Enhancing Dynamic Range in Low-Noise 2D-Integrated Organic Photodiodes by Mitigating Langevin Recombination.
basic_science · Level V
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- Record sourced from PubMed, PMID 39842878.
- Also identified by DOI 10.1021/acsnano.4c15041.
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Abstract
Organic photodiodes (OPDs) are a significant focus for the next-generation of light-detection technologies. However, organic semiconductors in OPDs still face key challenges, such as low carrier mobilities and limited efficiency in generating photon-induced signals, which affect the detectable resolution and dynamic range. In this study, the characterization of the interaction between organic polymeric bulk heterojunctions and two-dimensional (2D) transition metal dichalcogenides (MoS<sub>2</sub>) reveals an enhancement in photocurrent due to improved photogeneration dynamics (e.g., reduction of bimolecular recombination and enhancing charge carrier transfer). Consequently, the optimized 2D MoS<sub>2</sub>-additive OPD achieved an exceptionally high linear dynamic range (LDR) exceeding 174 dB and an outstanding specific detectivity (<i>D</i>*) of 3.21 × 10<sup>12</sup> Jones, while reaching femto-scale noise levels. This presents the potential of state-of-the-art OPDs for various light signal applications.