Combination of carbon dot and polymer dot phosphors for white light-emitting diodes. Issue 28 (29th June 2015)

• Record Type: Journal Article
• Authors: Sun, Chun; Zhang, Yu; Sun, Kai; Reckmeier, Claas; Zhang, Tieqiang; Zhang, XiaoYu; Zhao, Jun; Wu, Changfeng; Yu, William W.; Rogach, Andrey L.
• Is Part Of: Nanoscale. Volume 7:Issue 28(2015)
• Page Start: 12045
• Page End: 12050
• Publication Date: 2015-06-29
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr03014e
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : The white light-emitting diodes with high color rendering index (85–96) and widely variable color temperatures(2805–7786 K) were fabricated from carbon-based nanomaterials with weak reabsorption and no energy transfer crosstalk and showed excellent color stability. Abstract : We realized white light-emitting diodes with high color rendering index (85–96) and widely variable color temperatures (2805–7786 K) by combining three phosphors based on carbon dots and polymer dots, whose solid-state photoluminescence self-quenching was efficiently suppressed within a polyvinyl pyrrolidone matrix. All three phosphors exhibited dominant absorption in the UV spectral region, which ensured the weak reabsorption and no energy transfer crosstalk. The WLEDs showed excellent color stability against the increasing current because of the similar response of the tricolor phosphors to the UV light variation.