Optical signatures of lattice strain in chemically doped colloidal quantum wells
Abstract Lattice strain plays a vital role in tailoring the optoelectronic performance of colloidal nanocrystals (NCs) with exotic geometries. Although optical identifications of lattice strain in irregular-shaped NCs or hetero-structured NCs have been well documented, less is known about optical si...
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Nature Portfolio
2025-01-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-55984-x |
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| author | Junhong Yu Hilmi Volkan Demir Manoj Sharma |
| author_facet | Junhong Yu Hilmi Volkan Demir Manoj Sharma |
| author_sort | Junhong Yu |
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| description | Abstract Lattice strain plays a vital role in tailoring the optoelectronic performance of colloidal nanocrystals (NCs) with exotic geometries. Although optical identifications of lattice strain in irregular-shaped NCs or hetero-structured NCs have been well documented, less is known about optical signatures of the sparsely distributed lattice mismatch in chemically-doped NCs. Here, we show that coherent acoustic phonons (CAPs) following bandgap optical excitations in Cu-doped CdSe colloidal quantum wells (CQWs) offer a unique platform for indirectly measuring the dopant-induced lattice strain. By comparing the behavior of CAPs in Cu-doped and undoped CQWs (i.e., vibrational phase/lifetime/amplitude), we have revealed the driving force of CAPs related to the optical screening of lattice strain-induced piezoelectric fields, which thus allows to determine the strain-induced piezoelectric field of ~102 V/m in Cu-doped CdSe CQWs. This work may facilitate a detailed understanding of lattice strain in chemically-doped colloidal NCs, which is a prerequisite for the design of favorable doped colloids in optoelectronics. |
| format | Article |
| id | doaj-art-8433e98956974de6861466363ea5a9df |
| institution | Kabale University |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
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| series | Nature Communications |
| spelling | doaj-art-8433e98956974de6861466363ea5a9df2025-01-19T12:29:58ZengNature PortfolioNature Communications2041-17232025-01-011611910.1038/s41467-025-55984-xOptical signatures of lattice strain in chemically doped colloidal quantum wellsJunhong Yu0Hilmi Volkan Demir1Manoj Sharma2College of Physics and Electronic Engineering, Chongqing Normal UniversityLUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological UniversityLUMINOUS! Centre of Excellence for Semiconductor Lighting and Displays, School of Electrical and Electronic Engineering, Nanyang Technological UniversityAbstract Lattice strain plays a vital role in tailoring the optoelectronic performance of colloidal nanocrystals (NCs) with exotic geometries. Although optical identifications of lattice strain in irregular-shaped NCs or hetero-structured NCs have been well documented, less is known about optical signatures of the sparsely distributed lattice mismatch in chemically-doped NCs. Here, we show that coherent acoustic phonons (CAPs) following bandgap optical excitations in Cu-doped CdSe colloidal quantum wells (CQWs) offer a unique platform for indirectly measuring the dopant-induced lattice strain. By comparing the behavior of CAPs in Cu-doped and undoped CQWs (i.e., vibrational phase/lifetime/amplitude), we have revealed the driving force of CAPs related to the optical screening of lattice strain-induced piezoelectric fields, which thus allows to determine the strain-induced piezoelectric field of ~102 V/m in Cu-doped CdSe CQWs. This work may facilitate a detailed understanding of lattice strain in chemically-doped colloidal NCs, which is a prerequisite for the design of favorable doped colloids in optoelectronics.https://doi.org/10.1038/s41467-025-55984-x |
| spellingShingle | Junhong Yu Hilmi Volkan Demir Manoj Sharma Optical signatures of lattice strain in chemically doped colloidal quantum wells Nature Communications |
| title | Optical signatures of lattice strain in chemically doped colloidal quantum wells |
| title_full | Optical signatures of lattice strain in chemically doped colloidal quantum wells |
| title_fullStr | Optical signatures of lattice strain in chemically doped colloidal quantum wells |
| title_full_unstemmed | Optical signatures of lattice strain in chemically doped colloidal quantum wells |
| title_short | Optical signatures of lattice strain in chemically doped colloidal quantum wells |
| title_sort | optical signatures of lattice strain in chemically doped colloidal quantum wells |
| url | https://doi.org/10.1038/s41467-025-55984-x |
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