Room-temperature direct synthesis of semi-conductive PbS nanocrystal inks for optoelectronic applicationsWang, Y., Liu, Z., Huo, N., Li, F., Gu, M., Ling, X., Zhang, Y., Lu, K., Han, L., Fang, H., Shulga, A. G., Xue, Y., Zhou, S., Yang, F., Tang, X., Zheng, J., Loi, M. A., Konstantatos, G. & Ma, W., 13-Nov-2019, In : Nature Communications. 10, 8 p., 5136.
Research output: Contribution to journal › Article › Academic › peer-review
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, photo-detector devices show a high detectivity of 1.4 x 10(11) 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.
|Number of pages||8|
|Publication status||Published - 13-Nov-2019|
- QUANTUM-DOT SOLIDS, SOLAR-CELLS, LEAD SULFIDE, THIOUREA