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- Title
Room-temperature direct synthesis of semi-conductive PbS nanocrystal inks for optoelectronic applications.
- Authors
Wang, Yongjie; Liu, Zeke; Huo, Nengjie; Li, Fei; Gu, Mengfan; Ling, Xufeng; Zhang, Yannan; Lu, Kunyuan; Han, Lu; Fang, Honghua; Shulga, Artem G.; Xue, Ye; Zhou, Sijie; Yang, Fan; Tang, Xun; Zheng, Jiawei; Antonietta Loi, Maria; Konstantatos, Gerasimos; Ma, Wanli
- 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 × 1011Jones 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. Providing large-scale iodide capped semi-conductive PbS nanocrystals inks preparation for high-throughput manufacturing remains a challenge. Here, the authors propose a direct one step and scalable synthesis method enabling cost reduction and promoting its commercial viability for solar cells.
- Subjects
OPTOELECTRONIC devices; LEAD sulfide; NANOCRYSTALS; SOLAR cells; PHOTODETECTORS
- Publication
Nature Communications, 2019, Vol 10, Issue 1, pN.PAG
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-019-13158-6