高等学校化学学报

高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (03): 560.doi: 10.3969/j.issn.0251-0790.2012.03.024

• 物理化学 • 上一篇    下一篇

纳米ZnO光伏特性分析

李子亨1,2, 李根2, 杜艳2, 王德军3, 邹广田1   

  1. 1. 吉林大学超硬材料国家重点实验室,长春 130012;
    2. 吉林大学物理学院,长春 130012;
    3. 吉林大学化学学院, 长春 130012
  • 收稿日期:2011-07-04 出版日期:2012-03-10 发布日期:2012-03-10
  • 通讯作者: 李子亨, 男, 博士, 副教授, 主要从事纳米材料表面与界面化学物理研究. E-mail:liziheng@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 20803031)和吉林大学基本科研业务费科学前沿与交叉学科创新项目(批准号: 200903327)资助.

Photovoltaic Characteristics of ZnO Nanoparticles

LI Zi-Heng1,2, LI Gen2, DU Yan2, WANG De-Jun3, ZOU Guang-Tian1   

  1. 1. National Key Laboratory of Superhard Materials,Jilin University, Changchun 130012, China;
    2. College of Physics,Jilin University, Changchun 130012, China;
    3. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2011-07-04 Online:2012-03-10 Published:2012-03-10

PDF (PC)

被引次数

8

摘要：

利用表面光电压谱(SPS)和瞬态光伏(TRP)技术研究了纳米ZnO的光生电荷行为, 发现TRP曲线时域为10-9~10-7和10-6~10-3 s时样品的SPS在320~380 nm处出现光伏响应, 时域为10-3~10-1 s时样品的SPS在380~420 nm处出现光伏响应. 这3个时域分别对应着纳米晶本征响应、 晶间电荷转移和纳米晶表面态电荷捕获等过程. 光生电荷密度足够大或受外部电场影响时在300~320 nm区间也出现光伏响应.

关键词: 纳米晶, 光伏特性, 电荷密度, 电荷转移, 时域

Abstract:

Transient photovoltaic technology(TRP) and surface photovoltaic spectrum(SPS) were used for studying the photogenerated charge of nano-ZnO. The results show that when the time domain of TRP range of 10-9—10-7 and 10-6—10-3 s, the photovoltage response of SPS appears in range of 320—380 nm. But when time domain is range of 10-3—10-1 s, the photovoltage appears in range of 380—420 nm. The three time domains of TRP were belonged to intrinsic transition of nanocrystals, the charge transfer between nanocrystals and surface-state trapping of nanocrystals, respectively. If the intensity of photocharge was large enough or an exexternal electric field was used, then the photovoltage also appeared in range of 300—320 nm.

Key words: Nanocrystal, Photovoltaic characteristics, Charge density, Charge transfer, Time domain

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