Blue-green color tunable solution processable organolead chloride-bromide mixed halide perovskites for optoelectronic applications

Aditya Sadhanala, Shahab Ahmad, Baodan Zhao, Nadja Giesbrecht, Phoebe M. Pearce, Felix Deschler, Robert L.Z. Hoye, Karl C. Gödel, Thomas Bein, Pablo Docampo, Siân E. Dutton, Michael F.L. De Volder, Richard H. Friend

Research output: Contribution to journalArticleResearchpeer-review

287 Citations (Scopus)

Abstract

Solution-processed organo-lead halide perovskites are produced with sharp, color-pure electroluminescence that can be tuned from blue to green region of visible spectrum (425-570 nm). This was accomplished by controlling the halide composition of CH3NH3Pb(BrxCl1-x)3 [0 ≥ x ≥ 1] perovskites. The bandgap and lattice parameters change monotonically with composition. The films possess remarkably sharp band edges and a clean bandgap, with a single optically active phase. These chloride-bromide perovskites can potentially be used in optoelectronic devices like solar cells and light emitting diodes (LEDs). Here we demonstrate high color-purity, tunable LEDs with narrow emission full width at half maxima (FWHM) and low turn on voltages using thin-films of these perovskite materials, including a blue CH3NH3PbCl3 perovskite LED with a narrow emission FWHM of 5 nm.

Original languageEnglish
Pages (from-to)6095-6101
Number of pages7
JournalNano Letters
Volume15
Issue number9
DOIs
Publication statusPublished - 3 Aug 2015
Externally publishedYes

Keywords

  • bandgap tuning
  • Blue perovskite LED
  • chloride bromide perovskite
  • disorder
  • narrow FWHM

Cite this