Full Visible Range Covering InP/ZnS Nanocrystals with High Photometric Performance and Their Application to White Quantum Dot Light‐Emitting Diodes

Abstract

High‐quality InP/ZnS core–shell nanocrystals with luminescence tunable over the entire visible spectrum have been achieved by a facile one‐pot solvothermal method. These nanocrystals exhibit high quantum yields (above 60%), wide emission spectrum tunability and excellent photostability. The FWHM can be as narrow as 38 nm, which is close to that of CdSe nanocrystals. Also, making use of these nanocrystals, we further demonstrated a cadmium‐free white QD‐LED with a high color rendering index of 91. The high‐performance of the resulting InP/ZnS NCs coupled with their low intrinsic toxicity may further promote industrial applications of these NC emitters.

Tuning the Lattice Parameter of InxZnyP for Highly Luminescent Lattice-Matched Core/Shell Quantum Dots

“…InP-based QDs are among the most investigated nontoxic Cd-free systems, owing to their comparable emission range. [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25] However, in terms of PL QY and PL stability they cannot yet compete with Cd-based QDs.…”

Near resonant and nonresonant third-order optical nonlinearities of colloidal InP/ZnS quantum dots

“…9,13 Recently, by employing noncoordinating solvent and capping InP with ZnS shell of optimized thickness, high-quality InP/ZnS core-shell QDs were synthesized with a narrow size distribution and high emission quantum yield (QY) comparable to CdSe QDs. 14 In this letter, we present our investigation of the optical nonlinearity on these QDs, and it is shown that the colloidal InP/ZnS QDs exhibit strong SA in near resonant regime and significant TPA in nonresonant regime indicating they are of great interest as nonlinear optical materials.…”

Large-Scale Synthesis of Highly Luminescent InP@ZnS Quantum Dots Using Elemental Phosphorus Precursor

“…[28][29][30][31][32][33][34] In particular, their light-emitting characteristics in a wide range of wavelengths, i.e., from ultraviolet to near-infrared, makes them a new class of emitters for various technological applications such as lightemitting diodes, lasers, and biomedical imaging. [35][36][37][38][39][40][41] As of today, various semiconductors (including the II−VI [42][43][44][45] and III−V [46][47][48] families) have been suggested for such uses, and InP QDs can be recognized as important candidates for cd-free environmentally benign emitters, operating across the entire visible range. However, despite the recent efforts to synthesize high-quality InP QDs, reliable protocols are still required for realizing their reproducible size control, narrow size distribution, and large-scale production.…”