@article{Luo2026, 
author = {Hao Luo and Zhijiao Huang and Bo-Yi Deng and Chenyu Zhang and Yang Liu and Ke Peng and Rui Long and Xiangzhen Deng and Daoli Zhang and Liang Gao and Yanwei Wen and Jianbing Zhang and Jiang Tang},
title = {High-performance quantum dots enabled by supplementary passivation using ethoxydiphenylphosphine},
year = {2026},
journal = {Nano Research},
keywords = {quantum dots, solar cells, infrared imaging, supplementary passivation},
url = {https://www.sciopen.com/article/10.26599/NR.2026.94908748},
doi = {10.26599/NR.2026.94908748},
abstract = {Colloidal quantum dots (QDs) are pivotal to next-generation optoelectronics due to their exceptional quantum confinement effects and solution-processability. However, the high density of surface dangling bonds and vacancy defects inherent in QDs remains a primary bottleneck, inducing non-radiative recombination and limiting device performance. While conventional X-, L-, and Z-type ligand passivation strategies have been developed, achieving a "defect-free" surface for high-performance applications remains challenging. In this work, we introduce ethoxydiphenylphosphine (EDPP) as a universal complementary passivation strategy. For atomic ligand-capped PbS QD systems, EDPP treatment significantly improves QD film quality, enabling solar cells to reach a state-of-the-art infrared power conversion efficiency of 1.50% (under 1100 nm filtering). Furthermore, EDPP-passivated PbS QD photodetectors exhibit a 71.3% reduction in dark current and a peak specific detectivity (D*) of 6.34×1012 Jones at 1300 nm. The versatility of EDPP is further validated across various long-chain QD architectures, including InP/ZnSe/ZnS, CdSe/ZnS, PbSe/PbS and so on, where it boosts photoluminescence quantum yield (PLQY) by up to 55.3%. These findings demonstrate that EDPP is a robust tool for precise surface state modulation, paving the way for high-performance, industrial-grade QD optoelectronic applications.}
}