Skip to main navigation Skip to search Skip to main content

Stable Light-Emitting Diodes Using Phase-Pure Ruddlesden–Popper Layered Perovskites

  • Hsinhan Tsai
  • , Wanyi Nie
  • , Jean Christophe Blancon
  • , Constantinos C. Stoumpos
  • , Chan Myae Myae Soe
  • , Jinkyoung Yoo
  • , Jared Crochet
  • , Sergei Tretiak
  • , Jacky Even
  • , Aditya Sadhanala
  • , Giovanni Azzellino
  • , Roberto Brenes
  • , Pulickel M. Ajayan
  • , Vladimir Bulović
  • , Samuel D. Stranks
  • , Richard H. Friend
  • , Mercouri G. Kanatzidis
  • , Aditya D. Mohite
  • Los Alamos National Laboratory
  • Northwestern University
  • Institut FOTON - UMR 6082
  • University of Cambridge
  • Massachusetts Institute of Technology
  • Rice University

Research output: Contribution to journalArticlepeer-review

294 Scopus citations

Abstract

State-of-the-art light-emitting diodes (LEDs) are made from high-purity alloys of III–V semiconductors, but high fabrication cost has limited their widespread use for large area solid-state lighting. Here, efficient and stable LEDs processed from solution with tunable color enabled by using phase-pure 2D Ruddlesden–Popper (RP) halide perovskites with a formula (CH3(CH2)3NH3)2(CH3NH3)n −1PbnI3 n +1 are reported. By using vertically oriented thin films that facilitate efficient charge injection and transport, efficient electroluminescence with a radiance of 35 W Sr−1 cm−2 at 744 nm with an ultralow turn-on voltage of 1 V is obtained. Finally, operational stability tests suggest that phase purity is strongly correlated to stability. Phase-pure 2D perovskites exhibit >14 h of stable operation at peak operating conditions with no droop at current densities of several Amperes cm−2 in comparison to mixtures of 2D/3D or 3D perovskites, which degrade within minutes.

Original languageEnglish
Article number1704217
JournalAdvanced Materials
Volume30
Issue number6
DOIs
StatePublished - Feb 8 2018

Keywords

  • LEDs
  • Ruddlesden–Popper layered perovskites
  • color tunability
  • crystal orientation

Fingerprint

Dive into the research topics of 'Stable Light-Emitting Diodes Using Phase-Pure Ruddlesden–Popper Layered Perovskites'. Together they form a unique fingerprint.

Cite this