Multiplication type organic photoelectric detector with narrowband and broadband optical detection capabilities

[0046] Embodiment 1 A multiplied organic photodetector with both narrowband and broadband light detection capabilities

[0047] A multiplied organic photodetector with both narrowband and broadband light detection capabilities, including: a transparent substrate 1, a transparent anode 2, an anode modification layer 3, an active layer 4 and a semitransparent metal electrode 5, such as figure 1 shown.

[0048] The transparent substrate 1 is glass; the transparent electrode 2 is ITO; the transparent electrode modification layer 3 is PEDOT:PSS; the active layer 4 is a blend film of P3HT and PCBM with a mass ratio of 100:1 , with a thickness of 2.5 microns; the translucent metal cathode 5 is an aluminum electrode with a thickness of 16 nanometers.

[0049] Such as figure 2 Shown, above-mentioned organic photodetector preparation method comprises the following steps:

[0050] Step 1: Prepare a transparent anode ITO on a glass substrate, then soak it in deionized water and absolute

[0057] Embodiment 2 A multiplied organic photodetector with both narrowband and broadband light detection capabilities

[0058] On the basis of Example 1, the electron donor material of the active layer 4 blended film is selected as P3HT and PTB7-Th in a weight ratio of 1:1, and the electron acceptor material is selected from PCBM, and the weight ratio of the electron acceptor remains at 100: 1, such as Figure 6 As shown, the fabricated organic photodetector produces a narrow-band response in the near-infrared band at 790 nanometers under the condition of incident light bottom incidence (ITO side), and the full width at half maximum of the response is less than 30 nanometers, and the top incidence (Al side) Under normal circumstances, a broadband response is generated in the range of 300-850 nanometers, the full width at half maximum of the response is extended to 500 nanometers, and the response cut-off edge is extended to the near-infrared band. Under bottom / top incidence c