Phase Control Behavior of Lateral Polymer Photodetectors Using Strong Aggregation Bulk Heterojunction Film,Macromolecular Chemistry and Physics

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Phase Control Behavior of Lateral Polymer Photodetectors Using Strong Aggregation Bulk Heterojunction Film
Macromolecular Chemistry and Physics ( IF 2.5 ) Pub Date : 2020-03-03 , DOI: 10.1002/macp.201900474
Tao Han _{1,

2,

3} , Qiao Liu ₄ , Yanxi Guo ₁ , Gui Jin ₁ , Shufang Ding ₁ , Min Yao ₁ , Chunzhi Jiang ₁ , Huanyou Wang _{1,

3} , Xiaoyi Huang ₁ , Fa Chang ₂

Affiliation

The aggregation behavior of polymers can ultimately have a significant impact on the performance of polymer photodetectors depends mainly on the main solvent, solvent additive, thermal annealing treatment, and so on. In this work, a phase control behavior of lateral polymer photodetectors (L‐PPDs) is realized by changing the acceptor concentration or introducing 1,8‐diiodooctane (DIO) in strong aggregation of bulk heterojunction (BHJ) films, which can effectively regulate the minority carriers trapping under high PC₆₁BM ratio. Additionally the responsivity (R), gain (G) and specific detectivity (D*) value of the L‐PPDs can reach 94.4 A W⁻¹, 289.7, and 1.33 × 10¹⁴ Jones under 0.0031 mW cm⁻² @405 nm, respectively. The structure of the L‐PPDs is optimized as quartz/ PMMA (30 nm)/ PffBT4T‐2OD:PC₆₁BM (D/A ratio = 1:1.2)/ Ag–Ag electrodes. Furthermore, the phase separation of the thin films is promoted by introducing 3% DIO, resulting in a clear increase of response speed (fall time is about tenfold faster than that of the control device), and an improved switching performance about 60‐fold higher under strong light (10.42 mW cm⁻²). This research represents an important step forward in the fabrication of high‐performance polymer photodetectors, which show promising application potential.

中文翻译：

使用强聚集体体异质结薄膜的横向聚合物光电探测器的相控行为

聚合物的聚集行为最终可能对聚合物光电探测器的性能产生重大影响，主要取决于主要溶剂，溶剂添加剂，热退火处理等。在这项工作中，通过改变受体浓度或在体异质结（BHJ）薄膜的强聚集中引入1,8-二碘辛烷（DIO），可以实现横向聚合物光电探测器（L-PPD）的相控行为。少数载流子在高PC ₆₁ BM比下被困。此外，该响应（R），增益（G）和比检测率（d *）的L-的PPD的值可以达到94.4 AW ^-1，289.7，和1.33×10 ¹⁴个0.0031毫瓦厘米琼斯^-2分别为405 nm。L‐PPD的结构已优化为石英/ PMMA（30 nm）/ PffBT4T‐2OD：PC ₆₁ BM（D / A比= 1：1.2）/ Ag–Ag电极。此外，通过引入3％的DIO可以促进薄膜的相分离，从而显着提高响应速度（下降时间比控制设备快约十倍），并且开关性能提高了约60倍。在强光下（10.42 mW cm ^-2）。这项研究代表了高性能聚合物光电探测器在制造方面迈出的重要一步，这些光电探测器显示出广阔的应用潜力。

更新日期：2020-03-03

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