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NOGUCHI Yutaka
Department Undergraduate School , School of Science and Technology Position Professor |
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| Language | English |
| Publication Date | 2017/11 |
| Type | Academic Journal |
| Peer Review | Peer reviewed |
| Title | Negative capacitance in an organic solar cell observed by displacement current measurement |
| Contribution Type | Co-authored (other than first author) |
| Journal | Journal of Physics: Conference Series |
| Journal Type | Another Country |
| Publisher | IOP Publishing |
| Volume, Issue, Page | 924,pp.012012 |
| Author and coauthor | Koji Shimizu, Yuya Tanaka, Yutaka Noguchi, Hisao Ishii |
| Details | We applied displacement current measurement (DCM) to an organic solar cell (OSC) with a structure of ITO/CuPc/C60/BCP/Al in order to investigate the origin of a negative capacitance (NC). In DCM curve, an anomalous characteristic that the current in backward scan was larger than that in forward scan was observed. We found that this characteristic originates from a gradual increase of an additional current, leading to NC in DCM. The additional current can be explained by the increase of the device temperature owing to a Joule heat and thermal deactivation of the exciton. Moreover, NC value was observed to be enhanced by light irradiation due to an additional temperature increase. |