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Toward Engineering Intrinsic Line Widths and Line Broadening in Perovskite Nanoplatelets.
Liu, Albert; Nagamine, Gabriel; Bonato, Luiz G; Almeida, Diogo B; Zagonel, Luiz F; Nogueira, Ana F; Padilha, Lazaro A; Cundiff, Steven T.
Afiliação
  • Liu A; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States.
  • Nagamine G; Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Bonato LG; Instituto de Quimica, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Almeida DB; Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Zagonel LF; Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Nogueira AF; Instituto de Quimica, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Padilha LA; Instituto de Fisica Gleb Wataghin, Universidade Estadual de Campinas, Campinas, Sao Paulo 13083-970, Brazil.
  • Cundiff ST; Department of Physics, University of Michigan, Ann Arbor, Michigan 48109, United States.
ACS Nano ; 15(4): 6499-6506, 2021 Apr 27.
Article em En | MEDLINE | ID: mdl-33769788
Perovskite nanoplatelets possess extremely narrow absorption and emission line widths, which are crucial characteristics for many optical applications. However, their underlying intrinsic and extrinsic line-broadening mechanisms are poorly understood. Here, we apply multidimensional coherent spectroscopy to determine the homogeneous line broadening of colloidal perovskite nanoplatelet ensembles. We demonstrate a dependence of not only their intrinsic line widths but also of various broadening mechanisms on platelet geometry. We find that decreasing nanoplatelet thickness by a single monolayer results in a 2-fold reduction of the inhomogeneous line width and a 3-fold reduction of the intrinsic homogeneous line width to the sub-millielectronvolts regime. In addition, our measurements suggest homogeneously broadened exciton resonances in two-layer (but not necessarily three-layer) nanoplatelets at room-temperature.
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Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Idioma: En Ano de publicação: 2021 Tipo de documento: Article