SWIR imaging using PbS QD photodiode array sensors

Sehwan Chang, Junyoung Jin, Jihoon Kyhm, Tae Hwan Park, Jongtae Ahn, Sung Yul L. Park, Suk In Park, Do Kyung Hwang, Sang Soo Choi, Tae Yeon Seong, Jin Dong Song, Gyu Weon Hwang

    Research output: Contribution to journalArticlepeer-review

    2 Citations (Scopus)

    Abstract

    We fabricated a 1 × 10 PbS QD photodiode array with multiple stacked QD layers with high-resolution patterning using a customized photolithographic process. The array showed the average responsivity of 5.54 × 10−3 A/W and 1.20 × 10−2 A/W at 0 V and -1 V under 1310- nm short-wavelength infrared (SWIR) illumination. The standard deviation of the pixel responsivity was under 10%, confirming the uniformity of the fabrication process. The response time was 2.2 ± 0.13 ms, and the bandwidth was 159.1 Hz. A prototype 1310-nm SWIR imager demonstrated that the QD photodiode-based SWIR image sensor is a cost-effective and practical alternative for III-V SWIR image sensors.

    Original languageEnglish
    Pages (from-to)20659-20665
    Number of pages7
    JournalOptics Express
    Volume30
    Issue number12
    DOIs
    Publication statusPublished - 2022 Jun 6

    Bibliographical note

    Publisher Copyright:
    © 2022 Optica Publishing Group

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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