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Realizing high-responsive superlattice organic photodiodes by C60 and zinc phthalocyanine

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Abstract

Organic superlattices, consisting of alternating thin films of different organic molecules, are expected to provide new molecule assembly and unique properties that are applicable to advanced optoelectronic devices. Adopting organic superlattice as the structure of active layer may be an appropriate trade-off between planar heterojunctions and bulk heterojunction. With this structure, exciton diffusion efficiency and carrier mobility can be appropriately improved at the same time, leading to the optimization of device performance. In this paper, superlattice organic photodiodes based on heterojunction composed of C60 and zinc phthalocyanine were fabricated and characterized. We demonstrate good optoelectronic properties of these devices with superlattice structure through experimental data. It is found that the performances of the devices are strongly dependent on the incident optical power and the number of heterojunction periods, n. We optimized n and obtained high-responsive devices. The SL-OPD with n = 3 exhibits the photoresponsivity up to 5.21 (± 0.26) A W−1 at the incident optical intensity of 0.068 (± 0.003) mW cm−2.

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Acknowledgements

This work was supported by the National Key R&D Program of China, Grant No. 2016YFF0203605, and the Natural Science Foundation of Zhejiang Province, Grant No. LY18F050009.

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Authors and Affiliations

  1. College of Optical and Electronic Technology, China Jiliang University, Hangzhou, 310018, China

    Rongzheng Ding, Ziqiang Xu, Yingquan Peng, Wenli Lv, Yuhuan Yang, Sunan Xu & Lei Sun

  2. School of Physical Science and Technology, Institute of Microelectronics, Lanzhou University, Lanzhou, 730000, China

    Tingcai Zheng, Fobao Huang & Sunan Xu

  3. College of Information Engineering, China Jiliang University, Hangzhou, 310018, China

    Ying Wang

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  1. Rongzheng Ding
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Correspondence to Yingquan Peng.

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Ding, R., Xu, Z., Zheng, T. et al. Realizing high-responsive superlattice organic photodiodes by C60 and zinc phthalocyanine. J Mater Sci 54, 3187–3195 (2019). https://doi.org/10.1007/s10853-018-3052-3

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  • DOI: https://doi.org/10.1007/s10853-018-3052-3

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