Developed one-pot synthesis of dual-color CdSe quantum dots for white light-emitting diode application

Sheng Dai, Cyuan Bin Siao, Shu Ru Chung, Kuan Wen Wang, Xiaoqing Pan

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Quantum dots (QDs) have attracted tremendous attention due to their outstanding optical properties, which show great potential for next generation lighting and displays. In particular, dual-color QDs (green- and red-emitting) offer significant advantages over the conventional phosphors used in white light-emitting diode (WLED) applications, which are replacing traditional fluorescent lamps due to their improved energy efficiency. However, a facile synthesis of well-controlled dual-color QDs is still one of the major constraints on a wider application of QD-WLEDs. Here, we report a developed one-pot synthesis method to produce dual-color QDs for WLED application. The size and fraction of red and green QDs can be controlled precisely during the synthetic process using HDA and HDA/TOPO as sophisticated capping reagents, respectively, thus manifesting decent optical properties and remarkably enhanced stability. One of our samples, GR0.75 QDs, is demonstrated to produce pure white color in a fabricated WLED device up to 18 hours. Based on advanced characterization, our findings reveal the critical role of the specific capping reagent in the synthesis and structure control of dual-color QDs, while the results regarding the enhanced stability may broaden the avenues for future QD-WLED applications.

Original languageEnglish
Pages (from-to)3089-3096
Number of pages8
JournalJournal of Materials Chemistry C
Volume6
Issue number12
DOIs
StatePublished - 2018

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