Synthesis of All-Inorganic Cd-Doped CsPbCl3 Perovskite Nanocrystals with Dual-Wavelength Emission

Tong Cai, Hanjun Yang, Katie Hills-Kimball, Jeong Pil Song, Hua Zhu, Elan Hofman, Weiwei Zheng, Brenda M. Rubenstein, Ou Chen

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Doped lead halide perovskite nanocrystals (NCs) have garnered significant attention due to their superior optoelectronic properties. Here, we report a synthesis of Cd-doped CsPbCl3 NCs by decoupling Pb- and Cl-precursors in a hot injection method. The resulting Cd-doped perovskite NCs manifest a dual-wavelength emission profile with the first reported example of Cd-dopant emission. By controlling Cd-dopant concentration, the emission profile can be tuned with a dopant emission quantum yield of up to 8%. A new secondary emission (∼610 nm) is induced by an energy transfer process from photoexcited hosts to Cd-dopants and a subsequent electronic transition from the excited state (3Eg) to the ground state (1A1g) of [CdCl6]4- units. This electronic transition matches well with a first-principles density functional theory calculation. Further, the optical behavior of Cd-doped CsPbCl3 NCs can be altered through postsynthetic anion-exchange reactions. Our studies present a new model system for doping chemistry studies in semiconductors for various optoelectronic applications.

Original languageEnglish (US)
Pages (from-to)7079-7084
Number of pages6
JournalJournal of Physical Chemistry Letters
Volume9
Issue number24
DOIs
StatePublished - Dec 20 2018

ASJC Scopus subject areas

  • Materials Science(all)
  • Physical and Theoretical Chemistry

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    Cai, T., Yang, H., Hills-Kimball, K., Song, J. P., Zhu, H., Hofman, E., Zheng, W., Rubenstein, B. M., & Chen, O. (2018). Synthesis of All-Inorganic Cd-Doped CsPbCl3 Perovskite Nanocrystals with Dual-Wavelength Emission. Journal of Physical Chemistry Letters, 9(24), 7079-7084. https://doi.org/10.1021/acs.jpclett.8b03412