Department of Chemistry, Vanderbilt University, VU Station B Box 351822, Nashville, Tennessee 37235, United States.
J Am Chem Soc. 2012 May 16;134(19):8006-9. doi: 10.1021/ja300132p. Epub 2012 May 7.
A simple treatment method using formic acid has been found to increase the fluorescence quantum yield of ultrasmall white light-emitting CdSe nanocrystals from 8% to 45%. Brighter white-light emission occurs with other carboxylic acids as well, and the magnitude of the quantum yield enhancement is shown to be dependent on the alkyl chain length. Additionally, the nanocrystal luminescence remains enhanced relative to the untreated nanocrystals over several days. This brightened emission opens the possibility for even further quantum yield improvement and potential for use of these white-light nanocrystals in solid-state lighting applications.
一种简单的甲酸处理方法被发现可以将超小的发白光 CdSe 纳米晶体的荧光量子产率从 8%提高到 45%。其他羧酸也能产生更亮的白光发射,并且量子产率增强的幅度被证明与烷基链长度有关。此外,纳米晶体的发光在几天内仍保持相对于未处理的纳米晶体的增强。这种增强的发射为进一步提高量子产率提供了可能,并为这些发白光的纳米晶体在固态照明应用中的潜在应用打开了大门。