Synthesis of green rod-in-rod CdSeS/CdZnS/ZnS nanorods with high quantum yield and linear polarization
Year: 2025
Type: article
Abstract: Nanorods (NRs) hold promise for surpassing the theoretical external quantum efficiency limit of light-emitting diodes (LEDs) based on spherical quantum dots (QDs) due to their linearly polarized emission and high photon out-coupling efficiency. Compared with the most studied dot-in-rod NRs, rod-in-rod NRs have higher degree of polarization. However, due to the difficulties in achieving uniform NR seeds, synthesizing rod-in-rod NRs that cover the entire visible spectrum remains a significant challenge, especially for green and blue ones. In this study, high-quality and uniformly sized green CdSeS NRs were successfully synthesized by systematically optimizing the S/Se ratio, the nucleation temperature and the amount of ligand. Based on these high-quality NR seeds, CdSeS/CdZnS/ZnS core-shell NRs were further prepared with narrow emission bandwidths (28 nm at 540 nm), high photoluminescent quantum yield (75%) and high linear polarization (r = 0.3). This study provides a new possibility for the application of NRs in LEDs, lasers and other optoelectronic devices.
Source: Nano Research
Authors: Xiao Liu, Yicheng Zeng, Qingya Wang, Xiaonan Liu, Yingying Sun, Min Li, Jing Wei, Fangze Liu, Hongbo Li
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $5,290
OpenAlex ID: W4409365341