In this work, single-layered, bi-layered and tri-layered poly(vinyl-carbazole) (PVK) thin films were produced by spin-coating and self-assembling techniques and their morphological and photophysical properties were determined by time-resolved fluorescence spectroscopy, atomic force microscopy (AFM) and fluorescence microscopy. The effect of distinct aggregates formed in thin films on their photophysical and morphological properties was determined, evidencing that procedure control is essential to determine PVK thin film application. It was found that sandwich excimers are dominant in self-assembled films, evidenced by longer fluorescence lifetimes and red-shifted emissions, while in spin-coated films, shorter fluorescence lifetimes evidenced more efficient non-radiative energy transfer. AFM showed that consecutive deposited layers result in more uniform, thinner films when produced by spin-coating, but showing aggregation heterogeneity as evidenced by fluorescence spectroscopy. Yet, self-assembled films are rough, heterogeneous and thicker, showing prevalence of less variety of aggregates. These are crucial findings to address PVK application.

在这项工作中，通过旋涂和自组装技术制备了单层、双层和三层聚（乙烯基咔唑）（PVK）薄膜，并通过时间分辨荧光测定了它们的形态和光物理特性。光谱、原子力显微镜 (AFM) 和荧光显微镜。确定了薄膜中形成的不同聚集体对其光物理和形态特性的影响，证明程序控制对于确定 PVK 薄膜应用至关重要。发现夹心准分子在自组装薄膜中占主导地位，这可以通过更长的荧光寿命和红移发射来证明，而在旋涂薄膜中，更短的荧光寿命证明了更有效的非辐射能量转移。AFM 表明，连续沉积层在通过旋涂生产时会产生更均匀、更薄的薄膜，但如荧光光谱所证明的那样，显示出聚集异质性。然而，自组装薄膜粗糙、不均匀且较厚，显示出较少种类的聚集体的普遍存在。这些是解决 PVK 应用问题的重要发现。