Exploring Alternative Ligands for PbS Quantum Dot Photovoltaics

Alexandra Golikova^a^,^b, Raquel Dantas-Camposa^a^,^b, Anatol Prudnikau^a, Vladimir Shilovskikh^a^,^b, Yana Vaynzof^a^,^b

^aLeibniz Institute for Solid State and Materials Research, Helmholtzstr. 20, 01069 Dresden, Germany

^bChair for Emerging Electronic Technologies, Technische Universität Dresden, Nöthnitzer Straße 61, 01187 Dresden, Germany

Materials for Sustainable Development Conference (MATSUS)
Proceedings of MATSUS Spring 2025 Conference (MATSUSSpring25)

III-V Quantum Dots and Beyond: Pioneering Core-only and Core-Shell Structures for Future Applications - #III-VQD

Sevilla, Spain, 2025 March 3rd - 7th

Organizers: Ivan Infante and Liberato Manna

Poster, Alexandra Golikova, 639
Publication date: 16th December 2024

PbS colloidal quantum dots have emerged as promising candidates for cost-effective and efficient photovoltaics due to their IR absorption, bandgap tunability, multiexciton generation, and solution processability [ 1–3 ]. Numerous studies are dedicated to advancing this technology, yet the choice of ligands remains limited with most reports utilizing PbX2 (X=I, Br). [ 4–6 ]. In our study, we are exploring alternative strategies for the choice of ligands, focusing on lead-free compositions. This is motivated by our aim to explore innovative approaches for improving the performance of quantum dot-based devices, while simultaneously minimizing the environmental footprint. We focus on optimizing the liquid phase ligand exchange of PbS quantum dots and assessing their compositional, structural, optical, and electronic properties. Finally, we explore how the choice of ligands impacts on the performance and stability of the photovoltaic devices. These findings can contribute to the development of more sustainable and less toxic quantum dot-based solar cells.

References:

[1] Ding C. et al. Over 15% Efficiency PbS Quantum‐Dot Solar Cells by Synergistic Effects of Three Interface Engineering: Reducing Nonradiative Recombination and Balancing Charge Carrier Extraction Advanced Energy Materials, 12(35), 2201676.

[2] Albaladejo‐Siguan, M., Baird, E. C., Becker‐Koch, D., Li, Y., Rogach, A. L., & Vaynzof, Y. (2021). Stability of quantum dot solar cells: a matter of (life) time. Advanced Energy Materials, 11(12), 2003457.

[3] Mahajan, C., Sharma, A., & Rath, A. K. (2020). Solution-phase hybrid passivation for efficient infrared-band gap quantum dot solar cells. ACS Applied Materials & Interfaces, 12(44), 49840-49848.

[4] Kumar, S., Bharti, P., & Pradhan, B. (2023). Performance optimization of efficient PbS quantum dots solar cells through numerical simulation. Scientific Reports, 13(1), 10511

[5] Li, J., Zhang, X., Liu, Z., Wu, H., Wang, A., Luo, Z., ... & Zheng, W. (2024). Optimizing Energy Levels and Improving Film Compactness in PbS Quantum Dot Solar Cells by Silver Doping. Small, 2311461.

[6] Wang, D., Xing, M., Wei, Y., Wang, L., Wang, R., & Shen, Q. (2021). Modeling of nucleation and growth in the synthesis of PbS colloidal quantum dots under variable temperatures. ACS omega, 6(5), 3701-3710.

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