Room-temperature direct synthesis of semi-conductive PbS nanocrystal inks for optoelectronic applications

Yongjie Wang, Zeke Liu, Nengjie Huo, Fei Li, Mengfan Gu, Xufeng Ling, Yannan Zhang, Kunyuan Lu, Lu Han, Honghua Fang, Artem G. Shulga, Ye Xue, Sijie Zhou, Fan Yang, Xun Tang, Jiawei Zheng, Maria Antonietta Loi, Gerasimos Konstantatos and Wanli Ma ()
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Yongjie Wang: Soochow University
Zeke Liu: Soochow University
Nengjie Huo: The Barcelona Institute of Science and Technology, Castelldefels
Fei Li: Soochow University
Mengfan Gu: Soochow University
Xufeng Ling: Soochow University
Yannan Zhang: Soochow University
Kunyuan Lu: Soochow University
Lu Han: Soochow University
Honghua Fang: University of Groningen
Artem G. Shulga: University of Groningen
Ye Xue: Soochow University
Sijie Zhou: Soochow University
Fan Yang: Soochow University
Xun Tang: Soochow University
Jiawei Zheng: Soochow University
Maria Antonietta Loi: University of Groningen
Gerasimos Konstantatos: The Barcelona Institute of Science and Technology, Castelldefels
Wanli Ma: Soochow University

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Lead sulphide (PbS) nanocrystals (NCs) are promising materials for low-cost, high-performance optoelectronic devices. So far, PbS NCs have to be first synthesized with long-alkyl chain organic surface ligands and then be ligand-exchanged with shorter ligands (two-steps) to enable charge transport. However, the initial synthesis of insulated PbS NCs show no necessity and the ligand-exchange process is tedious and extravagant. Herein, we have developed a direct one-step, scalable synthetic method for iodide capped PbS (PbS-I) NC inks. The estimated cost for PbS-I NC inks is decreased to less than 6 $·g−1, compared with 16 $·g−1 for conventional methods. Furthermore, based on these PbS-I NCs, photodetector devices show a high detectivity of 1.4 × 1011 Jones and solar cells show an air-stable power conversion efficiency (PCE) up to 10%. This scalable and low-cost direct preparation of high-quality PbS-I NC inks may pave a path for the future commercialization of NC based optoelectronics.

Date: 2019
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DOI: 10.1038/s41467-019-13158-6

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