Micrometer-resolution fluorescence and lifetime mappings of CsPbBr$_3$ nanocrystal films coupled with a TiO$_2$ grating
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2024
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866929597809950720 |
|---|---|
| author | Nguyen, Viet Anh Nguyen, Linh Thi Dieu Do, Thi Thu Ha Wu, Ye Sergeev, Aleksandr A. Zhu, Ding Valuckas, Vytautas Pham, Duong Bui, Hai Xuan Son Hoang, Duy Mai Bui, Son Tung Bui, Xuan Khuyen Nguyen, Binh Thanh Nguyen, Hai Son Vu, Lam Dinh Rogach, Andrey Ha, Son Tung Le-Van, Quynh |
| author_facet | Nguyen, Viet Anh Nguyen, Linh Thi Dieu Do, Thi Thu Ha Wu, Ye Sergeev, Aleksandr A. Zhu, Ding Valuckas, Vytautas Pham, Duong Bui, Hai Xuan Son Hoang, Duy Mai Bui, Son Tung Bui, Xuan Khuyen Nguyen, Binh Thanh Nguyen, Hai Son Vu, Lam Dinh Rogach, Andrey Ha, Son Tung Le-Van, Quynh |
| contents | Enhancing light emission from perovskite nanocrystal (NC) films is essential in light-emitting devices, as their conventional stacks often restrict the escape of emitted light. This work addresses this challenge by employing a TiO$_2$ grating to enhance light extraction and shape the emission of CsPbBr$_3$ nanocrystal films. Angle-resolved photoluminescence (PL) demonstrated a tenfold increase in emission intensity by coupling the Bloch resonances of the grating with the spontaneous emission of the perovskite NCs. Fluorescence lifetime imaging microscopy (FLIM) provided micrometer-resolution mapping of both PL intensity and lifetime across a large area, revealing a decrease in PL lifetime from 8.2 ns for NC films on glass to 6.1 ns on the TiO$_2$ grating. Back focal plane (BFP) spectroscopy confirmed how the Bloch resonances transformed the unpolarized, spatially incoherent emission of NCs into polarized and directed light. These findings provide further insights into the interactions between dielectric nanostructures and perovskite NC films, offering possible pathways for designing better performing perovskite optoelectronic devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_12463 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Micrometer-resolution fluorescence and lifetime mappings of CsPbBr$_3$ nanocrystal films coupled with a TiO$_2$ grating Nguyen, Viet Anh Nguyen, Linh Thi Dieu Do, Thi Thu Ha Wu, Ye Sergeev, Aleksandr A. Zhu, Ding Valuckas, Vytautas Pham, Duong Bui, Hai Xuan Son Hoang, Duy Mai Bui, Son Tung Bui, Xuan Khuyen Nguyen, Binh Thanh Nguyen, Hai Son Vu, Lam Dinh Rogach, Andrey Ha, Son Tung Le-Van, Quynh Optics Applied Physics Enhancing light emission from perovskite nanocrystal (NC) films is essential in light-emitting devices, as their conventional stacks often restrict the escape of emitted light. This work addresses this challenge by employing a TiO$_2$ grating to enhance light extraction and shape the emission of CsPbBr$_3$ nanocrystal films. Angle-resolved photoluminescence (PL) demonstrated a tenfold increase in emission intensity by coupling the Bloch resonances of the grating with the spontaneous emission of the perovskite NCs. Fluorescence lifetime imaging microscopy (FLIM) provided micrometer-resolution mapping of both PL intensity and lifetime across a large area, revealing a decrease in PL lifetime from 8.2 ns for NC films on glass to 6.1 ns on the TiO$_2$ grating. Back focal plane (BFP) spectroscopy confirmed how the Bloch resonances transformed the unpolarized, spatially incoherent emission of NCs into polarized and directed light. These findings provide further insights into the interactions between dielectric nanostructures and perovskite NC films, offering possible pathways for designing better performing perovskite optoelectronic devices. |
| title | Micrometer-resolution fluorescence and lifetime mappings of CsPbBr$_3$ nanocrystal films coupled with a TiO$_2$ grating |
| topic | Optics Applied Physics |
| url | https://arxiv.org/abs/2411.12463 |