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Facile Tuning the Detection Spectrum of Organic Thin Film Photodiode via Selective Exciton Activation
- Facile Tuning the Detection Spectrum of Organic Thin Film Photodiode via Selective Exciton Activation
- Sim, Kyu Min; Yoon, Seong Won; Cho, Jang Whan; Jang, Min Su; Chung, Dae Sung
- DGIST Authors
- Chung, Dae Sung
- Issue Date
- ACS Applied Materials and Interfaces, 10(10), 8405-8410
- Article Type
- Chemical activation; Excitons; Image sensors; Photodetectors; Photodiodes; Semiconducting organic compounds; Semiconductor junctions; Barrier heights; Extinction coefficients; Full color images; Organic photodiodes; Organic thin films; Selective activation; Specific detectivity; Thin film filters; Thin films
- Here, we introduce a method of tuning the high-detectivity spectra of the organic photodiode (OPD) to fabricate a thin-film filter-less full-color image sensor. The strategically introduced PIN junction enables a selective activation of excitons generated from the photons with low extinction coefficient in the active layer such that the separated holes/electrons can contribute to the external current. In addition, we show that a well-defined PIN junction blocks the injection of nonallowed charge carriers, leading to very low dark current and near-ideal diode characteristics. Consequently, the high specific detectivity over 1.0 × 1012 Jones are observed from R/G/B-selective thin-film OPDs. © 2018 American Chemical Society.
- American Chemical Society
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- Department of Energy Science and EngineeringPolymer Energy Materials Lab1. Journal Articles
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