Tip-Induced Strain Engineering of a Single Metal Halide Perovskite Quantum Dot
SCIE
SCOPUS
- Title
- Tip-Induced Strain Engineering of a Single Metal Halide Perovskite Quantum Dot
- Authors
- Lee, Hyeongwoo; Woo, Ju Young; Park, Dae Young; Jo, Inho; Park, Jusun; Lee, Yeunhee; Koo, Yeonjeong; Choi, Jinseong; Kim, Hyojung; Kim, Yong-Hyun; Jeong, Mun Seok; Jeong, Sohee; Park, Kyoung-Duck
- Date Issued
- 2021-05
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Strain engineering of perovskite quantum dots (pQDs) enables widely tunable photonic device applications. However, manipulation at the single-emitter level has never been attempted. Here, we present a tip-induced control approach combined with tip-enhanced photoluminescence (TEPL) spectroscopy to engineer strain, bandgap, and the emission quantum yield of a single pQD. Single CsPbBrxI3-x pQDs are clearly resolved through hyperspectral TEPL imaging with , similar to 10 nm spatial resolution. The plasmonic tip then directly applies pressure to a single pQD to facilitate a bandgap shift up to similar to 62 meV with Purcell-enhanced PL increase as high as similar to 10(5) for the strain-induced pQD. Furthermore, by systematically modulating the tip-induced compressive strain of a single pQD, we achieve dynamical bandgap engineering in a reversible manner. In addition, we facilitate the quantum dot coupling for a pQD ensemble with similar to 0.8 GPa tip pressure at the nanoscale estimated theoretically. Our approach presents a strategy to tune the nano-opto-electro-mechanical properties of pQDs at the single-crystal level.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/110824
- DOI
- 10.1021/acsnano.1c02182
- ISSN
- 1936-0851
- Article Type
- Article
- Citation
- ACS NANO, vol. 15, no. 5, page. 9057 - 9064, 2021-05
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