Solution-processed electroluminescent white-light-emitting devices based on AIE molecules and Cu-In-Zn-S nanocrystals

Abstract

Solution process is a key technique for the manufacture of large-area and low-cost semiconducting devices and, thus, attracts a lot of attention from both academia and industry. Herein, we realized solution-processed light-emitting diodes (excluding a cathode) based on aggregation-induced emission (AIE) molecules of tetraphenylethylene-4Cl (TPE-4Cl) and cadimum-free semiconductor nanocrystals (NCs) for the first time. By mixing Cu-In-Zn-S NCs and TPE-4Cl as an emissive layer, a new type of environmentally friendly white-light-emitting diodes (WLEDs) was prepared through a solution-processed technique. After systematical optimization of the as-prepared WLEDs, the corresponding color rendering index can reach up to 87 with a maximum luminance of 262 cd/ m 2 . This study may pave a new road to realize AIE-based WLEDs through a solution-processed technique.

Nano scattering particle: an approach to improve quality of the commercial led

“…The Mie-scattering function [23][24][25][26] of spherical particles is applied to investigate the scattering factor of the TiO2 in the phosphor layer. The calculated scattering factors include 𝜇 𝑠𝑐 (𝜆)scattering coefficients (SC) and 𝛿 𝑠𝑐reduced scattering coefficients (RSC).…”

Boosting Cu─In─Zn─S‐based Quantum‐Dot Light‐Emitting Diodes Enabled by Engineering Cu─NiOx/PEDOT:PSS Bilayered Hole‐Injection Layer

“…[8] Yet, most of the QLEDs are based on CdSe quantum dots (QDs). [9,10] However, the majority of QLEDs are built using CdSe quantum dots, while the intrinsic chemical toxicity of Cd prevents the continued development, despite their remarkable performance [11,12] InP, [13] ZnSe, [14] and CIZS [15] have all been extensively researched as alternatives. Among them, owing to the low toxicity, ease of synthesis, low cost, and high photoluminescence quantum yield (PLQY), CIZS nanocrystals (NCs) have garnered the most attention.…”