纳米ZnO光伏特性分析  

Photovoltaic Characteristics of ZnO Nanoparticles

作　　者：李子亨[1,2] 李根[2] 杜艳[2] 王德军[3] 邹广田[1] 

机构地区：[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

出　　处：《高等学校化学学报》2012年第3期560-563,共4页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:20803031);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

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10-6～10-3s时样品的SPS在320～380 nm处出现光伏响应,时域为10-3～10-1s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.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.

关 键 词：纳米晶 光伏特性 电荷密度 电荷转移 时域 

分 类 号：O644.1[理学—物理化学]