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<p>To enhance photoelectric performance of photomultiplication-type organic photodetectors (PM-OPDs), the PM-OPDs with mass ratio of P3HT: PC<sub>61</sub>BM: IT-4&#xa0;F = 100:5 − <i>x</i>:<i>x</i> were fabricated and characterized. Experiments suggest that the PM-OPDs with <i>x</i> = 3 perform best among various devices and exhibit a wide spectral response in the 400–850&#xa0;nm range and have an external quantum efficiency of 13,180%, specific detectivity of 2.30 × 10¹² Jones and photoresponsivity of 85.90&#xa0;A/W under 808&#xa0;nm illumination and at − 15&#xa0;V bias, which is 2.27, 3.8 and 2.29 times larger than that of those with <i>x</i> = 0, respectively. Besides, the photomultiplication mechanism of the devices was researched.</p> Graphical abstract <p></p>

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High-performance photomultiplication-type organic photodetectors based on ternary bulk heterojunction

  • 期刊论文

  • 发表日期：

    2026年3月30日

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  • Yao Li,
  • Kailiang Bai,
  • Wenshu Chen,
  • Yi Long,
  • Hu Liu,
  • Feiping Lu

摘要

To enhance photoelectric performance of photomultiplication-type organic photodetectors (PM-OPDs), the PM-OPDs with mass ratio of P3HT: PC61BM: IT-4 F = 100:5 − x:x were fabricated and characterized. Experiments suggest that the PM-OPDs with x = 3 perform best among various devices and exhibit a wide spectral response in the 400–850 nm range and have an external quantum efficiency of 13,180%, specific detectivity of 2.30 × 10¹² Jones and photoresponsivity of 85.90 A/W under 808 nm illumination and at − 15 V bias, which is 2.27, 3.8 and 2.29 times larger than that of those with x = 0, respectively. Besides, the photomultiplication mechanism of the devices was researched.

Graphical abstract