Perovskite Quantum Dots with Near Unity Solution and Neat-Film Photoluminescent Quantum Yield by Novel Spray Synthesis

Shu Wen Dai, Bo Wei Hsu, Chien Yu Chen, Chia An Lee, Hsiao Yun Liu, Hsiao Fang Wang, Yu Ching Huang, Tien Lin Wu, Arumugam Manikandan, Rong Ming Ho, Cheng Si Tsao, Chien Hong Cheng, Yu Lun Chueh, Hao Wu Lin

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

In this study, a novel perovskite quantum dot (QD) spray-synthesis method is developed by combining traditional perovskite QD synthesis with the technique of spray pyrolysis. By utilizing this new technique, the synthesis of cubic-shaped perovskite QDs with a homogeneous size of 14 nm is demonstrated, which shows an unprecedented stable absolute photoluminescence quantum yield ≈100% in the solution and even in the solid-state neat film. The highly emissive thin films are integrated with light emission devices (LEDs) and organic light emission displays (OLEDs). The color conversion type QD-LED (ccQD-LED) hybrid devices exhibit an extremely saturated green emission, excellent external quantum efficiency of 28.1%, power efficiency of 121 lm W−1, and extraordinary forward-direction luminescence of 8 500 000 cd m−2. The conceptual ccQD-OLED hybrid display also successfully demonstrates high-definition still images and moving pictures with a 119% National Television System Committee 1931 color gamut and 123% Digital Cinema Initiatives-P3 color gamut. These very-stable, ultra-bright perovskite QDs have the properties necessary for a variety of useful applications in optoelectronics.

Original languageEnglish
Article number1705532
JournalAdvanced Materials
Volume30
Issue number7
DOIs
Publication statusPublished - 2018 Feb 15
Externally publishedYes

Keywords

  • hybrid devices
  • perovskite quantum dots
  • quantum yields
  • spray synthesis

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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