Tuning the Color Temperature of White-Light-Emitting Electrochemical Cells by Laser-Scanning Perovskite-Nanocrystal Color Conversion Layers

Wen Kuang Wu, Cheng Ming Wang, Ming-Che Chan, Jiun Yi Lien, Yong Ming Su, Monima Sarma, Zu-Po Yang*, Hai-Ching Su, Ken Tsung Wong, Sue Lein Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

The development of white-light-emitting electrochemical cells (LECs) has attracted great attention owing to their numerous advantages. Recently, perovskite materials have also shown many outstanding optoelectronic properties in light absorption and emission, and hence they are suitable for serving as the color conversion layers (CCLs) in solid-state white-light-emitting diodes (LEDs). Here, white LECs were fabricated by integrating non-doped blue-green LECs with CCLs made of a single composition of perovskite nanocrystal (NCs). Moreover, the correlated color temperatures (CCTs) of the white LECs can be tuned by modifying the optical properties of the perovskite NCs, in the same way as so as the color conversion properties of CCLs are tuned, through laser scan. By controlling the laser power, scanning number, and duty cycle of the scanned grating patterns on perovskite-NC CCLs, the CCTs of the white LECs can be tuned from 2502 K to nearly 4300 K. Since this method is much different from that used with conventional CCLs, which use multiple compositions of perovskite NCs to produce white light, the inherent anion-exchange issue of perovskite NCs can be avoided.

Original languageEnglish
Pages (from-to)239-245
Number of pages7
JournalChemPlusChem
Volume83
Issue number4
DOIs
StatePublished - 1 Apr 2018

Keywords

  • color temperature
  • light-emitting electrochemical cells
  • nanocrystals
  • perovskites

Fingerprint Dive into the research topics of 'Tuning the Color Temperature of White-Light-Emitting Electrochemical Cells by Laser-Scanning Perovskite-Nanocrystal Color Conversion Layers'. Together they form a unique fingerprint.

Cite this