Photocarrier transport in iron-doped potassium lithium tantalate niobate studied by time-of-flight measurement
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- 作者：Zhongxiang Zhou ; Yang Li ; Hao Tian ; Jun Li ; Yuqiang Liu ; Yanqiang Yang
- 关键词：KLTN ; Photocarrier mobility ; Time-of-flight
- 刊名：Optics Communications
- 出版年：2009
- 出版时间：1 July 2009
- 年：2009
- 卷：282
- 期：13
- 页码：2624-2627
- 全文大小：330 K
文摘
The photocarrier mobility of Fe 0.03 wt % -doped potassium lithium tantalate niobate (K0.95Li0.05Ta0.61Nb0.39O3) was investigated by time-of-flight (TOF) measurement. The longitudinal photocarrier response due to pulsed excitation leads to values of the drift mobility of μh = 1.45 × 10−2 cm2/V s for holes, μe = 0.325 × 10−2 cm2/V s for electrons, and a value for the range of holes (μτ)h = 4.38 × 10−5 cm2/V at room temperature and at low field 3 KV/cm. The response time of holes and electrons (or the relaxation time) is determined to be 3.02 × 10−3 s and 3.74 × 10−3 s, respectively. The mobility of holes strongly depends on the field strength, and is observed to decrease with increasing bias field.