王建彬, 曾夏辉, 周笔, 余华梁, 周赢武. 基于非富勒烯受体IEICO-4F的倍增型有机光电探测器[J]. 华南师范大学学报(自然科学版), 2021, 53(4): 1-7. doi: 10.6054/j.jscnun.2021051
引用本文: 王建彬, 曾夏辉, 周笔, 余华梁, 周赢武. 基于非富勒烯受体IEICO-4F的倍增型有机光电探测器[J]. 华南师范大学学报(自然科学版), 2021, 53(4): 1-7. doi: 10.6054/j.jscnun.2021051
WANG Jianbin, ZENG Xiahui, ZHOU Bi, YU Hualiang, ZHOU Yingwu. Photomultiplication-type Organic Photodetectors Based on Non-fullerene Acceptor IEICO-4F[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(4): 1-7. doi: 10.6054/j.jscnun.2021051
Citation: WANG Jianbin, ZENG Xiahui, ZHOU Bi, YU Hualiang, ZHOU Yingwu. Photomultiplication-type Organic Photodetectors Based on Non-fullerene Acceptor IEICO-4F[J]. Journal of South China Normal University (Natural Science Edition), 2021, 53(4): 1-7. doi: 10.6054/j.jscnun.2021051

基于非富勒烯受体IEICO-4F的倍增型有机光电探测器

Photomultiplication-type Organic Photodetectors Based on Non-fullerene Acceptor IEICO-4F

  • 摘要: 以非富勒烯材料O-IDTBR和IEICO-4F为电子受体,采用溶液法制备结构为ITO/PEDOT∶PSS/P3HT∶O-IDTBR/Al和ITO/PEDOT∶PSS/P3HT∶IEICO-4F/Al的2种倍增型有机光电探测器. IEICO-4F器件在波长400 nm和790 nm处的最高外量子效率(EQE)分别达7 220% 和1 610%. 在-15 V偏压下,IEICO-4F器件EQE大于100%的光谱响应范围(300~840 nm)比O-IDTBR器件(320~740 nm)宽120 nm. 与-15 V偏压下的O-IDTBR器件相比,IEICO-4F器件在波长400、510、600、790 nm处的EQE(2 630%、1 220%、1 900%、409%)分别提升1.7、1.2、0.5、24.5倍以上. 此外,IEICO-4F器件在400、510、600、790 nm处的探测灵敏度(4.8×1012、2.8×1012、5.2×1012、1.5×1012 cm·Hz1/2·W-1)分别是O-IDTBR器件的3.2、2.5、1.8、30.6倍. 结果表明:采用吸收与P3HT更互补(带隙更窄)的非富勒烯材料IEICO-4F为电子受体,有利于提升倍增型有机光电探测器的性能(特别是器件对近红外光的响应与探测能力),并拓宽器件的光谱响应范围.

     

    Abstract: With the solution-processing method, photomultiplication (PM)-type organic photodetectors (OPDs) were fabricated with the structures of ITO/PEDOT: PSS/P3HT: IEICO-4F/Al and ITO/PEDOT: PSS/P3HT: O-IDTBR/Al, in which non-fullerene acceptor materials IEICO-4F and O-IDTBR were used as electron acceptors. The highest external quantum efficiency (EQE) of the device based on IEICO-4F-can reach 7 220% and 1 610% at 400 nm and 790 nm, respectively. Under -15 V bias, the EQE of IEICO-4F-based device exceeds 100% in the range of 300 to 840 nm, which is about 120 nm broader than O-IDTBR-based-devices (320 to 740 nm). Compared with the O-IDTBR-based device under -15 V bias, the EQEs (2 630%, 1 220%, 1 900%, 409%) of the IEICO-4F-based device at the wavelength of 400, 510, 600 and 790 nm are 1.7, 1.2, 0.5 and 24.5 times larger, respectively. In addition, the detectivity of IEICO-4F-based device at 400, 510, 600 and 790 nm (4.8×1012, 2.8×1012, 5.2×1012 and 1.5×1012 cm·Hz1/2·W-1) are 3.2, 2.5, 1.8 and 30.6 times as large as those of the O-IDTBR-based device, respectively. These results show that the use of non-fullerene materials IEICO-4F (narrower band gap) with absorption more complementary to P3HT as electron acceptors is beneficial for improving the performance of PM-type OPDs, especially the responsivity and detectivity in near-infrared region, with broadened spectral response range.

     

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