Poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) is used in a broad range of organic electronics devices, where their performance can be dramatically enhanced by solvent processing. The morphological changes that occur with solvent processing, as well as the impact of deposition technique, are not well understood, but this understanding is crucial to rationally tune the performance of PEDOT:PSS. In this study, the change in the morphology and conductivity of spray-coated PEDOT:PSS films with pre- and post-deposition processing in the presence of polar solvents is investigated by means of neutron scattering. Deuterium labeling of PSS is used to distinguish between the PEDOT and PSS phases. Changes in the morphology of PEDOT:deuterated PSS (PEDOT:dPSS) films with the addition of 5% dimethyl sulfoxide (DMSO) to the pre-deposition PEDOT:dPSS solutions enhances the conductivity by ca. 60-fold, and is further enhanced by ca. 2-fold by soaking the films in ethylene glycol (EG). Neutron scattering reveals that the morphology of the spray-coated PEDOT:dPSS film consists of a two-phase structure on the micron to nanometer length scales, where more locally ordered PEDOT-rich fibril-like domains are dispersed on the smallest length scale. Upon DMSO addition, the PEDOT:dPSS domain sizes decrease dramatically. However, with soaking in EG, the sizes of the local domains increase isotropically. Thus, the enhanced electrical conductivity of the spray-coated PEDOT:dPSS with solvent doping is dominated by morphological changes, and not changes in the PEDOT:dPPS composition in these spray-coated films.

聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）被广泛用于有机电子设备中，通过溶剂处理可以显着提高其性能。溶剂处理过程中发生的形态变化以及沉积技术的影响尚未得到很好的理解，但是这种理解对于合理调整PEDOT：PSS的性能至关重要。在这项研究中，通过中子散射研究了在极性溶剂存在下进行预沉积和后沉积处理的喷涂PEDOT：PSS膜的形貌和电导率变化。PSS的氘标记用于区分PEDOT和PSS相。PEDOT：氘代PSS（PEDOT：约。60倍，并进一步增强约。通过将薄膜浸泡在乙二醇（EG）中2倍。中子散射表明，喷涂的PEDOT：dPSS薄膜的形貌由微米至纳米长度尺度上的两相结构组成，其中局部排列更丰富的PEDOT富含原纤维状结构域以最小长度尺度分布。添加DMSO后，PEDOT：dPSS域的大小会急剧减小。然而，随着EG的浸透，局部区域的大小各向同性地增加。因此，具有溶剂掺杂的喷涂的PEDOT：dPSS的增强的电导率由形态变化决定，而不是这些喷涂的膜中的PEDOT：dPPS组成的变化。