Facile synthesis of thermally stable CsPbBr3 perovskite quantum dot-inorganic SiO2 composites and their application to white light-emitting diodes with wide color gamut

Title
Facile synthesis of thermally stable CsPbBr3 perovskite quantum dot-inorganic SiO2 composites and their application to white light-emitting diodes with wide color gamut
Authors
한준수장호성박다혜김웅
Keywords
quantum dots; perovskite; SiO2 composites; white LEDs; wide color gamut
Issue Date
2018-02
Publisher
Dyes and pigments
Citation
VOL 149-252
Abstract
In this study, highly efficient green-to-red-emitting CsPbBr3-zIz perovskite quantum dots (PQDs) with high color purity are synthesized and a facile route for the formation of PQD-inorganic SiO2 composites is proposed. To improve thermal and water stability of the PQDs, perhydropolysilazane (PHPS)-derived SiO2 composites are prepared. The CsPbBr3-SiO2 composites exhibit highly enhanced thermal stability and water stability. The green-emitting CsPbBr3-SiO2 composites and red-emitting CsPbBr1·2I1.8 PQDs are coated on blue light-emitting diodes (LEDs) and the fabricated green and red LEDs show high color purities of 95.1 and 99.5%, respectively. Finally, the white LED is fabricated by combining a blue LED with CsPbBr3-SiO2 composites and CsPbBr1·2I1.8 PQDs. The fabricated white LED shows bright natural white light (luminous efficacy = 35.4 lmW− 1, correlated color temperature = 5623 K) with excellent color reproducibility due to wide color gamut (127% National Television System Committee color space).
URI
http://pubs.kist.re.kr/handle/201004/66590
ISSN
0143-7208
Appears in Collections:
KIST Publication > Article
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