Investigation of optical responsivity of BiFeO3-based photodetectors equipped with different electrode patterns

Ricky W. Chuang; Tsung-Han Tsai; Wei-Che Chuang; Cheng-Liang Huang

doi:10.1117/12.2655140

16 March 2023 Investigation of optical responsivity of BiFeO₃-based photodetectors equipped with different electrode patterns

Ricky W. Chuang, Tsung-Han Tsai, Wei-Che Chuang, Cheng-Liang Huang

Author Affiliations +

Proceedings Volume 12422, Oxide-based Materials and Devices XIV; 124220X (2023) https://doi.org/10.1117/12.2655140
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

In this study, two different metal electrode patterns are adopted, namely, the straight and curved electrodes, each of which contains 5 different numbers of pairs of interdigitated electrodes. The foregoing design is meant to investigate the resultant photocurrent and dark current magnitudes and the associated hysteresis loops by exposing samples of different numbers of pairs of electrodes to different incident light polarizations. Both linearly and circularly polarized lights are used as incident lights for the measurement of photocurrent. Regardless of its handedness, it is found that the device with curved interdigital electrodes can generate higher photocurrent, vis-à-vis ones with straight interdigitated electrodes. In particular, the device with 8 pairs of curved interdigitated electrodes could have the current enhanced by up to 60%. Finally, among all the photodetectors tested, the highest responsivity of up to 2.15 A/W has also been achieved.

Citation Download Citation

Ricky W. Chuang, Tsung-Han Tsai, Wei-Che Chuang, and Cheng-Liang Huang "Investigation of optical responsivity of BiFeO₃-based photodetectors equipped with different electrode patterns", Proc. SPIE 12422, Oxide-based Materials and Devices XIV, 124220X (16 March 2023); https://doi.org/10.1117/12.2655140

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