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Highly Sensitive Narrowband Photomultiplication-Type Organic Photodetectors Prepared by Transfer-Printed Technology

机译：高度敏感的窄带光锁相色谱型通过转印技术制备的有机光电探测器

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摘要

Narrowband photomultiplication-type organic photodetectors (PMOPDs) are realized with poly(3-hexylthiophene-2,5-diyl) (P3HT) as the optical field adjusting (OFA) layer and transfer-printed P3HT: [6,6]-phenyl-C-71-butyric acid methyl ester (PC71BM) (50:1, w/w) as the photomultiplication (PM) layer. The thickness of the OFA layers is adjusted to optimize interfacial trapped electron distribution and density, which determines the external quantum efficiency (EQE) and spectral response range of PMOPDs. Narrowband PMOPDs with 2.5 mu m thick P3HT as the OFA layer exhibit two narrow response peaks at 350 and 660 nm, and the corresponding EQE values at 350 and 660 nm are 180% and 760% under an applied bias of -20 V. A wide bandgap polymer poly[N,N '-bis(4-butylphenyl)-N,N '-bis(phenyl)benzidine] (P-TPD) is deliberately incorporated into OFA layer for adjusting interfacial trapped electron distribution near Al electrode. Narrowband PMOPDs exhibit only one response peak at 660 nm with the enhanced EQE value of 1120% under the same bias. The enhanced EQE of PMOPDs with P-TPD is primarily attributed to the increased hole tunneling injection and transport, which can be ascribed to the enhanced trapped electron density near the Al electrode and the improved hole mobility, respectively. Clearly resolved images can be obtained from the imaging system with the narrowband PMOPDs as sensing pixel without any current preamplifier, indicating the promising potential of PMOPDs in imaging sense.
机译：用聚（3-己基噻吩-2,5-二基）（P3HT）实现窄带光锁相型有机光电探测器（PMOPDS）作为光场调节（OFA）层和转印印刷的P3HT：[6,6] - 苯基 - 苯基 - C-71-丁二酸甲基酯（PC71BM）（50：1，W / W）作为光锁定（PM）层。调整OFA层的厚度以优化界面捕获的电子分布和密度，其确定PMOPDS的外部量子效率（EQE）和光谱响应范围。具有2.5μm厚的p3ht的窄带pmopds，因为OFa层在350和660nm处表现出两个窄的响应峰，并且在-20v的施加偏差下，350和660nm处的相应的EQE值为180％和760％。带隙聚合物聚[n，n'-bis（4-丁基苯基）-n，n'-bis（苯基）苯并丁丝]（p-tpd）被故意掺入OFA层中，用于调节Al电极附近的界面被困电子分布。窄带PMOPDS在660nm处仅表现出一个响应峰值，在同一偏压下增强的EQE值为1120％。具有P-TPD的PMOPD的增强型EQE主要归因于增加的孔隧穿注射和运输，其可以分别归因于Al电极附近的增强的被捕获的电子密度和改进的空穴迁移率。可以从成像系统中利用窄带PMOPDS获得清晰的图像，作为感测像素，没有任何电流前置放大器，表示PMOPDS在成像意义上的有希望的潜力。

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  • 来源
    《Advanced Functional Materials》 |2021年第43期|2106009.1-2106009.9|共9页
  • 作者

    Zhao Zijin; Liu Ming; Yang Kaixuan; Xu Chunyu; Guan Yunxia; Ma Xiaoling; Wang Jian; Zhang Fujun;

  • 作者单位

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

    Chongqing Normal Univ Coll Phys & Elect Engn Chongqing 401331 Peoples R China;

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

    Taishan Univ Coll Phys & Elect Engn Tai An 271021 Shandong Peoples R China;

    Beijing Jiaotong Univ Lab Luminescence & Optic Informat Minist Educ Beijing 100044 Peoples R China;

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  • 正文语种 eng
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  • 关键词

    imaging sense; narrowband; organic photodetectors; photomultiplication; transfer printed;

    机译：成像感;窄带;有机光电探测器;光锁相;转移印刷;

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