| ²é¿´: 374 | »Ø¸´: 1 | |||
| ±¾Ìû²úÉú 1 ¸ö ·ÒëEPI £¬µã»÷ÕâÀï½øÐв鿴 | |||
³¬¼¶ÀÏ¿ìľ³æÖ®Íõ (ÎÄѧ̩¶·)
|
[ÇóÖú]
Çë´ó¼Ò°ïæ¿´¿´Õâ¶ÎÓ¢ÎÄÓÐʲôÓï·¨´íÎó£¬ÓеϰÇëÖ¸³ö£¬Ð»Ð»£¡
|
||
| Cubic-to-hexagonal phase transformation and enhancement of upconversion emission are simultaneously achieved by modifying the ratio of ZnO/Na2O content in the Tb3+-Yb3+ co-doped oxyflouride Zincatesilion glass ceramics containing NaYF4 nanocrystals. XRD and TEM data have revealed through the crystallization of NaYF4 from ¨» phase to ¦Â phase. Additionally, upconversion emissions were obtained from these Tb3+-Yb3+ glass ceramics under 980 nm excitation. Compared with the cubic ¨»-NaYF4 nanocrystals of glass ceramics, the upconversion intensity augmented drastically due to the occurrence of phase transformation from the cubic NaYF4 to the hexagonal one. Therefore, the PL results showed that the cubic-to-hexagonal the NaYF4:Eu3+ lattice could induce a remarkable change of the PL intensity in red region (R=IED/IMD) with 393 nm excitation wavelength. It was indicated that it changed the phase transformation in Tb-Yb on symmetry of the lattice. |
» ²ÂÄãϲ»¶
Çóµ÷¼Á
ÒѾÓÐ23È˻ظ´
301Çóµ÷¼Á
ÒѾÓÐ15È˻ظ´
304Çóµ÷¼Á£¨085602£¬¹ýËļ¶£¬Ò»Ö¾Ô¸985£©
ÒѾÓÐ17È˻ظ´
302·ÖÇóµ÷¼Á Ò»Ö¾Ô¸°²»Õ´óѧ085601
ÒѾÓÐ12È˻ظ´
288»·¾³×¨Ë¶,Çóµ÷²ÄÁÏ·½Ïò
ÒѾÓÐ23È˻ظ´
»·¾³×¨Ë¶µ÷¼Á
ÒѾÓÐ6È˻ظ´
22408 µ÷¼Á²ÄÁÏ
ÒѾÓÐ6È˻ظ´
285Çóµ÷¼Á
ÒѾÓÐ12È˻ظ´
Çóµ÷¼Á
ÒѾÓÐ6È˻ظ´
085600²ÄÁÏÓ뻯¹¤301·ÖÇóµ÷¼ÁԺУ
ÒѾÓÐ19È˻ظ´
ÏĺƸè
ͳæ (СÓÐÃûÆø)
- ·ÒëEPI: 6
- Ó¦Öú: 6 (Ó×¶ùÔ°)
- ½ð±Ò: 156.6
- ºì»¨: 1
- Ìû×Ó: 119
- ÔÚÏß: 77Сʱ
- ³æºÅ: 3842044
- ×¢²á: 2015-04-30
- רҵ: ȼÉÕѧ
¡¾´ð°¸¡¿Ó¦Öú»ØÌû
¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï ¡ï
fjtony163: ½ð±Ò+1, ¹ÄÀøÓ¦Öú 2016-03-28 09:55:50
³¬¼¶ÀÏ¿ì: ½ð±Ò+50, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2016-03-29 11:13:51
fjtony163: ½ð±Ò+1, ¹ÄÀøÓ¦Öú 2016-03-28 09:55:50
³¬¼¶ÀÏ¿ì: ½ð±Ò+50, ·ÒëEPI+1, ¡ï¡ï¡ïºÜÓаïÖú 2016-03-29 11:13:51
|
±¾ÈËÑÐÒ»£¬Ã»·¢¹ýÓ¢ÎÄÂÛÎÄ£¬¶î£¬×ö¸ö²Î¿¼°É¡£ 1. XRD and TEM data have revealed£¨£© through the crystallization of NaYF4 from ¨» phase to ¦Â phase ÊDz»ÊÇÉÙÁË´ú´Ê £¬½ÒʾÁËʲô£¬º¬ºý²»Çå¡£ 2.Compared with£¨ the cubic ¨»-NaYF4 nanocrystals of glass ceramics£©, £¨the upconversion intensity£© augmented drastically due to the occurrence of phase transformation from the cubic NaYF4 to the hexagonal one ¾ä×ÓµÄÂß¼±í´ïÓÐÎÊÌ⣬Compared with A£¬B¡£¡£¡£ due to¡£¡£¡£ÓÃCompared with£¬Óë¡£¡£Ïà±È£¬AºÍBÓ¦¸ÃÊÇÒ»ÀàµÄ 3.Therefore, the PL results showed that Õâ¸öÆäʵÓÐÒìÒéµÄ£¬Ó¢ÎÄÂÛÎÄÀïÓÐtherefore·Å¾äÊ׵쬵«ÊǵصÀµãµÄ»°£¬»¹ÊǷžäÖбȽϺᣠ4.It was indicated that£¨it£© changed the phase transformation in Tb-Yb on symmetry of the lattice ÕâÀïitÖØ¸´Ó÷¨½ÏÉÙ£¬ºÍÉϾäÏνӵÄÒ²ÓÐЩÎÊÌâ¡£ ¶î£¬²»ÊÇÄãÕâ¸öרҵµÄ¶ÁµÄ²»ÊǺܶ®£¬¸Ð¾õÉÏÏÂÎÄÏνӵÄÓÐЩÎÊÌ⣬ÎÒ¾ÍÊÇÀ´×½³æµÄ£¬¸Ä¶¯µÄ»°£¬¿´ÆäËû´óÉñµÄ°É |
2Â¥2016-03-28 09:31:05














»Ø¸´´ËÂ¥