Dual-Emissive and Color-Tunable Mn-Doped InP/ZnS Quantum Dots via a Growth-Doping Method

Abstract

In this letter, dual-emissive and color-tunable Mn-doped InP/ZnS quantum dots (Mn:InP/ZnS QDs) with the absolute photoluminescence quantum yield (PL QY) up to 78% were successfully synthesized via a growth-doping method. The dual emission of Mn:InP/ZnS QDs is composed of intrinsic emission and Mn-doped emission, which can be tuned by different Mn/In ratios. With the increase of Mn dopant concentration, the intrinsic emission shows a red shift from 485 to 524 nm. The new class of dual-emissive QDs provides potential for future application in white LED.

Single and Dual Doping of Blue‐Emissive ZnSeTe Quantum Dots with Transition Metal Ions

“…[7,8] Cu + and Mn 2+ are the most common transi tion metal ions in doping various QDs with the compositions including (Zn) CdS, [6,[9][10][11][12] ZnSe, [5,7,[13][14][15][16][17][18][19] and InP. [3,8,[20][21][22][23] When properly doped in QD lattice, Cu + and Mn 2+ ions become optically active in different pathways upon the photoexcita tion of host QD. Cu + dopant generates an intragap Cu d energy level, which stays above the valence band (VB) of a host.…”

Spectroscopic investigation of defect-state emission in CdSe quantum dots

“…To prevent self-absorption of QDs in multi-layered QD films, multi-color light emitting QDs with single composition have been proposed [3,[15][16][17][18][19][20][21]. Two general ways to design multi-color light emitting QDs have been proposed; 1) Doping binary or ternary QDs with an extra element [3,[15][16][17][18][19]. 2) Creating surface defects [20,21].…”

Chemical synthesis and optical, structural, and surface characterization of InP-In2O3 quantum dots

“…Moreover, these luminophores are more photostable than organic molecular compounds [8] . Over the years, many semiconductor compounds have been synthesized, including InAs, InSb, GaAs, InP, Mn:InP/ZnS, Ag:InP/ZnS, and Cu:InP/ZnS [6] , [9] , [10] , [11] , [12] . Particularly, InP has emerged as an exceptional material due to its outstanding high-performance luminescence, stability, large intrinsic extinction coefficient, large Bohr exciton radius, and wide emission range [13] .…”