| US 7,468,168 B2 | ||
| Method of preparing cadmium sulfide nanocrystals emitting light at multiple wavelengths, and cadmium sulfide nanocrystals prepared by the method | ||
| Eun Joo Jang, Gyeonggi-Do (Korea, Republic of); Shin Ae Jun, Gyeonggi-Do (Korea, Republic of); Tae Kyung Ahn, Seoul (Korea, Republic of); Sung Hun Lee, Gyeonggi-Do (Korea, Republic of); and Seong Jae Choi, Seoul (Korea, Republic of) | ||
| Assigned to Samsung Electronics Co., Ltd., Suwon-Si, Gyeonggi-Do (Korea, Republic of) | ||
| Filed on Dec. 03, 2004, as Appl. No. 11/2,490. | ||
| Claims priority of application No. 10-2004-0038392 (KR), filed on May 28, 2004. | ||
| Prior Publication US 2006/0062720 A1, Mar. 23, 2006 | ||
| Int. Cl. C01G 11/02 (2006.01) | ||
| U.S. Cl. 423—99 [423/101; 423/566.1; 977/773; 977/775; 313/503; 252/301.4 S; 362/800] | 27 Claims |
| 1. A method for preparing cadmium sulfide nanocrystals emitting light at multiple wavelengths, comprising the steps of:
(a) mixing a cadmium precursor and a dispersant with a solvent weakly coordinating to the cadmium precursor, and heating the
mixture to obtain a cadmium precursor solution;
(b) dissolving a sulfur precursor in a solvent weakly coordinating to the sulfur precursor to obtain a sulfur precursor solution;
and
(c) feeding the sulfur precursor solution to the heated cadmium precursor solution to prepare cadmium sulfide crystals, and
growing the cadmium sulfide crystals,
wherein a resultant cadmium sulfide nanocrystal shows maximum luminescence peaks at two or more wavelengths.
|