Multi‐Dimensional Quantum Nanostructures with Polarization Properties for Display Applications

Abstract

Colloidal semiconductor nanocrystals (NCs), or quantum nanostructures with various dimensions and morphologies, are excellent emerging solution‐processable luminescent materials for display applications. The future of semiconductor NCs in the display market strongly relies on the development of low energy consuming devices. Replacing spherical NCs with multi‐dimensional nanostructures that emit linearly or circularly polarized light with high color purity and brightness, can significantly enhance the performance and efficiency of future display devices. In this review, we highlight some recent advances of colloidal syntheses of multi‐dimensional quantum nanostructures and their implementation as polarized light sources. The most representative examples are quasi‐one‐dimensional (q‐1D) CdSe/CdS dot‐in‐rods with strong linearly polarized emission for liquid crystal display technologies, and two‐dimensional (2D) nanoplatelets with enhanced circular dichroism signals as potential circularly polarized luminescence sources for electroluminescence applications.

Thermally Stable Quantum Rods, Covering Full Visible Range for Display and Lighting Application

“…Particularly, for liquid crystal displays (LCD), unidirectionally aligned QRs are very promising as an enhancement film (QREF) for display backlight unit (BLU) replacing quantum dot enhancement films (QDEFs). [ 21–24 ] Because of the polarized emission, and higher light out‐coupling coefficients, QRs improve the overall optical efficiency of LCDs. [ 21,22,25 ] Three possible configurations have been explored for the QD‐based BLU for LCDs: i) edge optics proposed by QD Vision (Massachusetts), ii) QDEFs proposed by Nanosys (California); and iii) a QD‐on‐chip design proposed by LumenMax Optoelectronics (Taiwan).…”

“…[ 21–24 ] Because of the polarized emission, and higher light out‐coupling coefficients, QRs improve the overall optical efficiency of LCDs. [ 21,22,25 ] Three possible configurations have been explored for the QD‐based BLU for LCDs: i) edge optics proposed by QD Vision (Massachusetts), ii) QDEFs proposed by Nanosys (California); and iii) a QD‐on‐chip design proposed by LumenMax Optoelectronics (Taiwan). On‐chip configuration is a most desirable format because it requires less QD material per display, and has maximum ease of system integration.…”

Simple Perylene Diimide Cyclohexane Derivative With Combined CPL and TPA Properties

“…Organic materials presenting circularly polarized luminescence (CPL) (Riehl and Richardson, 1977;Kumar et al, 2015;Sanchez-Carnerero et al, 2015;Longhi et al, 2016;Tanaka et al, 2018) have recently emerged as promising candidates for advanced optical applications (Zinna et al, 2015;Han et al, 2018;Shi et al, 2018;Zheng et al, 2018;Burrezo et al, 2019;David et al, 2019;Jiménez et al, 2019;Pop et al, 2019;Yang and Zhong, 2019). Thus for example, CPL emitters have been proposed as chiroptical sensors (Staszak et al, 2019), for smart sensing methodologies (Imai et al, 2018;Reine et al, 2018a,b;Zinna et al, 2019), to encode information in light (Andréassons and Pischel, 2018), in patterning processes using security inks (Andres et al, 2014), or constituents of CPL organic lightemitting diodes OLEDs (Brandt et al, 2016;Di Nuzzo et al, 2017).…”

Material Challenges for Colloidal Quantum Nanostructures in Next Generation Displays

“…Indeed, nanorods, as well as other 1D systems, exhibit intrinsic linearly polarized emission along their long axis, in contrast to the non-polarized emission of the spherical 0D structures. 11 This trait is also expressed in mixed dimensionality structures, of 0D-1D such as the dot-in-rod structure discussed above. can also demonstrate highly directional emission.…”