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<p>Alternating current (AC) driven quantum dots (QDs) light-emitting diodes have attracted widespread attention due to their unique optoelectronic performance. An AC-driven device with an interdigital electrode structure is proposed. The devices exhibit AC electroluminescence (EL) with driving frequency and different frequency responses due to the introduction of P(VDF-TrFE-CFE). The optical and electrical characteristics of the device under various applied voltages and driving frequencies are studied. Unlike the conventional driving mode where carriers are continuously injected into the device, the carriers undergo periodic motion under an AC field. Therefore, there exists an optimal driving frequency that maximizes the EL intensity of the device. Based on the experimental results, the operational mechanism of the device is analyzed, and a carrier transport model is proposed to elucidate the underlying factors contributing to the presence of an optimal driving frequency. Moreover, a model for the device is proposed and its accuracy is verified. From a circuit perspective, the EL behavior of devices at various driving frequencies is analyzed, thereby further confirming the accuracy of the proposed device working mechanism. We believe the work can provide guidance for obtaining advanced QD-based light-emitting technology.</p>

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Interdigital electrode-based quantum dot light-emitting device without carrier injection/transport layers

  • 期刊论文

  • 发表日期：

    2025年4月27日

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  • Junlong Li,
  • Hao Su,
  • Wei Huang,
  • Rong Chen,
  • Jianbi Le,
  • Min Lin,
  • Xiongtu Zhou,
  • Yongai Zhang,
  • Tailiang Guo,
  • Chaoxing Wu

摘要

Alternating current (AC) driven quantum dots (QDs) light-emitting diodes have attracted widespread attention due to their unique optoelectronic performance. An AC-driven device with an interdigital electrode structure is proposed. The devices exhibit AC electroluminescence (EL) with driving frequency and different frequency responses due to the introduction of P(VDF-TrFE-CFE). The optical and electrical characteristics of the device under various applied voltages and driving frequencies are studied. Unlike the conventional driving mode where carriers are continuously injected into the device, the carriers undergo periodic motion under an AC field. Therefore, there exists an optimal driving frequency that maximizes the EL intensity of the device. Based on the experimental results, the operational mechanism of the device is analyzed, and a carrier transport model is proposed to elucidate the underlying factors contributing to the presence of an optimal driving frequency. Moreover, a model for the device is proposed and its accuracy is verified. From a circuit perspective, the EL behavior of devices at various driving frequencies is analyzed, thereby further confirming the accuracy of the proposed device working mechanism. We believe the work can provide guidance for obtaining advanced QD-based light-emitting technology.