are not available in individual colloids. However, to date, it remains a major challenge to develop a practical route to modulate such collective properties for potential photonic applications. Herein, it is shown that the collective emission properties in colloidal quantum well (CQW) superlattices, including emission color and anisotropy, can be effectively modulated in a binary host–guest architecture. The experimental and theoretical results reveal that excitons of the host (i.e., the undoped CQWs) generated by photoexcitation can be controllably harvested by the guest (i.e., the Cu-doped CQWs) for light emission, owing to an exciton hopping assisted exciton trapping process. Such a nano-building block with tunable collective optical properties may enlighten novel colloidal material-based photonic applications, including optical anti-counterfeiting, next-generation liquid crystal displays, and multifunctional biological markers. Ministry of Education (MOE) National Research Foundation (NRF) Accepted version The authors would like to acknowledge the financial support from Singapore National Research Foundation under the program of NRF-NRFI2016-08, the Competitive Research Program NRF-CRP14-2014-03, and the Singapore Ministry of Education AcRF Tier-1 grant (MOE2019-T1-002-087). H.V.D. is also grateful to acknowledge additional financial support from the TUBA. 2022-01-26T08:04:45Z 2022-01-26T08:04:45Z 2021 Journal Article Yu, J., Sharma, M., Wang, Y., Delikanli, S., Baruj, H. D., Sharma, A., Demir, H. V. & Dang, C. (2021). Modulating emission properties in a host–guest colloidal quantum well superlattice. Advanced Optical Materials, 2101756-. https://dx.doi.org/10.1002/adom.202101756 2195-1071 https://hdl.handle.net/10356/154993 10.1002/adom.202101756 2-s2.0-85121464708 2101756 en NRF-NRFI2016-08 NRF-CRP14-2014-03 MOE2019-T1-002-087 Advanced Optical Materials This is the peer reviewed version of the following article: Yu, J., Sharma, M., Wang, Y., Delikanli, S., Baruj, H. D., Sharma, A., Demir, H. V. & Dang, C. (2021). Modulating emission properties in a host–guest colloidal quantum well superlattice. Advanced Optical Materials, 2101756-, which has been published in final form at https://doi.org/10.1002/adom.202101756. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf |
| spellingShingle | Science::Physics Engineering::Electrical and electronic engineering Colloidal Quantum Wells Colloidal Superlattices Yu, Junhong Sharma, Manoj Wang, Yimeng Delikanli, Savas Baruj, Hamed Dehghanpour Sharma, Ashma Demir, Hilmi Volkan Dang, Cuong Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title | Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title_full | Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title_fullStr | Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title_full_unstemmed | Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title_short | Modulating emission properties in a host–guest colloidal quantum well superlattice |
| title_sort | modulating emission properties in a host guest colloidal quantum well superlattice |
| topic | Science::Physics Engineering::Electrical and electronic engineering Colloidal Quantum Wells Colloidal Superlattices |
| url | https://hdl.handle.net/10356/154993 |
| work_keys_str_mv | AT yujunhong modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT sharmamanoj modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT wangyimeng modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT delikanlisavas modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT barujhameddehghanpour modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT sharmaashma modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT demirhilmivolkan modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice AT dangcuong modulatingemissionpropertiesinahostguestcolloidalquantumwellsuperlattice |