compound

WO2025186103A8 Publication Date: 2025-10-02SUMITOMO CHEM CO LTD +1
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Patent Information

Application Number
PCT/EP2025/055387
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-11-18
Filing Date
2025-02-27
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

Existing electron-accepting materials in organic photodetectors, such as fullerenes and non-fullerene acceptors, face challenges in optimizing energy levels and absorption spectra for improved performance in photoresponsive devices.

Method used

Development of novel compounds with specific structural formulas (I) and (II) that incorporate divalent and monovalent electron-accepting and electron-donating groups, featuring bridging units and substituents to enhance LUMO levels and absorption wavelengths, forming bulk heterojunction layers with electron-donating materials for improved device efficiency.

Benefits of technology

The new compounds achieve deeper LUMO levels and extended absorption wavelengths, enhancing the performance of organic photodetectors, particularly in detecting light beyond 900 nm, and improving the overall efficiency of organic photoresponsive devices.

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Abstract

A compound of formula (I) or (II), wherein: A1 is a divalent heteroaromatic electron-accepting group; A2 and A3 independently in each occurrence is a monovalent electron-accepting group; D1, D2 and D3 independently in each occurrence is an electron-donating group; B1, B2, and B3 independently in each occurrence is a bridging group; x1 and x2 are each independently 0, 1, 2 or 3; x3 and x4 are each independently 0, 1, 2 or 3; y1, y2 and y3 are each independently at least 1; z1 and z2 are each independently 0, 1, 2 or 3; and wherein at least one occurrence of D1 of formula (I) or at least one occurrence of at least one of D2 and D3 of formula (II) is a group of formula (III), wherein: X1 and X2 are each independently selected from is O, S and NR1 wherein R1 is H or a substituent, with the proviso that at least one of X1 and X2 is NR1; Y is O or S; Ar1 and Ar2 are each independently is a monocyclic or fused aromatic or heteroaromatic group or is absent; R1 is H or a substituent; and R2 in each occurrence is independently a substituent.
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