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Erschienen in:
2020 | OriginalPaper | Buchkapitel
Determining Hole Mobility of Zinc Phthalocyanine Thin Films by Light-Intensity-Dependent Current–Voltage Characteristics
verfasst von : Yinqin Ye, Fobao Huang, Yingquan Peng, Wenli Lv, Sunan Xu, Yi Wei, Lei Sun, Ying Wang
Erschienen in: Proceedings of 2018 International Conference on Optoelectronics and Measurement
Verlag: Springer Singapore
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Abstract
Carrier mobility is a basic parameter of organic semiconductors. In this paper, hole mobility of zinc phthalocyanine (ZnPc) thin films was determined by light-intensity-dependent current–voltage characteristics. Firstly, built-in voltage, Vbi, of the organic diode with the structure of “ITO/zinc phthalocyanine (ZnPc)/2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP)/Al” was measured as 0.45 V by using saturation photovoltage method. Based on the value of Vbi, the hole mobility of ZnPc thin film was (1.619 ± 0.06) × 10−6 cm2 V−1 s−1 by fitting the measured photocurrent–voltage characteristic with the established theory of space-charge-limited photocurrent conduction. The measured carrier mobility coincides with that reported in other literature.