Edward H. Sargent课题组报道了一种新的溶液-相配体交换,其中(100)和(111)特定晶面分别被钠和卤化铅选择性地钝化。该方法使得能够实现具有改善的胶体稳定性和光物理性质的窄带隙胶体量子点。特定晶面钝化显着提高了红外太阳能电池的性能,与传统的仅含卤化物的钝化相比,功率转换效率提高了50%。
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Y. Kim, F. Che, J. W. Jo, J. Choi, F. P. García de Arquer, O. Voznyy, B. Sun, J. Kim, M.-J. Choi, R. Quintero-Bermudez, F. Fan, C. S. Tan, E. Bladt, G. Walters, A. H. Proppe, C. Zou, H. Yuan, S. Bals, J. Hofkens, M. B. J. Roeffaers, S. Hoogland, E. H. Sargent. A Facet-Specific Quantum Dot Passivation Strategy for Colloid Management and Efficient Infrared Photovoltaics. Adv. Mater.
Doi:10.1002/adma.201805580.
https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201805580