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Surface-Originated Weak Confinement in Tetrahedral Indium Arsenide Quantum Dots.
Kim, Meeree; Lee, Junho; Jung, Jaegwan; Shin, Daekwon; Kim, Jugyoung; Cho, Eunhye; Xing, Yaolong; Jeong, Hyeonjun; Park, Seongmin; Oh, Sang Ho; Kim, Yong-Hyun; Jeong, Sohee.
Afiliación
  • Kim M; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Lee J; Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
  • Jung J; Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
  • Shin D; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Kim J; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Cho E; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Xing Y; Department of Energy Engineering, KENTECH Institute for Energy Materials and Devices, Korea Institute of Energy Technology (KENTECH), Naju-si 58330, Jeonnam, Republic of Korea.
  • Jeong H; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Park S; Department of Energy Science (DOES) and Center for Artificial Atoms, Sungkyunkwan University (SKKU), Suwon 16419, Gyeonggi-do, Republic of Korea.
  • Oh SH; Department of Energy Engineering, KENTECH Institute for Energy Materials and Devices, Korea Institute of Energy Technology (KENTECH), Naju-si 58330, Jeonnam, Republic of Korea.
  • Kim YH; Department of Physics, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
  • Jeong S; School of Physics, Institute of Science, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand.
J Am Chem Soc ; 146(15): 10251-10256, 2024 Apr 17.
Article en En | MEDLINE | ID: mdl-38587307
ABSTRACT
While the shape-dependent quantum confinement (QC) effect in anisotropic semiconductor nanocrystals has been extensively studied, the QC in facet-specified polyhedral quantum dots (QDs) remains underexplored. Recently, tetrahedral nanocrystals have gained prominence in III-V nanocrystal synthesis. In our study, we successfully synthesized well-faceted tetrahedral InAs QDs with a first excitonic absorption extending up to 1700 nm. We observed an unconventional sizing curve, indicating weaker confinement than for equivalently volumed spherical QDs. The (111) surface states of InAs QDs persist at the conduction band minimum state even after ligand passivation with a significantly reduced band gap, which places tetrahedral QDs at lower energies in the sizing curve. Consequently, films composed of tetrahedral QDs demonstrate an extended photoresponse into the short-wave infrared region, compared to isovolume spherical QD films.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Am Chem Soc Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos