在具有优化微观结构的聚芴薄膜中实现光致发光的大幅增强。

Todor-Boer Otto, Farcău Cosmin, Botiz Ioan

Research Institute for Analytical Instrumentation Subsidiary, National Institute for Research and Development of Optoelectronics Bucharest INOE 2000, 67 Donath Street, 400293 Cluj-Napoca, Romania.

National Institute for Research and Development of Isotopic and Molecular Technologies INCDTIM, 67-103 Donath Street, 400293 Cluj-Napoca, Romania.

Polymers (Basel). 2024 Aug 11;16(16):2278. doi: 10.3390/polym16162278.

There is a clearly demonstrated relationship between the microstructure, processing and resulting optoelectronic properties of conjugated polymers. Here, we exploited this relationship by exposing polyfluorene thin films to various solvent vapors via confined-solvent vapor annealing to optimize their microstructure, with the final goal being to enhance their emission properties. Our results have demonstrated enlargements in photoluminescence intensity of up to 270%, 258% and 240% when thin films of polyfluorenes of average molecular weights of 105,491 g/mol, 63,114 g/mol and 14,000 g/mol, respectively, experienced increases in their -phase fractions upon processing.

共轭聚合物的微观结构、加工过程与最终的光电性能之间存在明确的关系。在此，我们通过受限溶剂蒸汽退火将聚芴薄膜暴露于各种溶剂蒸汽中，利用这种关系来优化其微观结构，最终目标是增强其发光性能。我们的结果表明，当平均分子量分别为105,491 g/mol、63,114 g/mol和14,000 g/mol的聚芴薄膜在加工过程中其β相分数增加时，光致发光强度分别提高了270%、258%和240%。