download0 view19
twitter facebook

공공누리This item is licensed Korea Open Government License

Title
Role of quantum confinement in 10nm-scale perovskite optoelectronics
Author(s)
류훈홍기하김한슬홍석민
Publisher
ACS Publications
Publication Year
2019-05-08
Abstract
Quantum confinement-driven band structure engineering of metal halide perovskites (MHPs) is examined for realistically sized structures that consist of up to 105 atoms. The structural and compositional effects on band gap energies are simulated for crystalline CH3NH3PbX3 (X = I/Br/Cl) with a tight-binding approach that has been well-established for electronic structure calculations of multimillion atomic systems. Solid maps of band gap energies achievable with quantum dots, nanowires, and nanoplatelets concerning sizes, shapes, and halide compositions are presented, which should be informative to experimentalists for band gap designs. The pathway to suppress band gap instability that appeared in mixed halide perovskites is proposed, revealing that the red shift induced by halide phase separation can be hugely diminished by reducing sizes and adopting halides of lower electronegativity. Our modeling results on finite MHP structures of over 10 nm dimensions show a blueprint for designs of stable light-emitting sources with precisely controlled wavelengths.[FIG OMISSION]
Journal Title
Journal of Physical Chemistry Letters;
Citation Volume
10
ISSN
1948-7185
DOI
10.1021/acs.jpclett.9b00645
Files in This Item:
There are no files associated with this item.
Appears in Collections:
7. KISTI 연구성과 > 학술지 발표논문
URI
https://repository.kisti.re.kr/handle/10580/16064
Fulltext
 https://scienceon.kisti.re.kr/srch/selectPORSrchArticle.do?cn=NART97800622
Export
RIS (EndNote)
XLS (Excel)
XML

Browse