| 초록 |
In this study, a novel film formation technique is demonstrated, named decal-coating, as a thin film printing process using the urethane acrylate-based polymer mediator. By optimizing the surface properties of the mediators, the decal-coating process is successfully demonstrated by transferring the photoactive layer composed of the PTB7-Th as polymer donor and IEICO-4F as non-fullerene acceptor. This process forms a well-ordered morphology of photoactive material, minimized damage to the underlying layer by suppressing the solvent penetration. Both photovoltaics and photodetectors prepared by the decal-coated photoactive layers showed higher performance (PCE = 10.69% and Specific Detectivity = 1.27 × 1012 A cm Hz1/2 W−1, respectively) than the spin-coated owing to favorable charge transport based on morphology inversion and sharp interface in normal structured devices. Therefore, the decal-coating process is an promising coating technique for efficient organic optoelectronic devices. |
