Wide spectrum quaternary organic photomultiplier detector based on double doping

• Published in: Optical materials 2022-11, Vol.133, p.113001, Article 113001
• Main Authors: An, Tao, Pang, Jiahao, Zhang, Ruliang, Lu, Gang
• Format: Article
• Language: English
• Subjects: Double-doped; Electron trap; High injection efficiency; Quaternary organic photomultiplier detector; Single-doped
• ISSN: 0925-3467; 1873-1252
• DOI: 10.1016/j.optmat.2022.113001

In order to realize the high concentration electron trap doping in the active layer of the wide spectrum quaternion blend, and obtain the low voltage, wide spectrum and high detection rate detector. A double trap C60: C70 doped P3HT:PTB7:IEICO-4F:PC61BM quadruple heterojunction photodetector is studied in this paper. Under the -2 V bias and 460 nm, Pin = 0.21 mW ·cm−2 light, the external quantum efficiency of double-doped C60:C70 device is 4556.87%, which is 19.86 times higher than that of single-doped C60, and the Nq increases by one order of magnitude. The results show that doping double-electron trap in the active layer of the quaternary organic detector can effectively improve the dispersion of impurities and weaken the agglomeration, improve the doping concentration and trap concentration at high doping efficiency, enhance the hole injection, and improve the photocurrent. It provides a new idea for realizing a wide spectrum quaternary organic photodetector with high multiplication efficiency. •Double trap quaternary heterojunction.•Double - doped electron trap is used to improve impurity dispersion and reduce agglomeration.•High doping efficiency, high trap concentration,high hole injection.