Organic semiconducting conjugated polymers are ubiquitous in organic electronics. Present in cutting-edge devices like organic photovoltaics, 2,3 organic light-emitting diodes, and organic field-effect transistors, they also hold great promise for high performance organic batteries, thermoelectric generators, photodetectors, and organic electrochemical transistors. Their development is essential in driving the next generation of low-energy, lowcarbon-emission technologies. What sets these polymers apart from their small organic semiconducting molecules counterparts is their advantageous solution-processability for large-scale device fabrication, superior chemical and photostability, and enhanced film morphology well-suited for flexible electronics. The design and synthesis of conjugated polymers have rapidly evolved, and they increased in complexity, diversity and scope of applications. Currently, most high-performance conjugated polymers are synthesized through palladium-catalyzed cross-coupling reactions, particularly using the Stille polycondensation, which involve halogenated derivatives with stannylated reagents. This methodology has afforded numerous stateof-the-art materials now routinely used in research laboratories to push the boundaries of organic electronic devices performances. Despite its efficacy and versatility, this reaction presents significant challenges for large-scale production. Issues like batch-to-batch variability, problematic by-products, and the costly and environmentally taxing removal of residual palladium and toxic stannylated compounds hinder its practicality for industrial applications and the mass-production of reproducible and stable devices. Moreover, hard-to-remove residual ligand or metallic impurities lower the material performances and stability over time. Many precautions and parameters need to be taken into account to obtain a high quality material. Recent advances in C-H arylation reactions have offered elegant and promising alternatives, eliminating the need for toxic stannylated reagents. That being said, these reactions still suffers from similar pitfalls regarding side-reactions. Other promising methods, such as Aldol condensation, have successfully produced low-bandgap, high-performance semiconducting polymers presenting low LUMO levels with minimal waste. However, this reaction is limited by the functional groups required for polymerization, which are less versatile compared to halogens or organotins and harder to install on every aromatic building block of interest. To overcome these limitations, innovative approaches are needed, which consist of: strategies that enable precise polymer structures with minimal waste and purification are particularly attracting. Such novel polymerization methodologies have been pursued with success. A family of material answering some of these requirements is dynamic covalent imine-based conjugated polymers. These structures are formed via the condensation of amine and aldehyde functionalized building blocks, yielding water as the only by-product. While imines are attractive due to their ease of synthesis, their reversible nature and the lower conjugation in the resulting polymer have so far limited their application in organic electronics. However, imines now shine as key functional groups in the preparation of recyclable or transient electronics, especially in bio-sensing devices, where their progressive degradation by hydrolysis is a desired feature. In this work, we report a novel approach to bridge the gap between traditional stable conjugated polymers and dynamic imine-based materials. We exploit the light-driven azabenzannulation of perylenediimides (PDIs) into BisAzaCoroneneDiimides (BACDs) discovered in our group to develop a so-called "light-frozen" dynamic covalent synthesis (Figure ), combining the use of dynamic building blocks with the stability of kinetically inert materials. We produce conjugated polymers in two steps: a dynamic poly-imine formation followed by irreversible oxidative photocyclizations under white light irradiation. This method enables the creation of a new class of electron-accepting polycyclic aromatic hydrocarbon (PAH) diimide-based polymers. If other strategies exist to freeze or lock the imine bond, most of them lead to a decrease or disappearance of electronic communications. Here, a new conjugated C-C bond is formed. Not only diimide-based materials are promising electron-acceptors, but their development is also crucial in addressing the current limitations of n-type semiconducting polymers compared to their more advanced p-type counterparts. BACD-based polymers are prepared without the use of toxic or precious metals and homo-coupling reactions are not achievable in these conditions, greatly limiting the introduction of defects. (NH2)2PDIs can be reacted with any optoelectronicaly active ditopic aldehyde of choice, which ensure a wide diversity of accessible materials knowing that formylated conjugated building blocks are easily accessible synthetically and commercially. We explored and optimized their synthesis and investigated their promising optoelectronic properties. BACD-based polymers can be tuned to strongly absorb light across the visible spectrum and display low LUMO energy. Remarkably, they demonstrate strong inter-chains interactions upon electrochemical reduction in solutions, which is highly promising for their future applications as active thin films in organic electronic devices.