Polyhedral Oligomeric Silsesquioxane Enhances the Brightness of Perovskite Nanocrystal-Based Green Light-Emitting Devices

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review

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Author(s)

  • Hong Lin
  • Stephen V. Kershaw
  • Andrei S. Susha
  • Wallace C. H. Choy

Related Research Unit(s)

Detail(s)

Original languageEnglish
Pages (from-to)4398-4404
Journal / PublicationJournal of Physical Chemistry Letters
Volume7
Issue number21
Publication statusPublished - 24 Oct 2016

Abstract

The beneficial role of the insulating material polyhedral oligomeric silsesquioxane (POSS) as a solution additive or an additional hole-blocking layer to enhance the performance of electroluminescent green light-emitting devices (LEDs) based on CsPbBr3 perovskite nanocrystals is demonstrated. POSS improves the surface coverage and the morphological features of the films deposited either from supernatant or suspension of perovskite nanocrystals. The external quantum efficiency and the luminance efficiency of LEDs with an additional POSS layer reach 0.35% and 1.20 cd/A, respectively, constituting a more than 17-fold enhancement to the reference devices without POSS; the LED peak luminance reaches 2983 cd/m2, and the device stability is improved. The POSS acts as a hole-blocking layer between the perovskite nanocrystals and TPBi, keeping both electrons and holes located within the active layer for an efficient recombination.

Citation Format(s)

Polyhedral Oligomeric Silsesquioxane Enhances the Brightness of Perovskite Nanocrystal-Based Green Light-Emitting Devices. / Huang, He; Lin, Hong; Kershaw, Stephen V.; Susha, Andrei S.; Choy, Wallace C. H.; Rogach, Andrey L.

In: Journal of Physical Chemistry Letters, Vol. 7, No. 21, 24.10.2016, p. 4398-4404.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalNot applicablepeer-review