Influence of surface engineering on the transport properties of lead sulfide nanomaterials
Article
Shu, Haibo, Zhao, Mingjun, Lu, Shaoqing, Wan, Shanhong, Genç, Aziz, Huang, Lulu, Ibanez, Maria, Lim, Khak Ho, Hong, Min and Liu, Yu. 2025. "Influence of surface engineering on the transport properties of lead sulfide nanomaterials." Journal of Colloid and Interface Science. 683 (Part 1), pp. 703-712. https://doi.org/10.1016/j.jcis.2024.12.067
Article Title | Influence of surface engineering on the transport properties of lead sulfide nanomaterials |
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ERA Journal ID | 1454 |
Article Category | Article |
Authors | Shu, Haibo, Zhao, Mingjun, Lu, Shaoqing, Wan, Shanhong, Genç, Aziz, Huang, Lulu, Ibanez, Maria, Lim, Khak Ho, Hong, Min and Liu, Yu |
Journal Title | Journal of Colloid and Interface Science |
Journal Citation | 683 (Part 1), pp. 703-712 |
Number of Pages | 10 |
Year | 2025 |
Publisher | Elsevier |
Place of Publication | United States |
ISSN | 0021-9797 |
1095-7103 | |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.jcis.2024.12.067 |
Web Address (URL) | https://www.sciencedirect.com/science/article/pii/S0021979724029199 |
Abstract | Lead Sulfide (PbS) has garnered attention as a promising thermoelectric (TE) material due to its natural abundance and cost-effectiveness. However, its practical application is hindered by inherently high lattice thermal conductivity and low electrical conductivity. In this study, we address these challenges by surface functionalization of PbS nanocrystals using Cu2S molecular complexes-based ligand displacement. The molecular complexes facilitate the incorporation of Cu into the PbS matrix and leads to the formation of nanoscale defects, dislocations, and strain fields while optimizing the charge carrier transport. The structural modulations enhance the phonon scattering and lead to a significant reduction in lattice thermal conductivity of 0.60 W m−1K−1 at 867 K in the PbS-Cu2S system. Simultaneously, the Cu incorporation improves electrical conductivity by increasing both carrier concentration and mobility with carefully optimized the content of Cu2S molecular complexes. These synergistic modifications yield a peak figure-of-merit (zT) of 1.05 at 867 K for the PbS-1.0 %Cu2S sample, representing an almost twofold enhancement in TE performance compared to pristine PbS. This work highlights the effectiveness of surface treatment in overcoming the intrinsic limitations of PbS-based materials and presents a promising strategy for the development of high-efficiency TE systems. |
Keywords | Interstitial doping; Lead sulfide nanocrystal; Surface-treatment; Lattice strain; Thermoelectricity |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 401605. Functional materials |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Hefei University of Technology, China |
Cardiff University, United Kingdom | |
Institute of Science and Technology Austria, Austria | |
Zhejiang University, Hangzhou, China | |
Quzhou University, China | |
School of Engineering | |
Centre for Future Materials |
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