Grain Size Modulation and Interfacial Engineering of CH3NH3PbBr3 Emitter Films through Incorporation of Tetraethylammonium Bromide

Nur Fadilah Jamaludin, Natalia Yantara, Yan Fong Ng, Mingjie Li, Teck Wee Goh, Krishnamoorthy Thirumal, Tze Chien Sum, Nripan Mathews, Cesare Soci, Subodh Mhaisalkar

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)


Metal halide perovskites have demonstrated breakthrough performances as absorber and emitter materials for photovoltaic and display applications respectively. However, despite the low manufacturing cost associated with solution-based processing, the propensity for defect formation with this technique has led to an increasing need for defect passivation. Here, we present an inexpensive and facile method to remedy surface defects through a postdeposition treatment process using branched alkylammonium cation species. The simultaneous realignment of interfacial energy levels upon incorporation of tetraethylammonium bromide onto the surface of CH3NH3PbBr3 films contributes favorably toward the enhancement in overall light-emitting diode characteristics, achieving maximum luminance, current efficiency, and external quantum efficiency values of 11 000 cd m−2, 0.68 cd A−1, and 0.16 %, respectively.

Original languageEnglish
Pages (from-to)1075-1080
Number of pages6
Issue number9
Publication statusPublished - 7 May 2018
Externally publishedYes


  • CHNHPbBr
  • hybrid halide perovskites
  • light-emitting diodes
  • mixed dimensional systems
  • postdeposition treatment

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

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