Rare earth-free composites of carbon dots/metal–organic frameworks as white light emitting phosphors

Abstract

Here we report a new type of white light-emission material that is free of rare earth metals, fabricated by conveniently compositing carbon dots (CDs) with Zr(iv)-based metal–organic frameworks (MOFs).

Applications of Carbon Dots in Optoelectronics

“…In [ 85 ] it was demonstrated that choosing the adequate ratio between CDs and starch particles effectively prevented self-quenching and resulted in a significant increase of the PL QY compared with bare CDs deposited on a glass. Another materials used as a matrix for CDs are metal–organic framework (MOF): Zr(IV)-based MOF was used to design CD-based composites with white emission and high PL QY reaching 37% [ 96 ].…”

Microwave-assisted in situ large scale synthesis of a carbon dots@g-C3N4 composite phosphor for white light-emitting devices

“…14 Wang et al designed a MOF material from CDs and Zr(IV) with white emission at 365 nm excitation with a PLQY of 37%, and fabricated a WLED with a power efficiency of 1.7 lm W À1 . 15 Shen et al embedded CDs in trisodium citrate crystals to prepare a green emissive phosphor with a PLQY of 21%, and fabricated a WLED with a power efficiency of 6.9 lm W À1 . 16 We combined CDs with starch, polyvinylalcohol, BaSO 4 , NaCl, sodium silicate, silica and branched polyethylenimine to prepare phosphors with PLQYs ranging from 26% to 60%, [17][18][19][20][21][22][23] and WLEDs with power efficiencies in the range of 8-28 lm W À1 .…”

Rare Earth‐Free Luminescent Materials for WLEDs: Recent Progress and Perspectives

“…The report stated that the CIE coordinates were (0.31, 0.34), the CRI was 82, and the LE was 1.7 lm W −1 . [ 152 ] Additionally, Wang et al encapsulated R‐phycoerythrin into HSB‐W1 MOFs. Although the protein was denatured after insertion, it showed dual fluorescence emission at 518 and 600 nm.…”