| 查看: 1285 | 回复: 6 | ||||
| 当前主题已经存档。 | ||||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||||
[交流]
【请教】 type-I和type-II QDs的概念
|
||||
|
看文献时碰到的,高手能帮忙解释下type-I和type-II QDs的概念波? 还有它们各有什么特征 小妹刚结束量子点,很多基本的概念都不太懂. thx~~ [ Last edited by caosw2001 on 2009-2-26 at 08:56 ] |
回复此楼» 猜你喜欢
化工学院（学院正式调剂群+联系方式）
已经有0人回复
-
化工学院（学院官方群）-院士团队招生-学生自由度高-培养模式成熟高效
已经有0人回复
-
金属材料论文润色/翻译怎么收费?
已经有196人回复
-
黑龙江大学分析化学招调剂
已经有0人回复
-
武汉高校国家级人才团队招收材料，化学，纺织等专业硕士调剂生
已经有26人回复
-
纺大化工学院（官方群）-院士团队招生-学生自由度高发展好-培养模式成熟
已经有0人回复
-
温州大学化材学院王娟课题组招生
已经有5人回复
-
学院官方群-院士团队招生-学生自由度高-培养模式成熟已有10余名学生赴985海外深造
已经有0人回复
-
武汉纺织大学化工学院官方群-院士团队招生-学生自由度高-10余名学生赴985海外深造
已经有0人回复
-
南昌航空大学蒋华麟教授课题组招收化学、环境、碳达峰碳中和及相关专业硕士信息
已经有0人回复
-
湖北师范大学复试调剂
已经有0人回复
6楼2009-02-26 10:27:24
yesido
金虫 (正式写手)
- 应助: 1 (幼儿园)
- 贵宾: 0.02
- 金币: 1356.6
- 散金: 15
- 红花: 1
- 帖子: 720
- 在线: 165.1小时
- 虫号: 484066
- 注册: 2007-12-26
- 专业: 无机纳米化学
2楼2009-02-25 22:31:00
|
type-I QDs, where the band offsets are such that the conduction band of the shell (the higher band gap material) is of higher energy than that of the core (the lower band gap material), and the valence band of the shell is of lower energy than that of the core. As a result, both electrons and holes are confined in the cores. A type-II QD, in contrast, has both the valence and conduction bands in the core lower (or higher) than in the shell. As a result, one carrier is mostly confined to the core, while the other is mostly confined to the shell. |
3楼2009-02-25 23:36:36
refnew
专家顾问 (知名作家)
-
专家经验: +181 - MN-EPI: 4
- 应助: 678 (博士)
- 贵宾: 0.577
- 金币: 9465.7
- 散金: 229
- 红花: 54
- 帖子: 6391
- 在线: 1613.5小时
- 虫号: 33447
- 注册: 2003-12-31
- 性别: GG
- 专业: 纳米生物学
- 管辖: 微米和纳米
★ ★
caosw2001(金币+2,VIP+0):3x! 2-26 08:57
caosw2001(金币+2,VIP+0):3x! 2-26 08:57
|
正确的理解是这样的 Three cases can be distinguished, denominated type-I, reverse type-I, and type- II band alignment (cf. Figure 1). In the former, the bandgap of the shell material is larger than that of the core and both electrons and holes are confined in the core. In the second, the bandgap of the shell material is smaller than that of the core and, depending of the thickness of the shell, the holes and electrons are partially or completely confined in the shell. In the latter, either the valence-band edge or the conductionband edge of the shell material is located in the bandgap of the core. |
4楼2009-02-26 08:31:23
