JPWO2020008185A5 - - Google Patents

Claims (16)

An organic photodetector comprising an anode, a cathode, and a photosensitive organic layer between the anode and the cathode, wherein the photosensitive organic layer comprises an electron donor material and an electron acceptor of formula (I). Including body compounds
The photodetector is connected to a voltage source configured to apply a reverse bias to the photodetector.
Organic photodetector:

(In the formula, R ¹¹ and R ¹² are selected independently from the following groups, respectively:
C _1-20 alkyl, wherein the C _1-20 alkyl may have one or more non-adjacent non-terminal C atoms substituted with O, S, CO or COO; one or more H atoms. May be substituted with F; and the terminal C atom may be substituted with Ar ² ; Ar ² is an unsubstituted or substituted aromatic or heteroaromatic group; and the formula ( Ar ¹ ) _n groups (in the formula, each Ar ¹ is an aromatic or heteroaromatic group independently substituted or substituted with one or more substituents, n is at least 1. );
R ¹³ , R ¹⁴ , and R ¹⁶ are independently selected from the group consisting of H, F, and C _1-20 alkyl at each appearance, said C _1-20 alkyl being one or more non-adjacent. The non-terminal C atom may be replaced with O, S, CO or COO, and one or more H atoms may be replaced with F;
Each R ¹⁵ is H;
R ²⁰ -R ²³ are independently selected from the group consisting of H, C _1-20 alkyl, and electron-withdrawing groups at each appearance; and each X is independently O, S, Se, Or Te. ). The organic photodetector according to claim 1, wherein at least one R ¹¹ group and / or at least one R ¹² group is a group of formula (Ar ¹ ) _n . The organic photodetector according to claim 2, wherein (Ar ¹ ) _n is phenyl, which is unsubstituted or substituted with one or more substituents. The organic photodetector according to any one of claims 1 to 3, wherein R ¹³ in each appearance is independently selected from H, C _1-20 alkyl and C _1-19 alkoxy. The organic photodetector according to any one of claims 1 to 4, wherein each R ¹⁴ is H. The organic photodetector according to any one of claims 1 to 5 , wherein each R ¹⁶ is H. The organic photodetector according to any one of claims 1 to 6 , wherein each R ²⁰ to R ²³ is H or F independently. The organic photodetector according to claim 7 , wherein each R ²⁰ , each R ²¹ , each R ²² and / or each R ²³ is F. The organic photodetector according to any one of claims 1 to 8 , wherein the weight ratio of the donor compound to the acceptor compound is about 1: 0.5 to about 1: 1.2. Including forming an organic photosensitive layer on one of the anode and the cathode and forming the other of the anode and the cathode on the organic photosensitive layer.
The formation of the organic photosensitive layer comprises depositing a formulation comprising an electron donor material and an electron acceptor compound dissolved or dispersed in one or more solvents and evaporating the one or more solvents. Item 8. The method for forming an organic light detector according to any one of Items 1 to 9 . A sensor comprising a light source and the organic photodetector according to any one of claims 1 to 9 , wherein the organic photodetector is configured to receive light emitted from the light source. 11. The sensor of claim 11 , wherein the photodetector is configured to receive light having a wavelength of 900-1000 nm. A photodetection method comprising measuring the photocurrent generated by the light incident on the photodetector according to any one of claims 1-9 . 13. The light according to claim 13 , comprising measuring the light incident on the organic photodetector and the light current generated by the light emitted from the light source in a sensor including the light source and the organic photodetector. How to detect. Use of the compound of formula (I) according to any one of claims 1-9 as a receptor in the photosensitive layer of an organic photodetector comprising a receptor and donor material. The use according to claim 15 , for reducing dark current.