AI 中文总结
研究六种共沉积有机半导体玻璃混合物的稳定性与各向异性分子堆积，用差示扫描量热法等研究发现其有超稳定行为，且混合物双折射可由纯组分玻璃双折射预测，有助于设计新型电子器件。
AI 中文摘要
气相沉积的有机半导体玻璃混合物常用于有机电子器件的活性层，其寿命和性能受混合玻璃稳定性和结构的强烈影响。本文通过差示扫描量热法和光谱椭偏仪研究了六种重量比为50:50的共沉积有机半导体玻璃混合物的稳定性和各向异性分子堆积。发现所有六种二元体系都表现出高动力学稳定性，相对于相应的液冷玻璃态混合物焓显著降低（超稳定行为）。此外，共沉积玻璃混合物的双折射可由两种纯组分玻璃的双折射预测。这些稳定性和结构结果有望应用于其他共沉积有机半导体玻璃混合物，对设计具有更长寿命和更高运行效率的新型电子器件具有重要意义。
英文摘要
Vapor-deposited glass mixtures of organic semiconductors commonly serve as active layers in organic electronic devices, whose lifetime and performance are strongly influenced by the stability and structure of these mixed glasses. Here, we study the stability and anisotropic molecular packing of six co-deposited organic semiconductor glass mixtures with 50:50 weight ratio, by differential scanning calorimetry and spectroscopic ellipsometry. We find that all six binary systems exhibit high kinetic stability and significantly reduced enthalpy relative to the corresponding liquid-cooled glassy mixtures (ultrastable behavior), even for systems where the glass transition temperatures of the components differ by more than 90 K. Furthermore, we demonstrate that the birefringence of a co-deposited glass mixture, a measure of its anisotropic packing, can be predicted from the birefringence of glasses of the two pure components. These results for stability and structure are expected to be applicable to other co-deposited organic semiconductor glass mixtures, so long as the two components mix well in the glass and individually can form ultrastable glasses. Therefore, our findings are significant for designing novel electronic devices with enhanced device lifetime and increased operational efficiency.
Comments5 figures, 27 pages, 51 references, Supplemental Information (6 figures)
Journal refChem. Mater. 2024, 36, 3205-3214
DOI：10.1021/acs.chemmater.3c02935
