Magnetic Field Effect on Photocarriers in an Organic Film Studied by Simultaneous Optical and Electrical Detection

被引：0
作者：
Miura, Tomoaki [1 ]
Kobayashi, So [1 ]
Ikoma, Tadaaki [1 ,2 ]
机构：
[1] Niigata Univ, Grad Sch Sci & Technol, Niigata 9502181, Japan
[2] Niigata Univ, Ctr Coordinat Res Facil, Niigata 9502181, Japan
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2024年 / 128卷 / 45期
基金：
日本学术振兴会;
关键词：
TRANSIENT ABSORPTION-SPECTROSCOPY; HETEROJUNCTION SOLAR-CELLS; CARRIER GENERATION; MAGNETORESISTANCE; MECHANISM; PAIR; POLY(3-HEXYLTHIOPHENE); DYNAMICS; KINETICS;
D O I：
10.1021/acs.jpcc.4c05290
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Magnetic field effects (MFEs) on the electric conductance in organic semiconductor films provide valuable information regarding the carrier dynamics. There have been reported two major mechanisms for the MFE; one is due to electron-hole pair recombination, and the other is due to bipolaron formation from two carriers of the same charge. Although the former and latter effects appear on the concentration and drift mobility of the charges, respectively, the observed MFEs on the conductance are similar. For a clearer assignment of the MFE mechanism, we have utilized simultaneous optical and electrical detection of the time-dependent MFE on the photocarriers in a P3HT:PCBM bulk heterojunction film. The optical signal proportional to the concentration and the electrical signal proportional to the concentration and the mobility exhibit similar MFEs, which demonstrate that the electron-hole pair mechanism is dominant in the present film.
引用
收藏
页码：19242 / 19247
页数：6
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