Negative capacitance in an organic solar cell observed by displacement current measurement

Koji Shimizu, Yuya Tanaka, Yutaka Noguchi, Hisao Ishii

Research output: Contribution to journalConference articlepeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number012012
JournalJournal of Physics: Conference Series
Volume924
Issue number1
DOIs
Publication statusPublished - 5 Dec 2017
Event12th International Conference on Nanomolecular Electronics, ICNME 2016 - Kobe, Japan
Duration: 14 Dec 201616 Dec 2016

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