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Title: Optically pumped colloidal-quantum-dot lasing in LED-like devices with an integrated optical cavity

Journal Article · · Nature Communications
ORCiD logo [1]; ORCiD logo [2];  [3]; ORCiD logo [4]
  1. Pusan National Univ., Busan (Korea); Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Univ. of New Mexico, Albuquerque, NM (United States)
  3. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); Ajou Univ., Suwon (Korea)
  4. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Realization of electrically pumped lasing with solution processable materials will have a revolutionary impact on many disciplines including photonics, chemical sensing, and medical diagnostics. Due to readily tunable, size-controlled emission wavelengths, colloidal semiconductor quantum dots (QDs) are attractive materials for attaining this goal. Here we use specially engineered QDs to demonstrate devices that operate as both a light emitting diode (LED) and an optically pumped laser. These structures feature a distributed feedback resonator integrated into a bottom LED electrode. By carefully engineering a refractive-index profile across the device, we are able to obtain good confinement of a waveguided mode within the QD medium, which allows for demonstrating low-threshold lasing even with an ultrathin (about three QD monolayers) active layer. These devices also exhibit strong electroluminescence (EL) under electrical pumping. The conducted studies suggest that the demonstrated dual-function (lasing/EL) structures represent a promising device platform for realizing colloidal QD laser diodes.

Research Organization:
Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
Sponsoring Organization:
USDOE Laboratory Directed Research and Development (LDRD) Program
Grant/Contract Number:
89233218CNA000001
OSTI ID:
1619766
Alternate ID(s):
OSTI ID: 1593117
Report Number(s):
LA-UR-19-29883
Journal Information:
Nature Communications, Vol. 11, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Quantum Dot Light-Emitting Devices with Electroluminescence Tunable over the Entire Visible Spectrum journal July 2009
Suppression of Auger Processes in Confined Structures journal January 2010
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Continuous-wave lasing in colloidal quantum dot solids enabled by facet-selective epitaxy journal March 2017
Low-threshold amplified spontaneous emission and lasing from colloidal nanocrystals of caesium lead halide perovskites journal August 2015
Microsecond-sustained lasing from colloidal quantum dot solids journal October 2015
Lead halide perovskite nanowire lasers with low lasing thresholds and high quality factors journal April 2015
Optical gain in colloidal quantum dots achieved with direct-current electrical pumping journal November 2017
Whispering-gallery-mode biosensing: label-free detection down to single molecules journal June 2008
Red, green and blue lasing enabled by single-exciton gain in colloidal quantum dot films journal April 2012
Hybrid perovskite light emitting diodes under intense electrical excitation journal November 2018
Full-color laser displays based on organic printed microlaser arrays journal February 2019
High-efficiency colloidal quantum dot infrared light-emitting diodes via engineering at the supra-nanocrystalline level journal December 2018
Visible quantum dot light-emitting diodes with simultaneous high brightness and efficiency journal February 2019
Photonic band structure and emission characteristics of a metal-backed polymeric distributed feedback laser journal August 2002
Low-threshold polymeric distributed feedback lasers with metallic contacts journal April 2004
Amplified spontaneous emission in an organic semiconductor multilayer waveguide structure including a highly conductive transparent electrode journal May 2005
Electroluminescence from heterostructures of poly(phenylene vinylene) and inorganic CdSe nanocrystals journal June 1998
Flexible and Ultra-Lightweight Polymer Membrane Lasers conference June 2019
Toward continuous-wave operation of organic semiconductor lasers journal April 2017
Optical Gain and Stimulated Emission in Nanocrystal Quantum Dots journal October 2000
Sub–single-exciton lasing using charged quantum dots coupled to a distributed feedback cavity journal August 2019
Vertical Cavity Biexciton Lasing in 2D Dodecylammonium Lead Iodide Perovskites journalarticle January 2018
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