卟啉及金属卟啉的瞬态表面光伏特性  

Transient Surface Photovoltage Properties of Porphyrins and Metalloporphyrins

作　　者：郑文琦[1] 单凝[1] 魏霄[1] 张萍[1] 王杏乔[1] 

机构地区：[1]吉林大学化学学院

出　　处：《吉林大学学报（理学版）》2008年第2期355-357,共3页Journal of Jilin University:Science Edition

基　　金：国家自然科学基金(批准号:200710142047303320673049)

摘　　要：通过对比研究卟啉单体、二聚体及金属卟啉单体的瞬态光电压性质,发现其光生电子-空穴对完全分离的时间:单体小于二聚体,卟啉配体小于金属卟啉.卟啉配体电荷载流子缓慢衰减,而金属卟啉在短时间内,电子在接近半导体表面空间电荷区域里实现了载流子的快速分离.Cu卟啉的光生电荷载流子瞬态光电压信号与卟啉配体有相似之处,且与其他金属卟啉也有相似之处.在金属离子Co2+,N i2+,Cu2+,Zn2+的影响下,电子-空穴对开始分离的时间大约在2×10-7s,负信号是由接近半导体表面空间电荷区域内快速载流子分离所致,金属卟啉中心离子d电子数不同,光生电荷载流子快速分离时间也略有不同.Transient surface photovoltage propertie of porphyrins and metalloporphyrins were studied. The photogenerated electron-hole full separation time of porphyrin monomer was shorter than that of the dimer, and the photogenerated electron-hole full separation time of porphyrin monomer was shorter than those of metalloporphyrins. The transient surface photovoltaie signal of porphyrin-Cu is an especial one among those of metalloporphyrins. It had similarities to those of metal free porphyrins, and also similarities to those of metalloporphyrins. The different central ions had different influences on the separation rate of charge carriers.

关 键 词：卟啉 金属卟啉 瞬态表面光伏特性 

分 类 号：O646[理学—物理化学]